WorldWideScience

Sample records for oil well drilling

  1. 25 CFR 226.25 - Gas well drilled by oil lessees and vice versa.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Gas well drilled by oil lessees and vice versa. 226.25... OSAGE RESERVATION LANDS FOR OIL AND GAS MINING Operations § 226.25 Gas well drilled by oil lessees and... to drill. When an oil lessee in drilling a well encounters a formation or zone having indications...

  2. Environmentally Assisted Cracking of Drill Pipes in Deep Drilling Oil and Natural Gas Wells

    Science.gov (United States)

    Ziomek-Moroz, M.

    2012-06-01

    Corrosion fatigue (CF), hydrogen induced cracking (HIC) and sulfide stress cracking (SSC), or environmentally assisted cracking (EAC) have been identified as the most challenging causes of catastrophic brittle fracture of drill pipes during drilling operations of deep oil and natural gas wells. Although corrosion rates can be low and tensile stresses during service can be below the material yield stress, a simultaneous action between the stress and corrosive environment can cause a sudden brittle failure of a drill component. Overall, EAC failure consists of two stages: incubation and propagation. Defects, such as pits, second-phase inclusions, etc., serve as preferential sites for the EAC failure during the incubation stage. Deep oil and gas well environments are rich in chlorides and dissolved hydrogen sulfide, which are extremely detrimental to steels used in drilling operations. This article discusses catastrophic brittle fracture mechanisms due to EAC of drill pipe materials, and the corrosion challenges that need to be overcome for drilling ultra-deep oil and natural gas wells.

  3. Drilling horizontal wells from the coast to reach offshore heavy oil pool, Puerto Escondido field, Cuba

    Energy Technology Data Exchange (ETDEWEB)

    Puentes, G.E.; Alvarez, R.R. [Cubapetroleo, Havana, (Cuba); Marrero, F.M. [Ministry of Basic Industry, Havana, (Cuba)

    1999-11-01

    A series of vertical oil wells were drilled in the Puerto Escondido field in Cuba as part of an oil exploration program in the 1970s. The drilling of well PE-3 in 1992 revealed that the field contained one of the most significant oil finds in the western region of Cuba. Due to the fractured nature of the reservoir, it was determined that future wells should be drilled using horizontal drilling technology to increase hydrocarbon recoveries, and to maintain high production rates. The first horizontal well was successfully drilled in April, 1997. Four other wells were drilled by September 1998. This paper briefly described the drilling techniques used.

  4. Modeling of well drilling heating on crude oil using microwave

    Science.gov (United States)

    Muntini, Melania Suweni; Pramono, Yono Hadi; Yustiana

    2016-03-01

    As the world's oil reserves are dwindling, some researchers have been prompted to make a breakthrough to further improve the efficiency of exploration and production. One of the technologies used is heating the crude oil. This paper presents the modeling results of heat treatment on crude oil using microwave energy. Modeling is conducted by assuming that the diameter of the well is 11,16 cm, the heat source is applied on the surface of the well, and the cut-off frequency in the air and on crude oil are 1,56 GHz. and 0.91 GHz, respectively. The energy generated by the microwave radiation is converted into heat energy which is absorbed by the crude oil. Consequently, this energy increases the temperature of crude oil through a heat transfer mechanism. The results obtained showed that the temperature of crude oil is about 200°C at a depth of 62.5cm, and at a distance of 3 cm from the center of the well. Temperature along the well follows an exponential function, which is from the center of the well in the direction radially outward from the cylinder axis. It has been observed that the temperature decreases as measured from the well surface along the cylinder.

  5. Modeling of well drilling heating on crude oil using microwave

    Energy Technology Data Exchange (ETDEWEB)

    Muntini, Melania Suweni, E-mail: melania@physics.its.ac.id; Pramono, Yono Hadi; Yustiana [Physics Department, Institut Teknologi Sepuluh Nopember, Surabaya Kampus ITS, Sukolilo, Surabaya 60111 (Indonesia)

    2016-03-11

    As the world’s oil reserves are dwindling, some researchers have been prompted to make a breakthrough to further improve the efficiency of exploration and production. One of the technologies used is heating the crude oil. This paper presents the modeling results of heat treatment on crude oil using microwave energy. Modeling is conducted by assuming that the diameter of the well is 11,16 cm, the heat source is applied on the surface of the well, and the cut-off frequency in the air and on crude oil are 1,56 GHz. and 0.91 GHz, respectively. The energy generated by the microwave radiation is converted into heat energy which is absorbed by the crude oil. Consequently, this energy increases the temperature of crude oil through a heat transfer mechanism. The results obtained showed that the temperature of crude oil is about 200°C at a depth of 62.5cm, and at a distance of 3 cm from the center of the well. Temperature along the well follows an exponential function, which is from the center of the well in the direction radially outward from the cylinder axis. It has been observed that the temperature decreases as measured from the well surface along the cylinder.

  6. The drilling of a horizontal well in a mature oil field

    Energy Technology Data Exchange (ETDEWEB)

    Rougeot, J.E.; Lauterbach, K.A.

    1991-01-01

    This report documents the drilling of a medium radius horizontal well in the Bartlesville Sand of the Flatrock Field, Osage County, Oklahoma by Rougeot Oil and Gas Corporation (Rougeot) of Sperry, Oklahoma. The report includes the rationale for selecting the particular site, the details of drilling the well, the production response, conclusions reached, and recommendations made for the future drilling of horizontal wells. 11 figs., 2 tabs.

  7. Synthesis of Carboxymethyl Starch for increasing drilling mud quality in drilling oil and gas wells

    Science.gov (United States)

    Minaev, K. M.; Martynova, D. O.; Zakharov, A. S.; Sagitov, R. R.; Ber, A. A.; Ulyanova, O. S.

    2016-09-01

    This paper describes the impact of carboxymethyl starch preparation conditions on physicochemical properties of polysaccharide reagent, widely used as fluid loss reducing agent in drilling mud. Variation of the main parameters of carboxymethylation is researched in the experiment. The following conditions such as temperature and reaction time, amount of water, as well as ratio of NaOH to monochloracetic acid define the characteristics of carboxymethyl starch. The degree of substitution is defined for polysaccharides, as well as the characteristics of samples have been studied by infrared spectroscopy. Rheological characteristics and fluid loss indicator have been investigated to study the impact of the reagents on drilling mud quality.

  8. Drilling and operating oil, gas, and geothermal wells in an H/sub 2/S environment

    Energy Technology Data Exchange (ETDEWEB)

    Dosch, M.W.; Hodgson, S.F.

    1981-01-01

    The following subjects are covered: facts about hydrogen sulfides; drilling and operating oil, gas, and geothermal wells; detection devices and protective equipment; hazard levels and safety procedures; first aid; and H/sub 2/S in California oil, gas, and geothermal fields. (MHR)

  9. Risk assessment of oil and gas well drilling activities in Iran - a case study: human factors.

    Science.gov (United States)

    Amir-Heidari, Payam; Farahani, Hadi; Ebrahemzadih, Mehrzad

    2015-01-01

    Oil and gas well drilling activities are associated with numerous hazards which have the potential to cause injury or harm for people, property and the environment. These hazards are also a threat for the reputation of drilling companies. To prevent accidents and undesired events in drilling operations it is essential to identify, evaluate, assess and control the attendant risks. In this work, a structured methodology is proposed for risk assessment of drilling activities. A case study is performed to identify, analyze and assess the risks arising from human factors in one of the on shore drilling sites in southern Iran. A total of 17 major hazards were identified and analyzed using the proposed methodology. The results showed that the residual risks of 100% of these hazards were in the acceptable or transitional zone, and their levels were expected to be lowered further by proper controls. This structured methodology may also be used in other drilling sites and companies for assessing the risks.

  10. 26 CFR 1.263(c)-1 - Intangible drilling and development costs in the case of oil and gas wells.

    Science.gov (United States)

    2010-04-01

    ... Intangible drilling and development costs in the case of oil and gas wells. For rules relating to the option to deduct as expenses intangible drilling and development costs in the case of oil and gas wells, see... case of oil and gas wells. 1.263(c)-1 Section 1.263(c)-1 Internal Revenue INTERNAL REVENUE...

  11. Asphalts tests using onshore drilling oil wells residues; Ensaios asfalticos utilizando residuos de perfuracao onshore

    Energy Technology Data Exchange (ETDEWEB)

    Lucena, Adriano Elisio de F.L.; Rodrigues, John Kennedy G.; Ferreira, Heber Carlos; Lucena, Leda Christiane de F.L. [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Lucena, Luciana de F.L. [Faculdade de Ciencias Sociais Aplicada (FACISA), Campina Grande, PB (Brazil)

    2008-07-01

    The drilling cuttings are one of the residues produced by the oils industries in large amounts during the drilling of oil wells. An alternative of final disposal of the drilling cutting residue is its utilization in asphalt mixtures. Based on this alternative, it was realized chemical and granulometric analysis and tests (Marshall and indirect tensile strength), on the asphaltic mixture using the residue from the oil drilling wells (well: 1-POTI-4-RN, located at Governador DIX-Sept Rosado - RN - Brazil). The achieved results to Marshall test indicated that for the analyzed mixture, the ideal content of residue that can be incorporated to the asphaltic composition and attend at the DNIT-ES 31 (2006) is 5%. To the indirect tensile strength test, the results showed a strength value higher than the minimum limit requested by the DNIT (0,65 MPa). The achieved results indicated the possibility of the utilization of the drilling cuttings in asphaltic pavements as fine aggregate, obeying the percentage limits, as an alternative to the final disposal. (author)

  12. Simulation of gas kicks during oil well drilling

    Directory of Open Access Journals (Sweden)

    Rolv Rommetveit

    1989-10-01

    Full Text Available A computer simulator is needed to calculate expected development of gas kicks. Such a simulator is presented, and some simulation examples are shown. The model is flexible, and can be used for research studies, well planning and training purposes. Several simulation examples are shown which illustrate some of the differences between kicks in WBM and OBM.

  13. Theoretical analysis of multiphase flow during oil-well drilling by a conservative model

    Science.gov (United States)

    Nicolas-Lopez, Ruben

    2005-11-01

    In order to decrease cost and improve drilling operations is necessary a better understood of the flow mechanisms. Therefore, it was carried out a multiphase conservative model that includes three mass equations and a momentum equation. Also, the measured geothermal gradient is utilized by state equations for estimating physical properties of the phases flowing. The mathematical model is solved by numerical conservative schemes. It is used to analyze the interaction among solid-liquid-gas phases. The circulating system consists as follow, the circulating fluid is pumped downward into the drilling pipe until the bottom of the open hole then it flows through the drill bit, and at this point formation cuttings are incorporated to the circulating fluid and carried upward to the surface. The mixture returns up to the surface by an annular flow area. The real operational conditions are fed to conservative model and the results are matched up to field measurements in several oil wells. Mainly, flow rates, drilling rate, well and tool geometries are data to estimate the profiles of pressure, mixture density, equivalent circulating density, gas fraction and solid carrying capacity. Even though the problem is very complex, the model describes, properly, the hydrodynamics of drilling techniques applied at oil fields. *Authors want to thank to Instituto Mexicano del Petroleo and Petroleos Mexicanos for supporting this research.

  14. SMART MONITORING AND DECISION MAKING FOR REGULATING ANNULUS BOTTOM HOLE PRESSURE WHILE DRILLING OIL WELLS

    Directory of Open Access Journals (Sweden)

    M. P. Vega

    Full Text Available Abstract Real time measurements and development of sensor technology are research issues associated with robustness and safety during oil well drilling operations, making feasible the diagnosis of problems and the development of a regulatory strategy. The major objective of this paper is to use an experimental plant and also field data, collected from a basin operation, offshore Brazil, for implementing smart monitoring and decision making, in order to assure drilling inside operational window, despite the commonly observed disturbances that produce fluctuations in the well annulus bottom hole pressure. Using real time measurements, the performance of a continuous automated drilling unit is analyzed under a scenario of varying levels of rate of penetration; aiming pressure set point tracking (inside the operational drilling window and also rejecting kick, a phenomenon that occurs when the annulus bottom hole pressure is inferior to the porous pressure, producing the migration of reservoir fluids into the annulus region. Finally, an empirical model was built, using real experimental data from offshore Brazil basins, enabling diagnosing and regulating a real drilling site by employing classic and advanced control strategies.

  15. Apply high-power fiber laser in oil/gas wells drilling

    Science.gov (United States)

    Jiang, Houman; Guo, Shaofeng; Chen, Minsun; Wang, Wenliang

    2015-05-01

    The concept of using lasers to drill through rock has been discussed in the oil and gas industries since the development of the high-power laser. To evaluate the possibility of fielding a laser drilling system, two laser-related problems have to be investigated. The first is the irradiation effects of laser upon rocks; the second is the effects in laser transmission from the source to the rock deep in the well. This transmission includes two stages: the first stage is the transmission inside a fiber, which is packaged in a cable and has about the same length with the well depth; the second stage refers to the transmission process when the laser leaves the fiber and some transforming optics and transmits to the rock surface, during which the well conditions may impose tough restrictions. In this paper, experiment results of laser irradiation upon siliceous sandstone and granite are reported, and the fiber transmission loss is simulated, considering the main absorbing or scattering mechanisms inside fiber. And the laser transmission from the fiber end to the rock surface, in my view, may impose great challenge on the laser drilling technology.

  16. Roughnecks, rock bits and rigs : the evolution of oil well drilling technology in Alberta, 1883-1970

    Energy Technology Data Exchange (ETDEWEB)

    Gow, A.

    2005-07-01

    This book provides a comprehensive review of the evolving technologies related to oil and gas exploration in the province of Alberta. Oil well drilling technology evolved significantly during the era of conventional oil exploration in the province, from 1883 through 1970. Technologies such as drill bits and power sources were developed largely through trial and error to meet the specific needs of individuals working in the oilfield. The competence and resolve to innovate by drill crews was told through accounts of evolution in drilling processes and equipment, along with personal accounts of those who worked on the rigs. The technology of the oilfield was placed into context with a summary of the history and geology of oil and gas in Alberta. The book also presents a considerate view of events in relation to those who invested in the industry, carried out research drilling and serviced the exploration industry. The first part of the book provides the background to the oil and gas industry. Part 2 examines the earliest technology, the standard cable tool drilling rig, the combination rig and some associated developments in drilling. The third part focuses on the rotary drilling rig and the final part outlines the types of challenges faced by the drillers and the hazards of working on Alberta's rigs. refs., tabs., figs.

  17. Perforated mechanism of a water line outlet tee pipe for an oil well drilling rig

    Directory of Open Access Journals (Sweden)

    Peng Cheng-hong

    2015-10-01

    Full Text Available A corroded tee pipe belonging to a 10-in new separator water line outlet installed in an offshore oil well drilling rig was investigated. The configuration of the large corroded pit had the shape of an imperfect horse's hoof with a completely corroded interior and a honeycomb-like cavity. There is a badly corroded pit at the welded seam at the joint connecting the tee pipe and flange. The material strength of the tee pipe meets the requirement of ASTM-A234 Gr. WPR, but its chemical composition does not meet the stipulated requirements. A deformed streamline structure or twin crystal in the ferrite phase can be seen near the surface or sub-surface of the perforated corrosion puncture edge. The micro-hardness is also different from that of the original material. The SEM results show that the puncture appears to have been a mode of quasi-cleavage fractures with secondary cracks along the direction of the crystal grain; thus, the failure has the features of mechanical and chemical corrosion. The corroded surface contains high amounts of O, C, and N, as well as S, Cl, Si, Na, Mg, Al, K, Ti, etc., all of which are corrosion products caused by sea water. The penetrating puncture hole at the turn of the tee pipe is likely the result of cavitation erosion accompanied by chemical/electrochemical corrosion, and the corrosion on the seam connecting the tee pipe and flange is likely the result of electrochemical corrosion.

  18. Drilling and well technology

    Energy Technology Data Exchange (ETDEWEB)

    Milheim, K. [Mining University Leoben Institute for Drilling Technology, (Austria)

    1996-12-31

    Over a billion dollars a year is lost by exploration and production companies drilling wells because of the lack of learn curve management (LMC) practices. This paper presents the importance of the LMC concept, what it is, why LMC has not yet been recognized as a major initiative for improving drilling cost performance. The paper discusses the different types of planning, problems with implementation of plans, the use and misuse of drilling results and data bases, and the lack of post analysis practices. The major point of the paper is to show the massive savings that can be achieved by valuing LMC, learning LMC and successfully implementing LMC. . 2 refs., 5 figs.

  19. High performance nature of biodegradable polymeric nanocomposites for oil-well drilling fluids

    Directory of Open Access Journals (Sweden)

    Tarek M. Madkour

    2016-06-01

    Full Text Available Multi-walled carbon nanotube (MWCNT and graphene nanoplatelet reinforced thermoplastic poly(lactic acid (PLA biodegradable nanocomposites were designed and prepared using solution casting techniques. The prepared biodegradable polymers are expected to provide an environmentally friendly alternative to petroleum-based polymers. Both nanocomposite systems exhibited better thermal stability and improved mechanical performance over the unreinforced polymer exhibiting excellent strength and degradability. The addition of graphene nanofiller in varied amounts was aimed to enhance the thermal and mechanical properties of the nanocomposites even further and incorporate the outstanding characteristics of graphene nanoplatelets into the nanocomposites. The polymeric nanocomposites showed also superior advantages for oil drilling relevances, automotive lubricating purposes, membrane technology and food packaging. Scanning electron microscopy images indicated a homogeneous dispersion of the nanofiller within the polymeric matrix at low filler loadings and a cluster formation at higher loadings that could be responsible for the polymeric matrix movement restrictions. The enthalpy of mixing (the polymer and the nanofiller measured could explain the cause of the repulsive interactions between the nanoparticles and the polymeric chains, which created an additional excluded volume that the polymeric segments were restricted to occupy, thus forcing the conformational characteristics of the polymeric chains to deviate away from those of the bulk chains. The prepared polymeric nano composites (poly lactic acid carbon nano tube and poly lactic acid graphene nanoplatelets were utilized in the formulation of oil-base mud as a viscosifier. The rheological, filtration properties and electrical stability of the oil based mud formulation with the new polymeric nanocomposite were studied and the result compared to the oil-based mud formulation with commercial viscosifier.

  20. Study of waste generation in the drilling and cementing operations during construction of offshore oil and gas wells

    Directory of Open Access Journals (Sweden)

    Letícia Ferraço de Campos

    2016-12-01

    Full Text Available This literature review aims to present drilling and cementing activities which take place during the construction of offshore oil and gas wells, listing the waste generated in each step. IBAMA, the environmental agency that regulates the activity, allows two disposal options for these wastes: disposal in open sea or treatment followed by disposal on shore. The documentary research applied in this article details the destination options showing that the monitoring required by the environmental agency is a way to track the actual results of the activities described.

  1. A Review of the Evaluation, Control, and Application Technologies for Drill String Vibrations and Shocks in Oil and Gas Well

    Directory of Open Access Journals (Sweden)

    Guangjian Dong

    2016-01-01

    Full Text Available Drill string vibrations and shocks (V&S can limit the optimization of drilling performance, which is a key problem for trajectory optimizing, wellbore design, increasing drill tools life, rate of penetration, and intelligent drilling. The directional wells and other special trajectory drilling technologies are often used in deep water, deep well, hard rock, and brittle shale formations. In drilling these complex wells, the cost caused by V&S increases. According to past theories, indoor experiments, and field studies, the relations among ten kinds of V&S, which contain basic forms, response frequency, and amplitude, are summarized and discussed. Two evaluation methods are compared systematically, such as theoretical and measurement methods. Typical vibration measurement tools are investigated and discussed. The control technologies for drill string V&S are divided into passive control, active control, and semiactive control. Key methods for and critical equipment of three control types are compared. Based on the past development, a controlling program of drill string V&S is devised. Application technologies of the drill string V&S are discussed, such as improving the rate of penetration, controlling borehole trajectory, finding source of seismic while drilling, and reducing the friction of drill string. Related discussions and recommendations for evaluating, controlling, and applying the drill string V&S are made.

  2. Barium and sodium in sunflower plants cultivated in soil treated with wastes of drilling of oil well

    Directory of Open Access Journals (Sweden)

    Jésus Sampaio Junior

    2015-11-01

    Full Text Available ABSTRACTThis study aimed to evaluate the effects of the application of two types of oil drilling wastes on the development and absorption of barium (Ba and sodium (Na by sunflower plants. The waste materials were generated during the drilling of the 7-MGP-98D-BA oil well, located in the state of Bahia, Brazil. The treatments consisted of: Control – without Ba application, comprising only its natural levels in the soil; Corrected control – with fertilization and without wastes; and the Ba doses of 300, 3000 and 6000 mg kg-1, which were equivalent to the applications of 16.6, 165.9 and 331.8 Mg ha-1 of waste from the dryer, and 2.6, 25.7 and 51.3 Mg ha-1 of waste from the centrifugal. Plants cultivated using the first dose of dryer waste and the second dose of centrifugal waste showed growth and dry matter accumulation equal to those of plants under ideal conditions of cultivation (corrected control. The highest doses of dryer and centrifugal wastes affected the development of the plants. The absorption of Ba by sunflower plants was not affected by the increase in the doses. Na proved to be the most critical element present in the residues, interfering with sunflower development.

  3. Drilling of oil and gas wells, upstream oil and gas subsector number 4 : Alberta, 1993 to 1997 : a summary of occupational injury and disease

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-06-01

    A summary of lost-time injuries in the well drilling sub-sector of Alberta`s upstream oil and gas industries is provided. Lost time claims are analyzed by nature of the injury, part of body affected, source of the injury, the type of event, occupation of the injured worker, and duration of the disability. Injuries are also categorized by the worker`s length of employment, age and gender. Statistical data is provided on cost of the injuries and revenue in terms of total payroll and total premiums paid by employers, as well as information on the number of employers that received or renewed a Certificate of Recognition in 1997. A summary of occupational fatality claims accepted by the Worker`s Compensation Board for compensation and brief descriptions of fatalities in the well-drilling subsector and investigated by Occupation Health and Safety during 1993 to 1997 are also included. tabs.

  4. Drilling and geophysical logs of the tophole at an oil-and-gas well site, Central Venango County, Pennsylvania

    Science.gov (United States)

    Williams, John H.; Bird, Philip H.; Conger, Randall W.; Anderson, J. Alton

    2014-01-01

    In a study conducted by the U.S. Geological Survey, in cooperation with the Pennsylvania Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey, drilling and geophysical logs were used to characterize the geohydrologic framework and the freshwater and saline-water zones penetrated by the tophole at an oil-and-gas well site in central Venango County, Pennsylvania. The geohydrologic setting of the well site is typical of the dissected Appalachian Plateau underlain by Pennsylvanian and Mississippian sandstone and shale. The drilling, gamma, and acoustic-televiewer logs collected from the 575-foot deep tophole define the penetrated Pennsylvanian and Mississippian stratigraphic units and their lithology. The caliper, video, and acoustic-televiewer logs delineate multiple bedding-related and high-angle fractures in the lower Pottsville Group and Shenango Formation from 22 to 249 feet below land surface. The caliper and acoustic-televiewer logs indicate a sparsity of fractures below 249 feet below land surface in the lowermost Shenango Formation, Cuyahoga Group, Corry Sandstone, “Drake Well” formation, and upper Riceville Formation.

  5. 30 CFR 250.462 - What are the requirements for well-control drills?

    Science.gov (United States)

    2010-07-01

    ... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Other Drilling Requirements § 250.462 What are the requirements for well-control drills? You must conduct a weekly well-control drill with each drilling crew. Your drill must familiarize the crew with...

  6. DRILL BITS FOR HORIZONTAL WELLS

    Directory of Open Access Journals (Sweden)

    Paolo Macini

    1996-12-01

    Full Text Available This paper underlines the importance of the correct drill bit application in horizontal wells. Afler the analysis of the peculiarities of horizontal wells and drainholes drilling techniques, advantages and disadvantages of the application of both roller cone and fixed cutters drill bits have been discussed. Also, a review of the potential specific featuries useful for a correct drill bit selection in horizontal small diameter holes has been highlighted. Drill bits for these special applications, whose importance is quickly increasing nowadays, should be characterised by a design capable to deliver a good penetration rate low WOB, and, at the same time, be able to withstand high RPM without premature cutting structure failure and undergauge. Formation properties will also determine the cutting structure type and the eventual specific features for additional gauge and shoulder protection.

  7. PetroChina Drills Risk Exploration Wells In Africa

    Institute of Scientific and Technical Information of China (English)

    Li Chunhui

    2006-01-01

    @@ China National Oil Development Corporation (CNODC), one of the subsidiaries under PetroChina responsible for the overseas oil exploration and development business, started to drill its first exploration well - Saha-1 - on Tenere Block in Niger on October 30. This is another risk exploration well CNODC has drilled in this region following Bel E-1 drilled on Block 350 in Algeria on September 15 and Heron-1 drilled on Block 20 in Mauritania on October 13.The drilling of those wells indicates a substantial stage of PetroChina's overseas large-scale risk oil and gas exploration in the Central and Northern Africa.

  8. Development of aqueous fluids with bentonite clay for drilling of onshore oil wells; Desenvolvimento de fluidos aquosos com bentonita para perfuracao de pocos de petroleo onshore

    Energy Technology Data Exchange (ETDEWEB)

    Nascimento, R.C.A.M.; Santana, L.N.L. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais; Amorim, L.V. [Agencia Nacional de Petroleo, Gas Natural e Biocombustiveis (PRH-25/ANP), PB (Brazil). Programa de Recursos Humanos], Email: nalealves@hotmail.com

    2010-04-15

    Due to challenges encountered in drilling wells, there is a need to develop fluids that have properties suitable and able to meet all the requirements of drilling, such as, high capacity for carrying of solid and high lubricity. Besides that, they need to be environmentally friend. The degree of impact of drilling fluids in the environment depends on the type of fluid used, if water or oil or synthetic or air based. It is therefore of fundamental importance to develop fluid with specific characteristics in each stage of drilling. Thus, the aim of this work is to develop aqueous fluids with low content of solids and rheological, filtration and lubricity properties adjusted for drilling of onshore oil wells. The fluids were formulated by using industrialized sodium bentonite, polymeric additives and lubricants, in different concentrations, in its composition. Rheological, filtration and lubricity studies showed that the fluids have pseudo plastic behavior and, the selected additives successively play their functions of rheological modifiers, filtrate reducer and lubricant agent. Moreover, it was evidenced the necessity of lubricant additives in aqueous fluids containing bentonite clay and polymers. The addition of 1% of lubricant in the fluid is sufficient to adjust the lubricant capacity of fluids. (author)

  9. Water and clay based drilling fluids for oil wells; Fluidos hidroargilosos para perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, R.C.A. de; Amorim, L.V.; Santana, L.N. de L. [Universidade Federal de Campina Grande (UFCG), PB (Brazil)], e-mail: nalealves@hotmail.com

    2008-07-01

    In the onshore drilling of wells are commonly used aqueous fluids containing bentonite clays. However, to perform their functions generally there is the necessity of additives to drilling fluids, like viscositying, filtered reducer and lubricant. Thus, this work aims to develop water and clay base drilling fluids with low solid text, and with polymeric and lubricants additives. Were studied a sample of industrialized sodium bentonite clays, three polymeric compounds in the ternary form and a sample of lubricant, in different concentrations. Were determined the flow curves, the apparent and plastic viscosities, the yield limit and gel force in Fann 35A viscometer, the filtered volume in API filter-press and the lubricity coefficient in Ofite lubricimeter. The results showed that the fluid had pseudoplastic behavior, the polymeric additives adjusts their rheological properties and filtration and the addition of 1% of lubricant is sufficient to improve the lubricity of fluids. (author)

  10. Use of Biostratigraphy to Increase Production, Reduce Operating Costs and Risks and Reduce Environmental Concerns in Oil Well Drilling

    Energy Technology Data Exchange (ETDEWEB)

    Edward Marks

    2005-09-09

    In the Santa Maria Basin, Santa Barbara County, California, four wells were processed and examined to determine the age and environment parameters in the oil producing sections. From west to east, we examined Cabot No. 1 Ferrero-Hopkins,from 3917.7 m (12850 ft) to 4032 m (13225 ft); Sun No. 5 Blair, from 3412 m (11190 ft) to 3722.5 m (12210 ft); Triton No. 10 Blair, from 1552 m (5090 ft) to 1863 m (6110 ft); and OTEC No. 1 Boyne, from 2058 m (6750 ft) to 2528 m (8293 ft). Lithic reports with lithic charts were prepared and submitted on each well. These tested for Sisquoc Fm lithology to be found in the Santa Maria area. This was noted in the OTEC No. 1 Boyne interval studied. The wells also tested for Monterey Fm. lithology, which was noted in all four wells examined. Composite samples of those intervals [combined into 9.15 m (30 foot) intervals] were processed for paleontology. Although the samples were very refractory and siliceous, all but one (Sun 5 Blair) yielded index fossil specimens, and as Sun 5 Blair samples below 3686 m (12090 ft) were processed previously, we were able to make identifications that would aid this study. The intervals examined were of the Sisquoc Formation, the Low Resistivity and the High Resistivity sections of the Monterey Formation. The Lower Sisquoc and the top of the late Miocene were identified by six index fossils: Bolivina barbarana, Gyroidina soldanii rotundimargo, Bulimina montereyana, Prunopyle titan, Axoprunum angelinum and Glyphodiscus stellatus. The Low Resistivity Monterey Fm. was identified by eight index fossils, all of which died out at the top of the late Miocene, late Mohnian: Nonion goudkoffi, Brizalina girardensis, Cibicides illingi, Siphocampe nodosaria, Stephanogonia hanzawai, Uvigerina modeloensis, Buliminella brevior, Tytthodiscus sp.and the wide geographic ranging index pelagic fossil, Sphaeroidinellopsis subdehiscens. The High Resistivity Monterey Fm. was identified by eight index fossils, all of which died

  11. Evaluation of the aging of polymeric drilling fluids to oil wells; Avaliacao do envelhecimento de fluidos de perfuracao polimericos para pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Farias, K.V.; Amorim, L.V. [Universidade Federal de Campina Grande, PB (Brazil). Unidade Academica de Engenharia Mecanica, UAEM/CCT - UFCG], e-mail: kassie@dem.ufcg.edu.br; Leite, R.S. [Universidade Federal de Campina Grande, PB (Brazil). Graduacao Engenharia de Materiais; Lira, H.L. [Universidade Federal de Campina Grande, PB (Brazil). Unidade Academica de Engenharia de Materiais, UAEMa/ CCT - UFCG

    2010-07-01

    The aim of this work is to evaluate the aging of polymeric drilling fluids to oil wells, from the rheological, filtration and lubricity properties in the temperatures 100 degree F ({approx} 38 degree C) and 150 degree F ({approx} 66 degree C). The results had been compared with a standard fluid used for the oil industry and had evidenced that the polymeric fluids had presented good thermal stability, presenting a small reduction in the rheological properties and better values of lubricity coefficient that a reference fluid. (author)

  12. 30 CFR 250.410 - How do I obtain approval to drill a well?

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 2 2010-07-01 2010-07-01 false How do I obtain approval to drill a well? 250... OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.410 How do I obtain approval to drill a well? You must obtain...

  13. Optimizing Geothermal Drilling: Oil and Gas Technology Transfer

    Energy Technology Data Exchange (ETDEWEB)

    Denninger, Kate; Eustes, Alfred; Visser, Charles; Baker, Walt; Bolton, Dan; Bell, Jason; Bell, Sean; Jacobs, Amelia; Nagandran, Uneshddarann; Tilley, Mitch; Quick, Ralph

    2015-09-02

    There is a significant amount of financial risk associated with geothermal drilling. This study of drilling operations seeks opportunities to improve upon current practices and technologies. The scope of this study included analyzing 21 geothermal wells and 21 oil and gas wells. The goal was to determine a 'Perfect Well' using historical data to compare the best oil and gas well to the best geothermal well. Unfortunately, limitations encountered in the study included missing data (bit records, mud information, etc.) and poor data collection practices An online software database was used to format drilling data to IADC coded daily drilling reports and generate figures for analysis. Six major issues have been found in geothermal drilling operations. These problems include lost circulation, rig/ equipment selection, cementing, penetration rate, drilling program, and time management. As a result of these issues, geothermal drilling averaged 56.4 days longer than drilling comparable oil and gas wells in the wells in this study. Roughly $13.9 million was spent on non-productive time in the 21 geothermal wells, compared with only $1.3 million in the oil and gas wells, assuming a cost of $50,000 per day. Comparable events such as drilling the same sized hole, tripping in/out, cementing, and running the same size casing took substantially less time in the oil and gas wells. Geothermal wells were drilled using older and/or less advanced technology to depths less than 10,000 feet, while oil and gas wells reached 12,500 feet faster with purpose built rigs. A new approach is now underway that will optimize drilling programs throughout the drilling industry using Mechanical Specific Energy (MSE) as a tool to realize efficient drilling processes. Potential improvements for current geothermal operations are: the use of electronic records, real time services, and official glossary terms to describe rig operations, and advanced drilling rigs/technology.

  14. Direction of drilling wells. Wiercenie otworow kierunkowych

    Energy Technology Data Exchange (ETDEWEB)

    Szostak, L.

    1980-01-01

    In the example of the most widespread drilling of vertical wells, an examination is made of the mining-geological and technical-technological reasons and methods for evaluating the amount of their twisting. Methods are presented for stabilizing the drilling shaft, features of drilling vertical wells by turbodrills and groups of wells for freezing rocks. Characteristics are presented for the features of directional drilling, model profiles of directed wells, drilling of wells with assigned deviation of the face from the vertical axis. Possibilities are indicated for controlling the trajectory of movement of the face of the well with the rotary method of drilling, in particular, with the use of a deviating wedge, cement plug, etc., methods of drilling inclined wells on cased and uncased sections. Features are examined of creating and controlling the inclination of a well with the use of turbodrills of different design, technology of drilling and casing of multiple-face wells, drilling of a fan of wells from one position of the drilling unit, for example, with unfavorable relief of the earth's surface and drilling of offshore wells by using floating drilling units.

  15. Post-drilling analysis of underbalanced drilled wells in Hassi-Messaoud Field, Algeria : case studies

    Energy Technology Data Exchange (ETDEWEB)

    Salim, K. [Sonatrach Inc., Alger (Algeria); Osisanya, S.O. [Oklahoma Univ., Norman, OK (United States); Madi, Y. [Algerian Petroleum Inst. (Algeria)

    2004-07-01

    Underbalanced drilling (UBD) is often undertaken in fractured reservoirs, in depleted formations that are susceptible to well bore damage or mud loss, and in medium to hard rock with problematic drilling rates. UBD involves manipulating the bottom hole circulating pressure so that it will be less than the static reservoir pressure, allowing formation fluids to flow into the well. UBD has increased profits at several oil and gas drilling properties including the Hassi Messaoud Field in Algeria where Sonatrach conducted trials in depleted oil production zones to assess the operational feasibility and commercial benefits of UBD. The technique was found to prevent lost circulation and differential pipe sticking; improve penetration rates; provide real-time reservoir evaluation while drilling; eliminate well stimulation costs; and, improve well bore productivity as a result of reduced formation damage. UBD also provides access to reserves that would otherwise not be produced, and substantially reduces total drilling and completion costs. 3 refs., 4 tabs., 9 figs.

  16. Geothermal well drilling manual at Cerro Prieto

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez P., A.; Flores S., M.

    1982-08-10

    The objective of the drilling manual is to solve all problems directly related to drilling during the construction of a well. In this case, the topics dealt which are drilling fluids and hydraulics to be applied in the field to improve drilling progress, eliminate risks and achieve good well-completion. There are other topics that are applicable such as drill bits and the drilling string, which are closely linked to drilling progress. On this occasion drilling fluid and hydraulics programs are presented, in addition to a computing program for a Casio FX-502P calculator to be applied in the field to optimize hydraulics and in the analysis of hydraulics for development and exploration wells at their different intervals.

  17. China's First Extra-deep Horizontal Well Drilled in Tarim

    Institute of Scientific and Technical Information of China (English)

    1997-01-01

    @@ A high-yield commercial oil/gas flow with daily output of 168 cum of crude oil and 1.08 million cum of natural gas was obtained from Tarim exploration region on May 4, 1997 after its secondary test in Well Jiefang 128. This well is highly difficult to be drilled in the world.

  18. Drilling fluids engineering to drill extra-heavy oil reservoir on the Orinoco Oil Belt, eastern Venezuela

    Energy Technology Data Exchange (ETDEWEB)

    Pino, R.; Gonazalez, W. [Proamsa, Maturin, Monagas (Venezuela)

    2008-07-01

    Petrocedeno is an exploration and development company operating in Venezuela. As part of a multidisciplinary group, Proamsa has been working with Petrocedeno to drill horizontal wells while minimizing issues related to the handling of drilling fluids. Proamsa is the only 100 per cent Venezuelan Company involved in drilling extra-heavy oil wells. The drilling plan for Petrocedeno was divided into two campaigns. More than 400 horizontal wells were drilled during the first campaign from 1999 to 2003 which represented over 2,500,000 drilled feet into the Oficina Formation (pay zone of the field). From 2006, during the second drilling campaign, and another 154 horizontal wells having been drilled until 2006 utilizing the xantam gum viscoelastic fluid. This paper discussed the field geology of the Orinoco oil belt. Well design was also explained and discussed and drilling fluid design and new fluid formations were presented. The benefits of xantam gum viscoelastic fluid were also discussed. It was concluded that recycling of drilling fluid from well to well minimized volume and reduced costs. In addition, centrifugation of drilling fluids either on intermediate or horizontals sections while the rig was skidding was always a very good practice avoiding mixing additional volumes. It was also demonstrated that the initial idea to provide a drilling fluid service company with a 100 per cent national value was a success, as demonstrated by the high performance shown by Proamsa during the second drilling campaign with external technologic support. 6 refs., 4 tabs., 4 figs.

  19. Producing oil wells; A steep downhill road

    Energy Technology Data Exchange (ETDEWEB)

    1990-02-01

    This paper discusses the effects of the drilling collapse of the past few years. Even with improved and relatively stable pricing, the severely impeded drilling climate-coupled with the continued decline of marginal wells-has caused a drop of 3.2{percent} in the total number of producing oil wells. Based on an annual survey of state and regional petroleum agencies, World Oil estimates that 603,365 oil wells are currently producing in the United States.

  20. A systematic approach for wellbore drilling and placement of SAGD well pairs and infill wells

    Energy Technology Data Exchange (ETDEWEB)

    Illfelder, H.; Forbes, E.; McElhinney, G.; Rennie, A. [PathFinder, A Schlumberger Company (Canada); Schaepsmeyer, H.; Krawchuk, A. [Cenovus Energy Incorporated (Canada)

    2011-07-01

    In Alberta, Canada, steam assisted gravity drainage (SAGD) is used to enhance oil recovery in heavy oil reservoirs. This process requires the drilling of producer and injector wells which is usually done using standard techniques. These techniques lead to sub-optimal well-placement and thus this paper aims to define a systematic approach for the drilling process. Several methods to improve the drilling process are demonstrated including careful control of the directional drilling process, borehole tortuosity minimization and producer and injector wellbore placement. The paper also presents the real-time analysis of the drilling and advanced ranging (RADAR) system, a service brand and platform developed for implementing the improved methods while drilling is in progress. This paper develops a systematic approach to placing SAGD wells in an improved manner and presents the RADAR system which allows the application of these methods.

  1. Optimizing Geothermal Drilling: Oil and Gas Technology Transfer

    Energy Technology Data Exchange (ETDEWEB)

    Tilley, Mitch; Eustes, Alfred; Visser, Charles; Baker, Walt; Bolton, Dan; Bell, Jason; Nagandran, Uneshddarann; Quick, Ralph

    2015-01-26

    There is a significant amount of financial risk associated with geothermal drilling; however, there are opportunities to improve upon current practices and technologies used. The scope of this drilling operational study included 21 geothermal wells and 21 oil and gas wells. The goal was to determine a 'perfect well' using historical data to compare the best oil and gas well to the best geothermal well. Unfortunately, limitations encountered in the study included missing data (bit records, mud information, etc.), poor data collection, and difficult to ascertain handwriting. An online software database was used to format drilling data to IADC coded daily drilling reports and generate analysis figures. Six major issues have been found in geothermal drilling operations. These problems include lost circulation, rig/equipment selection, cementing, penetration rate, drilling program, and time management. As a result of these issues, geothermal drilling averages 56.4 days longer than drilling comparable oil and gas wells in the wells in this study. Roughly $13.9 million would be lost due to non-productive time in the 21 geothermal wells and only $1.3 million in the oil and gas wells, assuming a cost of $50,000 per day. Comparable events such as drilling the same sized hole, tripping in/out, cementing, and running the same size casing took substantially less time in the oil and gas wells. Geothermal wells were drilled using older and/or less advanced technology to depths less than 10,000 feet, while oil and gas wells reached 12,500 feet faster with purpose built rigs. A new approach is now underway that will optimize drilling programs throughout the drilling industry. It is the use of Mechanical Specific Energy (MSE) as a tool to realize efficient drilling processes. However, a work-flow must also be established in order for there to be an efficient drilling program. Potential improvements for current geothermal operations are: the use of electronic records, real

  2. Real-Time Simulation of Oil Drilling Operations

    Directory of Open Access Journals (Sweden)

    Jørgen Opdal

    1982-01-01

    Full Text Available This paper contains the basic numeric model for the oil drilling simulator WELLSIM. As a case study it presents an example from well pressure control. Figure 1 shows a picture of the simulator.

  3. THE ANALYSIS OF MATHEMATICAL MODELS OF MECHANICAL SPEED OF DRIVING FOR OPTIMIZATION OF PROCESS OF DRILLING OF OIL AND GAS WELLS

    Directory of Open Access Journals (Sweden)

    Tsоuprikov A. A.

    2015-03-01

    Full Text Available The analysis of models is carried out from a definition position for system of optimum control of drilling of basic mathematical model on which calculation of optimum regime parameters is possible. The main equation for management of process of drilling of wells is the mathematical model of mechanical speed of a driving as function from axial load of a chisel, the speed of rotation of a chisel and a consumption of boring solution for cleaning of a well of destroyed breed. Key parameter is axial load of a chisel; graphically dependence of speed of drilling on loading has S appearance - a figurative curve of Bingham which has a convex mathematical extremum. In the article, domestic and foreign models of drilling are considered; their schedules according to skilled data of conducting of wells are constructed. Models are sedate, i.e. reflect only a linear site of a curve of Bingham, data of trade drilling is well approximated with initial and linear sites of curves. Thus, on them it is possible to make only rational management of process, and the optimum mode exists only on border of range of definition of function. Only the A.A. Pogarsky model is suitable for optimum control, having a mathematical maximum and S-shaped form of a curve. All models depend on two parameters of management – load of a chisel and speeds of rotation of a chisel and don't consider the third on influence on drilling speed parameter - a consumption of boring solution. Therefore, Pogarsky's model was finished by inclusion in it in an explicit form of a consumption of boring solution. Check of model by means of the regression analysis of skilled data of drilling from official reports of drilling foremen showed its reliability for 71-99%. The model allows carrying out optimum control of drilling in the "axial load of a chisel" parameter

  4. HORIZONTAL WELL DRILL-IN FLUIDS

    Directory of Open Access Journals (Sweden)

    Nediljka Gaurina-Međimurec

    1998-12-01

    Full Text Available Main objective of horizontal driling is to place a drain-hole for a long distance within the pay zone to enhance productivity or injectivity. In drilling horizontal wells, more serious problems appear than in drilling vertical wells. These problems are: poor hole cleaning, excessive torque and drag, hole filling, pipe stucking, wellbore instability, loss of circulation, formation damage, poor cement job, and difficulties at logging jobs. From that reason, successful drilling and production of horizontal well depends largely on the fluid used during drilling and completion phases. Several new fluids, that fulfill some or all of required properties (hole cleaning, cutting suspension, good lubrication, and relative low formation damage, are presented in this paper.

  5. Clay-Free Oil Based Drilling Fluid Technology for Shale Gas Horizontal Wells in the Changning Block%长宁区块页岩气水平井无土相油基钻井液技术

    Institute of Scientific and Technical Information of China (English)

    凡帆; 王京光; 蔺文洁

    2016-01-01

    针对四川长宁区块页岩气水平井应用的有土相油基钻井液存在的流变性差、易诱发井漏等技术难题,开展了无土相油基钻井液技术研究。为提高油基钻井液的电稳定性和悬浮性,研制了复合型乳化剂G326和油溶性聚合物增黏剂G336,并确定了无土相油基钻井液配方。室内试验结果表明,与有土相油基钻井液相比,无土相油基钻井液具有更强的电稳定性和更低的终切力,有利于预防高密度条件下油基钻井液的稠化和复杂地层漏失问题。无土相油基钻井液在长宁区块某平台4口页岩气水平井进行了现场应用,这4口井井壁稳定,无缩径无掉块,起下钻畅通,井眼始终处于良好净化状态,平均机械钻速提高37.8%。研究结果表明,无土相油基钻井液解决了传统高密度油基钻井液因结构强度大而易诱发井漏的问题,满足了长宁区块页岩气水平井安全快速钻井的需要。%Due to fact that the conventional clay oil based drilling fluid used in shale gas horizontal wells in the Changning Block ,Sichuan Basin ,is poor in rheology and easy to induce lost circulation ,the clay‐free oil based drilling fluid has been studied .To enhance the electric stability and suspension perform‐ance of the proposed oil based drilling fluid ,the composite emulsifier G326 and oil‐soluble polymer viscosi‐fier G336 were developed ,and determined the formula for the clay‐free oil based drilling fluid .Indoor test results showed that the clay‐free oil based drilling fluid had a higher electric stability and lower final gel strength than conventional clay oil based drilling fluids ,which is faverable for eliminating the thickening problem of oil based drilling fluids and lost circulation in complicated formations in the case of high densi‐ty .When the clay‐free oil based drilling fluid was deployed in four shale gas horizontal wells in the Changning Block

  6. Means of atmospheric air pollution reduction during drilling wells

    Science.gov (United States)

    Shkitsa, L.; Yatsyshyn, T.; Lyakh, M.; Sydorenko, O.

    2016-08-01

    The process of drilling oil and gas wells is the source of air pollution through drilling mud evaporation containing hazardous chemical substances. The constructive solution for cleaning device of downhole tool that contains elements covering tube and clean the surface from the mud in the process of rising from the well is offered. Inside the device is filled with magnetic fluid containing the substance neutralizing hazardous substances. The use of the equipment proposed will make it possible to avoid penetration of harmful substances into the environment and to escape the harmful effects of aggressive substances for staff health and increase rig's fire safety.

  7. 三塘湖致密油长水平段水平井钻井技术%Drilling technology for horizontal well with long horizontal sectionin Santanghu tight oil reservoir

    Institute of Scientific and Technical Information of China (English)

    钱峰; 杨立军

    2014-01-01

    三塘湖盆地致密油勘探开发前景广阔,水平井技术是实现该区有效开发的重要手段。从分析三塘湖致密油水平井钻井难点出发,开展了以井身结构优化及剖面设计、个性化钻头优选、低成本高效轨迹控制、提高水平段储层钻遇率及优质高效钻井液等关键技术为核心的攻关研究,形成了适应三塘湖致密油水平井优快钻进的配套技术系列,并在芦101等5口井进行了成功推广应用,提速效果显著。%Tight oil exploration in Santanghu Basin enjoys a broad prospect, and horizontal well technology is an important means for effective development of this region. This paper started with analysis of dififculties in horizontal well drilling in Santanghu tight oil formation and carried out research on key techniques such as wellbore conifguration optimization and proifle design, speciifc drilling selection, low-cost and high-efifcient trajectory control, increasing the encountering rate of reservoirs by horizontal section and quality, and effective drilling lfuid, etc. The paper has also developed supporting technique series suitable for optimized fast drilling of tight oil horizontal wells in Santanghu Basin, which has been successfully used in ifve wells like Well Lu 101 and realized remarkable increase in drilling rate.

  8. Effects of oil and gas well-drilling fluids on the biomass and community structure of microbiota that colonize sands in running seawater.

    Science.gov (United States)

    Smith, G A; Nickels, J S; Bobbie, R J; Richards, N L; White, D C

    1982-01-01

    Well-drilling fluid and a number of the known components (barite, clay, Aldacide, Surflo, and Dowicide, were tested for effects on the biomass and community structure of the microbiota that colonize marine sands exposed for eight weeks to running ambient seawater. Shading the microbiota from light depressed the microflora without a significant effect on the biomass, while well-drilling fluids layered on the surface or mixed with the sand significantly increased a component of the bacteria and the microfauna as reflected in changes in the fatty acid composition. There were some shading effects from the surface layering of well-drilling fluids as reflected in the fatty acids from the microflora when compared to the sands mixed with well-drilling fluids. Barite had essentially no effect on the biomass or community structure while clays increased nearly all of the biomass indicators for the bacteria as well as the microfauna; the clay overlay mirrors the effect of the drilling fluids. Aldacide shifted the bacterial composition, depressing the proportions of microbes containing the cyclopropane fatty acids and the anaerobic pathways of desaturation. Concentrations of 1 and 15 microgram/L increased the bacterial biomass as reflected in the total lipid (16:0) and extractable lipid phosphate coupled with a decrease in the total microeukaryotes. Surflo increased the biomass and shifted the bacterial community structure at concentrations between 4 and 800 microgram/L. The lowest level also stimulated the microfauna. Dowicide at 100 microgram/L increased the bacteria forming cis-vaccenic acid and the microfauna similar to low concentrations of Surflo.

  9. PREFACE: Scientific and Technical Challenges in the Well Drilling Progress

    Science.gov (United States)

    2015-02-01

    The Conference "Advanced Engineering Problems in Drilling" was devoted to the 60th anniversary of the Drilling Department, Institute of Natural Resources. Today this Department is the "descendant" of two existing departments - Mining Exploration Technology and Oil and Gas Drilling. It should be mentioned that this remarkable date is associated with the first graduation class of mining engineers in "Mining Exploration Technologies", as well as the 30th anniversary of the Oil and Gas Well Drilling Department. Anniversary is an excellent occasion to remember one's historical past. At the beginning of the last century within the Tomsk Technological Institute n.a. Emperor Nikolai II the Mining Department was established which soon embraced the Obruchev-Usov Mining-Geological School. This School became the parent of mining-geological education in the Asian region of Russia, as well as the successor of mining-geological science. It was and is today one of the leading schools in the spheres of mineral resources exploration, surveying and mining. 1927 is the year of the establishment of the Department of Technology in Mineral Exploration. SibGeokom (Western-Siberia branch of the Geological Committee) under the supervision of M.A. Usov obtained the first Krelis rotary boring drill. Prior to that only the Keystone cable drilling rig was used in exploration. It was I.A. Molchanov who was responsible for the development and implementation of new technology in the field of exploration. In the yard of SibGeokom (now it is Building № 6, Usov St.) the first drilling rig was mounted. This was the beginning of the first training courses for Krelis drilling foremen under the supervision of I.A. Molchanov. In 1931 I.A. Molchanov headed the Department of Exploration which was located in Building № 6. In the outside territory of this building a drilling site was launched, including Keystone cable drilling rig, CAM-500 drilling rig and others. In the Building itself, i.e. in one study

  10. Application program of CRUST-1 10km continental scientific drilling rig in SK-2 scientific drilling well

    Science.gov (United States)

    Sun, Youhong; Gao, Ke; Yu, Ping; Liu, Baochang; Guo, Wei; Ma, Yinlong; Yang, Yang

    2014-05-01

    SK-2 Well is located in DaQing city,where is site of the largest oil field in China,Heilongjiang province, north-east of China.The objective of SK-2 well is to obtain full cores of cretaceous formation in Song Liao basin,and to build the time tunnel of Cretaceous greenhouse climate change,and to clarify the causes,processes and results of the formations of DaQing oil field. This will ensure to achieve our ultimate goals,to test the CRUST-1 drilling rig and improve China's deep scientific drilling technology,to form the scientific drilling technology,method and system with independent intellectual property rights,and to provide technical knowledge and information for China's ten kilometers super-deep scientific drilling technical resources.SK-2 Well is at 6400 meter depth, where the drilling inclination is 90 degree and the continuous coring length is 3535 meter that from 2865 to 6400 meter,the recovery rate of the core is greater or equal to 95 percent with 100 millimeters core diameter and 3.9 degree per 100 meter geothermal gradient.The CRUST-1 rig is designated with special drilling equipment for continental scientific drilling combined to the oil drilling equipment ability with advanced geological drilling technology which is highly automatic and intelligent. CRUST-1 drilling ability is 10000 meter with the maximum hook load 700 tons, the total power is 4610 Kilowatt.CRUST-1 will be integrated with a complete set of automation equipment,including big torque hydraulic top drive,high accuracy automatic drilling rod feeding system, suspended automatic drill string discharge device,hydraulic intelligent iron roughneck,and hydraulic automatic catwalk to fully meet the drilling process requirements of SK-2.Designed with advanced drilling technique for 260 degree in the bottom of SK-2 well and hard rock,including the drilling tools of high temperature hydraulic hammer,high temperature resistance and high strength aluminum drill pipe,high temperature preparation of mud

  11. THE ACTION OF OIL, GAS CONDENSATE, DRILLING CUTTINGS AND DRILLING MUD ON THE BIOTA OF THE CASPIAN SEA

    National Research Council Canada - National Science Library

    A. S. Abdusamadov; A. P. Panarin; G. S. Gorbunova; L. D. Kovalenko; B. R. Guseinova; N. V. Panarina; A. M. Dokhtukaeva; L. A. Dudurkhanova

    2012-01-01

    Conducted experimental studies on the effect of crude oil, gas condensate, drilling muds and cuttings on the zooplankton, on the plant pigments of phytoplankton, on the saprophytic microflora, as well...

  12. Shell ready to begin drilling for oil in the Arctic

    Institute of Scientific and Technical Information of China (English)

    Karl; Mathiesen

    2015-01-01

    Shell is set to restart its controversial hunt for Arctic oil,three years after the company’s last ill-fated venture north.The Polar Pioneer rig began drilling on 30July,but US safety standards have prevented the company from sinking a well deep enough to hit oil until a key safety vessel,an icebreaker called the Fennica,was in the Chukchi Sea.

  13. Drilling and well operations population data statistics

    Energy Technology Data Exchange (ETDEWEB)

    Lipscomb, A. [Phaseclever Ltd., Fareham (United Kingdom)

    1999-03-01

    The need to relate data on hydrocarbon release incidents to equipment in order to convert data from the Health and Safety Executive Offshore Division's Hydrocarbon Release Database into leak frequency is discussed. This report summarises the findings of a study analysing the results of annual surveys of drilling and well operations activities between 1992 to 1997 to obtain population data. The question of missing data is raised, and the process of conducting a consensus, non-returned questionnaires, and missing data statistics covering fixed installations, mobile jack-ups, and mobile semi-submersibles are discussed. The questionnaire, analysis methodology, and statistical tables are presented in appendices.

  14. REDUCTION OF AN ADVERSE IMPACT DURING WELL DRILLING BY MEANS OF DRILLING WASTE USAGE

    OpenAIRE

    Vladimir Sergeevich Kuznetsov; Igor Konstantinovich Suprun

    2017-01-01

    The problem of drilling waste utilisation is assumed to be resolved through the implementation of the complex of environment protection production engineering measures. This includes, firstly, the usage in the process of well drilling of drilling mud on the basis of water-soluble biodegradable polymers and a four-stage drilling mud refining system. Secondly, the usage of the well site construction with trenching for allocation of expressed bore mud and a temporary ground tank for drilling was...

  15. REDUCTION OF AN ADVERSE IMPACT DURING WELL DRILLING BY MEANS OF DRILLING WASTE USAGE

    Directory of Open Access Journals (Sweden)

    Vladimir Sergeevich Kuznetsov

    2017-03-01

    Full Text Available The problem of drilling waste utilisation is assumed to be resolved through the implementation of the complex of environment protection production engineering measures. This includes, firstly, the usage in the process of well drilling of drilling mud on the basis of water-soluble biodegradable polymers and a four-stage drilling mud refining system. Secondly, the usage of the well site construction with trenching for allocation of expressed bore mud and a temporary ground tank for drilling waste water.

  16. Management of Drilling Cuttings in Term of Volume and Economics in Oil Field

    Directory of Open Access Journals (Sweden)

    Dr. Biltayib.M.

    2016-10-01

    Full Text Available The process of drilling oil and gas wells generates large volumes of drill cuttings and spent muds. The American Petroleum Institute estimated that about 150 million barrels of drilling waste was generated yearly from onshore wells in the United States alone. Of the total drilling waste, approximately 50% is solid drilling waste. The biggest contributors of drilling wastes are drilling cuttings and mud. Reducing the drilling fluids not only it reduces the waste volume, but it also reduces the environmental effects associated with it. The main purpose of drilling waste management is to find to ways by which the generation of waste can be controlled to minimize or eliminate its negative impact on the environment. Minimizing waste is always the priority, however, it not always the most cost-effective solution. The objective of this report is t

  17. GWDC Solves World-class Drilling Bottleneck in Kenkijak Oil Field

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    @@ The news that Greatwall Drilling Company Limited (GWDC) has drilled a well with the daily oil production of more than one thousand tons spread quickly when the Well H8010 of CNPC Aktobin Oil and Gas Shareholding Company (CNPC Aktobin) in Kenkijak Oil Field in Kazakhstan produced 1,170 tons on July 1, 2004; both the employees of GWDC and CNPC Aktobin could not hold their excited feeling and cheered at such encouraging news.

  18. Drilling hazards inventory: The key to safer -and cheaper- wells

    NARCIS (Netherlands)

    Hoetz, G.; Jaarsma, B.; Kortekaas, M.

    2013-01-01

    Safety and cost control are critical success factors in the realm of drilling. Actual well costs frequently exceed planned costs due to unexpected drilling incidents related to potentially avoidable geohazards. It is estimated that - in the Netherlands on average - around 20% of drilling time is

  19. Offshore Oil Drilling: Buying Energy Independence or Buying Time?

    Science.gov (United States)

    Baird, Stephen L.

    2008-01-01

    This article addresses the issues and concerns about offshore oil drilling in the United States. The demand for energy is going up, not down, and for a long time, even as alternative sources of energy are developed, more oil will be needed. The strongest argument against drilling is that it could distract the country from the pursuit of…

  20. Steerable BHAs drill storage wells with difficult trajectories. [Bottom Hole Assembly

    Energy Technology Data Exchange (ETDEWEB)

    Gomm, H.; Peters, L. (Kavernen Bau- und Betriebs-GmbH, Hannover (Germany))

    1993-07-19

    The use of steerable downhole motor assemblies allows greater variation in well bore trajectory for drilling gas and oil storage wells in salt domes in areas with surface site restrictions. With modern directional drilling tools, the cavern wells are drilled vertically, kicked off in an S turn, and then finished with a vertical section. The last 100 m of a cavern well above the last cemented casing shoe must be vertical because of the technical demands of brining and completion. To date, Kavernen Bauund Betriebs-GmbH has successfully drilled and completed three directional cavern boreholes in Germany. These directional drilling techniques have also been used successfully for vertical boreholes with strict deviation limits. The paper describes this technology.

  1. EM Telemetry Tool for Deep Well Drilling Applications

    Energy Technology Data Exchange (ETDEWEB)

    Jeffrey M. Gabelmann

    2005-11-15

    This final report discusses the successful development and testing of a deep operational electromagnetic (EM) telemetry system, produced under a cooperative agreement with the United States Department of Energy's National Energy Technology Laboratory. This new electromagnetic telemetry system provides a wireless communication link between sensors deployed deep within oil and gas wells and data acquisition equipment located on the earth's surface. EM based wireless telemetry is a highly appropriate technology for oil and gas exploration in that it avoids the need for thousands of feet of wired connections. In order to achieve the project performance objectives, significant improvements over existing EM telemetry systems were made. These improvements included the development of new technologies that have improved the reliability of the communications link while extending operational depth. A key element of the new design is the incorporation of a data-fusion methodology which enhances the communication receiver's ability to extract very weak signals from large amounts of ambient environmental noise. This innovative data-fusion receiver based system adapts advanced technologies, not normally associated with low-frequency communications, and makes them work within the harsh drilling environments associated with the energy exploration market. Every element of a traditional EM telemetry system design, from power efficiency to reliability, has been addressed. The data fusion based EM telemetry system developed during this project is anticipated to provide an EM tool capability that will impact both onshore and offshore oil and gas exploration operations, for conventional and underbalanced drilling applications.

  2. Geodatabase of Wyoming statewide oil and gas drilling activity to 2010

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Wyoming statewide oil and gas wells feature class was developed to provide a historical perspective of drilling activity for the Wyoming Landscape Conservation...

  3. Evaluation of polymers of different degrees viscosities as additives for drilling fluids for oil well; Avaliacao de polimeros de diferentes graus de viscosidades como aditivos para fluidos de perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Farias, K.V.; Amorim, L.V.; Silva, A.V. [Universidade Federal de Campina Grande (DEMa/UFCG), PB (Brazil); Lira, H.L. [Universidade Federal de Campina Grande (CCT/UFCG), PB (Brazil). Centro de Ciencias e Tecnologia. Unidade Academica de Engenharia de Materiais], e-mail: kassiefarias@gmail.com

    2008-07-01

    The objective of this work is to study the polymers influence of different degrees of viscosity, used as viscositying and filtered reducer additives, in the rheological, filtration and lubricity properties of drilling fluids for oil wells. Were determined the rheological behavior, the apparent and plastic viscosities, the yield limit and gel force, the filtered volume and the lubricity coefficient in accordance with API standard. The fluids showed pseudoplastic behavior with properties close to the standard fluid; the increase of viscositying and filtered reducer concentrations lead to the increase of rheological properties and the filtered reducer values, from the concentration of 3,5g/350mL of water it acted as viscositying, increasing the values of apparent and plastic viscosities, yield limit and gel force, being 3,0g/350mL of water the adequate concentration of this additive, promoting better results of rheological and filtration properties. (author)

  4. Continuous circulation apparatus for air drilling well bore operations

    Energy Technology Data Exchange (ETDEWEB)

    Stallings, J.L.

    1982-02-16

    An apparatus is disclosed for maintaining a continuous supply of air pressure downhole during a well bore drilling operation, even during the addition of a pipe section to the drill string. It consists of a housing installed at the surface of the well at the position of the drilling equipment wherein the upper end of the drill string is separated from the drive mechanism in order that a new piece of drill pipe may be added to the drill string, a flapper or closure member pivotally secured within the housing normally held in an open position by the outer periphery of the drill string and spring urged in a direction toward the open end of the sleeve through which the drive mechanism passes when the drive mechanism has been backed off or removed for the addition of a section of pipe to the drill string, and a by-pass line in communication with the interior of the housing for directing air pressure from the air supply to the housing when the flapper member is in the closed position whereby the air pressure may be circulated downwardly through the drill string for maintaining the air circulation downhole during the entire drilling operation.

  5. Resonant acoustic transducer system for a well drilling string

    Science.gov (United States)

    Kent, William H.; Mitchell, Peter G.

    1981-01-01

    For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.

  6. KL2-H1水平井高密度饱和盐水混油钻井液技术%High Density Saturated Saltwater Drilling Fluid with Oil for Horizontal Well KL2-H1

    Institute of Scientific and Technical Information of China (English)

    张欢庆; 陈林; 贺文廷; 于松法; 吕志强; 刘毅; 张春鹤; 赵善波

    2009-01-01

    Well KL2-H1 is a horizontal well located in Block Kela for the West-East natural gas transmission project. The third interval of this well penetrated a high pressure salt/gypsum formation and the fourth penetrated a high pressure dolomitic gas bearing zone. The density of the saltwater drilling fluid used was 2.00~2.25 g/cm,weighted only with barite because of the use of POWVER/MWD in drilling operation, and the kill mud had a density of 2.40 g/cm. The mud also had 10%~5% oil mixed in it. Bad rheology of the mud made field operation very tough. The drilling fluid and kill mud were then changed to a high density saturated saltwater fluids that were weighted with barite. Laboratory experiment and field applica-tion results showed that the drilling fluid and the kill mud met the requirements of filed operation.%KL2-H1井是西气东输2007年在克拉区块的一口水平井.该井三开段为高压盐膏层,四开段为白云岩高压气层;钻井液密度为2.00~2.25 g/cm,压井液密度为2.40 g/cm,使用混10%~15%原油基液,固相含量相对高,且容量限低,同时由于带POWVER或MWD定向工具钻进,只能使用重晶石加重,使得钻井液的流变性较差,现场施工困难.经过室内实验,研究出了一套适用于现场要求和用重晶石加重的流变性较好的高密度饱和盐水钻井液和压井液配方.现场应用表明,该钻井液的各项性能均能很好地满足钻进要求.

  7. Development and Achievements of Drilling Techniques in Sichuan Oil Province

    Institute of Scientific and Technical Information of China (English)

    Xia Shuming; Cheng Changxiu

    1995-01-01

    @@ Drilling Techniques Design methods for special wellbore structure The wellbore structure which suits all of the complicated conditions can be designed by special methods.The shut-in pressure is high when gas well is under well control and ell testing, in order to raise the pressure resistant capacity of the casing,and to control oil/gas pressure effectively,not only the inside compression strcngth and scaling property of the casing should be enhanced,but also the cement slurry should be retumed to the surface during each cementing job.

  8. Geothermal well technology: drilling and completions program plan

    Energy Technology Data Exchange (ETDEWEB)

    Newsom, M.M.; Barnett, J.H.; Baker, L.E.; Varnado, S.G.; Polito, J.

    1978-03-01

    The drilling and completion portion of the long-range Geothermal Well Technology Program is presented. A nine-year program is outlined based upon an objective of reducing the cost of geothermal energy development and providing a major stimulus to meeting the power-on-line goals established by the Department of Energy. Major technological challenges to be addressed in this program include improvements in geothermal drilling fluids, downhole drilling motors, rock bits and the development of high flow rate, high temperature completion and reinjection techniques. In addition, fundamental studies will be conducted in drilling energetics to improve the understanding of drilling mechanics. This will lead to advanced development of high performance, low cost geothermal drilling systems.

  9. Water-based inhibitive drilling fluids for oil wells: preliminary study; Fluidos aquosos inibidos para perfuracao de pocos de petroleo: estudo preliminar

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Kassie V.; Amorim, Luciana V.; Silva, Aline R.V.; Ferreira, Heber C. [Universidade Federal de Campina Grande (UFCG), PB (Brazil)

    2008-07-01

    The aim of this work is to do formulations of water-based inhibitive drilling fluids and to evaluate their rheologic, filtration and lubrication properties and the degree of swell of clays. It was studied eight formulations containing the following additives: viscosity, filtered reducer, controlling of pH, hydratable clays inhibitors, anti-foamy, bactericide, lubricant and sealant. The fluids were prepared according to the field practice that consists of adding to water the additives under constant agitation. After 24 h resting, it was carried out a study of the rheologic behavior, in a Fann 35 A viscosimeter, and of the filtration properties in a Fann press-filter and of lubricity in a Ofite Lubricity tester through the determination of the flow curves, apparent and plastic viscosities, yield limit, gel force, filtered volume, filter-cake thickness and lubricity coefficient. It was also been essays to evaluate the capacity of inhibition of clay with the chemical inhibitors isolated and in set. The results had proven that the presence of inhibitor of clay in drilling fluids has great importance and promotes the inhibition of the swell of clay in all concentrations studied and amongst the formulations developed, six had presented performance next to the fluid Standard. (author)

  10. 30 CFR 203.40 - Which leases are eligible for royalty relief as a result of drilling a deep well or a phase 1...

    Science.gov (United States)

    2010-07-01

    ... REDUCTION IN ROYALTY RATES OCS Oil, Gas, and Sulfur General Royalty Relief for Drilling Deep Gas Wells on... a result of drilling a deep well or a phase 1 ultra-deep well? 203.40 Section 203.40 Mineral... a result of drilling a deep well or a phase 1 ultra-deep well? Your lease may receive an RSV...

  11. The economics of allowing more U.S. oil drilling

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, Robert [University of Manchester (United Kingdom); Smith School University of Oxford (United Kingdom); Georgetown Center for Business and Public Policy (United States); Passell, Peter [Milken Institute (United States)

    2010-05-15

    This paper examines the likely impact of developing U.S. energy resources on oil prices. In addition, we examine the benefits and costs of allowing drilling in the Arctic National Wildlife Refuge and the areas of the Outer Continental Shelf that were until recently closed to drilling. We find that allowing oil drilling in ANWR and the off-limits OCS would be likely to have a very modest impact on oil prices - on the order of 1%. However, a benefit-cost analysis of developing ANWR and off-limits OCS suggests that the benefits are likely to exceed the costs. (author)

  12. Development and application of the capacity to make tests of dynamic displacement in samples of oil well drilling cores; Desarrollo y aplicacion de la capacidad para realizar pruebas de desplazamiento dinamico en muestras de nucleos de perforacion de pozos petroleros

    Energy Technology Data Exchange (ETDEWEB)

    Contreras L, Enrique; Garcia M, Pablo [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2001-07-01

    In the Laboratory of Deposits of the Gerencia de Geotermia of the Instituto de Investigaciones Electricas (IIE) the capacity has been developed to make tests of dynamic oil displacement by means of gas or brine injection in samples of oil well drilling cores. Also the methodologies to interpret the results of these tests in terms of dynamics and the efficiency of the oil recovery in terms of the relative permeability have been developed. These capacities represent a very important contribution towards the improvement of the insufficiency that exists in the country to make the large amount of tests of dynamic displacement that demand the different Actives of PEMEX Exploration and Production (PEP), since they satisfy their necessities of data on which the activities of design and implementation of the most suitable techniques for the hydrocarbon recovery of the oil deposits lean. In the present work these capacities are described and some examples are presented of the results that have been obtained from their application in special studies of drilling cores, which have been recently made in the Laboratory of Deposits of the IIE for diverse Actives of PEP exploitation. [Spanish] En el laboratorio de yacimientos de la Gerencia de Geotermia del Instituto de Investigaciones Electricas (IIE) se ha desarrollado la capacidad de realizar pruebas de desplazamiento dinamico de aceite mediante inyeccion de salmuera o de gases en muestras de nucleos de perforacion de pozos petroleros. Tambien se han desarrollado las metodologias para interpretar los resultados de estas pruebas en terminos de la dinamica y la eficiencia de la recuperacion de aceite y en terminos de la permeabilidades relativas. Estas capacidades representan una contribucion muy importante hacia el mejoramiento de la insuficiencia que existe en el pais para realizar la gran cantidad de pruebas de desplazamiento dinamico que demandan los diferentes activos de explotacion de PEMEX Exploracion y Produccion (PEP), ya

  13. Horizontal drilling methods proven in three test wells

    Energy Technology Data Exchange (ETDEWEB)

    Dorel, M.

    1983-05-01

    The practice of drilling horizontally through a reservoir by deviating the wellbore 90/sup 0/ from vertical requires precise planning and sound engineering practices. This article takes a look at the operational, engineering and planning aspects of three successfully drilled drainholes. It also presents a field-tested horizontal well logging procedure that may help extend and improve this technology.

  14. Desenvolvimento de fluidos aquosos com bentonita para perfuração de poços de petróleo onshore Development of aqueous fluids with bentonite clay for drilling of onshore oil wells

    Directory of Open Access Journals (Sweden)

    R. C. A. M Nascimento

    2010-06-01

    Full Text Available Devido aos grandes desafios encontrados na perfuração de poços, há a necessidade de se desenvolver fluidos com propriedades adequadas e capazes de atender todas as exigências da perfuração, como elevada capacidade de carreamento de sólidos e alta lubricidade, como também fluidos ambientalmente corretos. O grau de impacto dos fluidos de perfuração no meio ambiente depende especialmente do tipo de fluido utilizado, se de base aquosa, oleosa, sintética ou mesmo de base ar. Portanto, é de fundamental importância o desenvolvimento de fluidos com características específicas em cada etapa da perfuração. Sendo assim, este trabalho objetivou o desenvolvimento de fluidos aquosos, com baixo teor de sólidos e propriedades reológicas, de filtração e lubricidade adequadas à perfuração de poços de petróleo onshore. Os fluidos foram formulados utilizando em sua composição bentonita sódica industrializada, aditivos poliméricos e lubrificantes, em diferentes concentrações. O estudo reológico, de filtração e lubricidade mostrou que os fluidos apresentam comportamento pseudoplástico e que os aditivos selecionados desempenham com êxito suas funções de modificadores reológicos, redutores de filtrado e agente lubrificante. Além disto, ficou evidenciada a necessidade de aditivos lubrificantes em fluidos aquosos contendo argila bentonítica e polímeros. A adição de 1% de lubrificante no fluido é suficiente para adequar a capacidade lubrificante dos fluidos.Due to challenges encountered in drilling wells, there is a need to develop fluids that have properties suitable and able to meet all the requirements of drilling, such as, high capacity for carrying of solid and high lubricity. Besides that, they need to be environmentally friend. The degree of impact of drilling fluids in the environment depends on the type of fluid used, if water or oil or synthetic or air based. It is therefore of fundamental importance to develop

  15. THE ACTION OF OIL, GAS CONDENSATE, DRILLING CUTTINGS AND DRILLING MUD ON THE BIOTA OF THE CASPIAN SEA

    Directory of Open Access Journals (Sweden)

    A. S. Abdusamadov

    2012-01-01

    Full Text Available Conducted experimental studies on the effect of crude oil, gas condensate, drilling muds and cuttings on the zooplankton, on the plant pigments of phytoplankton, on the saprophytic microflora, as well as on representatives of ichthyofauna of the Caspian sea.

  16. Rapid Growth in China's Oil & Gas Drilling Equipment Exports

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ China's exports of oil and gas drilling equipment rose to 500 million dollars in 2005 from less than 200 dollars in 2002 for its rapid growth of manufacturing such equipment from the start of 2005, with an annual increment of 26.1 percent. Exports of oil and gas drilling equipment with different types at Shanghai port reached 140 million dollars in the first half of 2006, 3.1 times higher than the same period of last year.

  17. Cleaning oil sands drilling waste in Alberta

    Energy Technology Data Exchange (ETDEWEB)

    Mikic, N.; Nilsen, C.; Markabi, M. [Mi SWACO, Calgary, AB (Canada)

    2008-07-01

    The waste generated from steam assisted gravity drainage (SAGD) wells is brought to the surface and separated by shale shakers. The waste can include drilling fluids and sand contaminated with bitumen. This paper described a new technology developed to treat waste using the addition of hot water and various mixing and separation technologies to reduce the viscosity of the bitumen and separate it from the sand. The bitumen-contaminated drill cuttings were mixed with hot water to form a slurry that was then separated through the G-force created by a hydrocyclone. A secondary separation was then conducted in an elutriation column to remove residual contaminants from the sand. The flow rate of the process was controlled by the fine solids composition of the cuttings, the temperature of the cleaning process, and the performance of the individual components. Laboratory tests conducted to tests the method showed that the sand particles produced using the method were clean enough to be safely disposed in the environment. A pilot study will be conducted to test the sand cleaning technology at a commercial scale. 6 refs., 3 figs.

  18. Comments on some of the drilling and completion problems in Cerro Prieto geothermal wells

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez A, B.; Sanchez G, G.

    1981-01-01

    From 1960 to the present, 85 wells with a total drilling length exceeding 160,000 m have been constructed at Cerro Prieto, a modest figure compared to an oil field. This activity took place in five stages, each characterized by changes and modifications required by various drilling and well-completion problems. Initially, the technical procedures followed were similar to those used in the oil industry. However, several problems emerged as a result of the relatively high temperatures found in the geothermal reservoir. The various problems that have been encountered can be considered to be related to drilling fluids, cements and cementing operations, lithology, geothermal fluid characteristics, and casings and their accessories. As the importance of high temperatures and the characteristics of the geothermal reservoir fluids were better understood, the criteria were modified to optimize well-completion operations, and satisfactory results have been achieved to date.

  19. Modeling of oil mist and oil vapor concentration in the shale shaker area on offshore drilling installations.

    Science.gov (United States)

    Bråtveit, Magne; Steinsvåg, Kjersti; Lie, Stein Atle; Moen, Bente E

    2009-11-01

    The objective of this study was to develop regression models to predict concentrations of oil mist and oil vapor in the workplace atmosphere in the shale shaker area of offshore drilling installations. Collection of monitoring reports of oil mist and oil vapor in the mud handling areas of offshore drilling installations was done during visits to eight oil companies and five drilling contractors. A questionnaire was sent to the rig owners requesting information about technical design of the shaker area. Linear mixed-effects models were developed using concentration of oil mist or oil vapor measured by stationary sampling as dependent variables, drilling installation as random effect, and potential determinants related to process technical parameters and technical design of the shale shaker area as fixed effects. The dataset comprised stationary measurements of oil mist (n = 464) and oil vapor (n = 462) from the period 1998 to 2004. The arithmetic mean concentrations of oil mist and oil vapor were 3.89 mg/m(3) and 39.7 mg/m(3), respectively. The air concentration models including significant determinants such as viscosity of base oil, mud temperature, well section, type of rig, localization of shaker, mechanical air supply, air grids in outer wall, air curtain in front of shakers, and season explained 35% and 17% of the total variance in oil vapor and oil mist, respectively. The developed models could be used to indicate what impact differences in technical design and changes in process parameters have on air concentrations of oil mist and oil vapor. Thus, the models will be helpful in planning control measures to reduce the potential for occupational exposure.

  20. 探究海油陆采丛式井组优快钻井技术%Optimized fast drilling of cluster wells at onshore-platform for offshore oil recovery

    Institute of Scientific and Technical Information of China (English)

    朱博; 陈茜

    2015-01-01

    本文首先简单介绍了垦东12区海油陆采钻井施工中存在的难点,然后提出了相应的解决措施,旨在为后期滩浅海油区的发展提供一定的参考.%The difficulties in drilling and construction at onshore-platform for offshore oil recovery in Kendong-12 area are introduced in this paper to provide solutions for later development of shallow oil zone.

  1. Drilling and Completion of the Urach III HDR Test Well

    Energy Technology Data Exchange (ETDEWEB)

    Meier, U.; Ernst, P. L.

    1981-01-01

    The hot dry rock (HDR) test well, urach III, was drilled and completed in 1979. The borehole is located in Southwest Germany in the geothermal anomaly of Urach. The purpose of project Urach was to study drilling and completion problems of HDR wells and to provide a test site for a HDR research program. The Urach III borehole was drilled to a total depth of 3,334 meters (10,939 feet), penetrating 1,700 meters (5,578 feet) into the granitic basement. Extensive coring was required to provide samples for geophysical and geochemical studies. Positive displacement downhole motors were used for coring and normal drilling operations. It was found that these motors in combination with the proper bits gave better results than conventional rotary drilling. Loss of circulation was encountered not only in sedimentary rocks but also in the granite. After drilling and completion of the borehole, a number of hydraulic fracturing experiments were performed in the open hole as well as in the cased section of Urach III. A circulation loop was established by using the single-borehole concept. It is not yet clear whether new fractures have actually been generated or preexisting joints and fissures have been reactivated. Evaluation of the results of this first step is almost completed and the planning of Phase II of the Urach project is under way.

  2. Effects of Drilling Fluid Exposure to Oil and Gas Workers Presented with Major Areas of Exposure and Exposure Indicators

    Directory of Open Access Journals (Sweden)

    Eric Broni-Bediako

    2010-12-01

    Full Text Available Drilling fluid is any fluid which is circulated through a well in order to remove cuttings from a wellbore. They are used broadly in the oil and gas industry, on exploration rigs, and are critical to ensuring a safe and productive oil or gas well. During drilling, a large volume of fluids are circulated through the well and into open, partially enclosed or completely enclosed systems at elevated temperatures. When these drilling fluids are agitated during circulating process there is significant potential for chemical exposure to workers and subsequent health effects. This study seeks to identify major areas of drilling fluid exposure and health hazard associated with the use of drilling fluid. The study also presents some challenges in setting drilling fluid exposure standard which has always not been given the same attention or concern as effects and risk management of drilling fluid. Some exposure indicators are also presented.

  3. Oil Well Top Hole Locations, DNROilGasHD_Path-Utah Oil and Gas Well Horizontal drill paths. From the Utah Department of Natural Resources, Oil Gas and Mining Division. http://ogm.utah.gov, Published in 2007, 1:100000 (1in=8333ft) scale, State of Utah Automated Geographic Reference Center.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, published at 1:100000 (1in=8333ft) scale, was produced all or in part from Other information as of 2007. It is described...

  4. A Promising Material by Using Residue Waste from Bisphenol A Manufacturing to Prepare Fluid-Loss-Control Additive in Oil Well Drilling Fluid

    Directory of Open Access Journals (Sweden)

    Zhi-Lei Zhang

    2013-01-01

    Full Text Available The residues mixture from Bisphenol A manufacturing process was analyzed. Fourier transform infrared (FTIR spectroscopy, gas chromatography-mass spectrometry (GC-MS, and nuclear magnetic resonance (NMR were used to characterize the residues. The results indicated that the residues were complex mixture of several molecules. 3-(2-Hydroxyphenyl-1,1,3-trimethyl-2,3-dihydro-1H-inden-5-ol and phenol were the main components of the residues. The technical feasibility of using it as phenol replacement in fluid-loss-control additive production was also investigated. The fluid-loss-control capacity of the novel additive was systematically investigated. It was discovered that the well fluid-loss performance of the prepared additive can be achieved, especially at high temperature.

  5. Drilling mud additive for the release of jammed drill pipes in a well bore. Additiv for tilsetning til boreslam, eller for frigjoering av fastkjoerte boreroer i et borehull og anvendelse av additivet for disse formaal

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, d.E.; Mouten, R.J.; Moecek, C.J.

    1986-04-21

    The invention concerns a drilling mud additive to release jammed drill pipes in a well bore. The additive is a mixture of imideazolene/amide, diethanolamide, tall oil fatty acids, and a non-polluting/biodegradable - and non-fluorescent oil.

  6. Importance of the planning activities, cutting, handling and analysis of the nuclei of oil well drilling; Importancia de las actividades de planificacion, corte, manejo y analisis de los nucleos de perforacion de pozos petroleros

    Energy Technology Data Exchange (ETDEWEB)

    Contreras L, Enrique A; Garcia M, Pablo [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2007-07-01

    In the geologic formation where the oil deposits are located, diverse types of rocks perform functions as structural elements, storage containers for hydrocarbon water and calorific energy, as well as impermeable barriers and transport means of the energy and the fluids. Among the most important properties that are used to describe these functions are the porosity, the permeability, the compressibility of the pores volume, the formation resistivity factor, the saturation exponent, the velocity of acoustic waves P and S, the relative permeability, the capillary pressures, the elastic constants and other mechanical properties, the thermal expansion, coefficient, the thermal conductivity, the thermal diffusivity and the specific heat. The execution of an ample variety of activities related to the stages of exploration, location, evaluation and development of the oil deposits, depends strongly on having a good knowledge of the magnitude and the spatial variability of these properties. The technical feasibility as well as the economics in developing a prospectus of oil deposit, depends on that the intervening rocks exhibit a suitable combination of their properties, thus constituting a confining and storing geologic structure of hydrocarbons that is feasible to be developed technically, at the same time of having the economic potential of yielding an economic benefit. In this context, from the experience platform on the subject existing in the Laboratorio de Yacimientos of the Instituto de Investigaciones Electricas. The present article approaches the relevance which have the activities of cutting, handling and laboratory analysis of the oil well drilling nuclei, for the geologic evaluation of the formation, in relation to the characterization, the evaluation and the advantage of the oil deposits. [Spanish] En las formaciones geologicas donde se encuentran emplazados los yacimientos petroleros, diversos tipos de rocas desempenan funciones como elementos estructurales

  7. Solicitation - Geothermal Drilling Development and Well Maintenance Projects

    Energy Technology Data Exchange (ETDEWEB)

    Sattler, A.R.

    1999-07-07

    Energy (DOE)-industry research and development (R and D) organization, sponsors near-term technology development projects for reducing geothermal drilling and well maintenance costs. Sandia National Laboratories (Albuquerque, NM) administers DOE funds for GDO cost-shared projects and provides technical support. The GDO serves a very important function in fostering geothermal development. It encourages commercialization of emerging, cost-reducing drilling technologies, while fostering a spirit of cooperation among various segments of the geothermal industry. For Sandia, the GDO also serves as a means of identifying the geothermal industry's drilling fuel/or well maintenance problems, and provides an important forum for technology transfer. Successfully completed GDO projects include: the development of a high-temperature borehole televiewer, high-temperature rotating head rubbers, a retrievable whipstock, and a high-temperature/high-pressure valve-changing tool. Ongoing GDO projects include technology for stemming lost circulation; foam cement integrity log interpretation, insulated drill pipe, percussive mud hammers for geothermal drilling, a high-temperature/ high-pressure valve changing tool assembly (adding a milling capability), deformed casing remediation, high- temperature steering tools, diagnostic instrumentation for casing in geothermal wells, and elastomeric casing protectors.

  8. Influence of the drilling mud formulation process on the bacterial communities in thermogenic natural gas wells of the Barnett Shale.

    Science.gov (United States)

    Struchtemeyer, Christopher G; Davis, James P; Elshahed, Mostafa S

    2011-07-01

    The Barnett Shale in north central Texas contains natural gas generated by high temperatures (120 to 150°C) during the Mississippian Period (300 to 350 million years ago). In spite of the thermogenic origin of this gas, biogenic sulfide production and microbiologically induced corrosion have been observed at several natural gas wells in this formation. It was hypothesized that microorganisms in drilling muds were responsible for these deleterious effects. Here we collected drilling water and drilling mud samples from seven wells in the Barnett Shale during the drilling process. Using quantitative real-time PCR and microbial enumerations, we show that the addition of mud components to drilling water increased total bacterial numbers, as well as the numbers of culturable aerobic heterotrophs, acid producers, and sulfate reducers. The addition of sterile drilling muds to microcosms that contained drilling water stimulated sulfide production. Pyrosequencing-based phylogenetic surveys of the microbial communities in drilling waters and drilling muds showed a marked transition from typical freshwater communities to less diverse communities dominated by Firmicutes and Gammaproteobacteria. The community shifts observed reflected changes in temperature, pH, oxygen availability, and concentrations of sulfate, sulfonate, and carbon additives associated with the mud formulation process. Finally, several of the phylotypes observed in drilling muds belonged to lineages that were thought to be indigenous to marine and terrestrial fossil fuel formations. Our results suggest a possible alternative exogenous origin of such phylotypes via enrichment and introduction to oil and natural gas reservoirs during the drilling process.

  9. Experimental survey on geothermal well drilling for improvement of the drilling work efficiency. Chinetsui kussakuno noritsu kojoni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    1988-05-01

    In order to reduce the geothermal well drilling cost which amounts to 40 to 60 % of the total geothermal energy development cost, various factors relevant to the drilling operation have been extracted and examined, aiming at the reduction in the well drilling time which is the most definite factor for the well drilling cost. The following items have been studied on their current situations: drilling time analysis on 13 geothermal wells drilled by NEDO; questionare to 9 domestic geothermal developer enterprises to obtain information on their bussiness status; to investigate current activities of 5 geothermal well drilling companies in U.S.A. and Italy. Investigations of countermeasures for improving well drilling work efficiency, such as reducing the time of rig-up and rig-down, prevention and countermeasures against borehole troubles, improvement of rate of penetration have been carried out. Furthermore, investigations of organization for well drilling work such as education and training of drilling crew and secure of drilling supervisors have been conducted. Having summerized the items examined for improving the geothermal well drilling efficiency, the goals of improvement of the efficiency and the future tasks in the mainly technical aspect are extracted. Example of the content is as follows, shortening rig-up and down time set to less than 15 days for rig-up and less than 10 days for rig-down, by securing drilling site area. (50 figs, 13 tabs, 13 refs)

  10. Exposure to oil mist and oil vapour during offshore drilling in Norway, 1979-2004

    Energy Technology Data Exchange (ETDEWEB)

    Steinsvag, K.; Bratveit, M.; Moen, B.E. [University of Bergen (Norway). Dept. of Public Health and Primary Health Care

    2006-07-01

    Objectives: To describe personal exposure to airborne hydrocarbon contaminants (oil mist and oil vapour) from 1979 to 2004 in the mud-handling areas of offshore drilling facilities operating on the Norwegian continental shelf when drilling with oil-based muds. Methods: Qualitative and quantitative information was gathered during visits to companies involved in offshore oil and gas production in Norway. Monitoring reports on oil mist and oil vapour exposure covered 37 drilling facilities. Exposure data were analysed using descriptive statistics and by constructing linear mixed-effects models. Results: Samples had been taken during the use of three generations of hydrocarbon base oils, namely diesel oils (1979-1984), low-aromatic mineral oils (1985-1997) and non-aromatic mineral oils (1998-2004). Sampling done before 1984 showed high exposure to diesel vapour (arithmetic mean, AM = 1217 mg m{sup -3}). When low-aromatic mineral oils were used, the exposure to oil mist and oil vapour was 4.3 and 36 mg m{sup -3}, and the respective AMs for non-aromatic mineral oils were reduced to 0.54 and 16 mg m{sup -3}. Downward time trends were indicated for both oil mist (6% per year) and oil vapour (8% per year) when the year of monitoring was introduced as a fixed effect in a linear mixed-effects model analysis. Rig type, technical control measures and mud temperature significantly determined exposure to oil mist. Rig type, type of base oil, viscosity of the base oil, work area, mud temperature and season significantly determined exposure to oil vapour. Major decreases in variability were found for the between-rig components. Conclusions: Exposure to oil mist and oil vapour declined over time in the mud-handling areas of offshore drilling facilities. Exposure levels were associated with rig type, mud temperature, technical control measures, base oil, viscosity of the base oil, work area and season. (author)

  11. Combined Effect of Pressure and Temperature on the Viscous Behaviour of All-Oil Drilling Fluids

    Directory of Open Access Journals (Sweden)

    Hermoso J.

    2014-12-01

    Full Text Available The overall objective of this research was to study the combined influence of pressure and temperature on the complex viscous behaviour of two oil-based drilling fluids. The oil-based fluids were formulated by dispersing selected organobentonites in mineral oil, using a high-shear mixer, at room temperature. Drilling fluid viscous flow characterization was performed with a controlled-stress rheometer, using both conventional coaxial cylinder and non-conventional geometries for High Pressure/High Temperature (HPHT measurements. The rheological data obtained confirm that a helical ribbon geometry is a very useful tool to characterise the complex viscous flow behaviour of these fluids under extreme conditions. The different viscous flow behaviours encountered for both all-oil drilling fluids, as a function of temperature, are related to changes in polymer-oil pair solvency and oil viscosity. Hence, the resulting structures have been principally attributed to changes in the effective volume fraction of disperse phase due to thermally induced processes. Bingham’s and Herschel-Bulkley’s models describe the rheological properties of these drilling fluids, at different pressures and temperatures, fairly well. It was found that Herschel-Bulkley’s model fits much better B34-based oil drilling fluid viscous flow behaviour under HPHT conditions. Yield stress values increase linearly with pressure in the range of temperature studied. The pressure influence on yielding behaviour has been associated with the compression effect of different resulting organoclay microstructures. A factorial WLF-Barus model fitted the combined effect of temperature and pressure on the plastic viscosity of both drilling fluids fairly well, being this effect mainly influenced by the piezo-viscous properties of the continuous phase.

  12. The Horizontal Well Drilling Parameter Optimization Design Research

    Directory of Open Access Journals (Sweden)

    Wang Yan

    2013-07-01

    Full Text Available Extended-reach drilling technology has rapidly developed during the past three decades. It requires improved new models and technology. This study has created a rapid optimum method to design the horizontal well drilling parameters. Genetic Algorithm is applied in this method to optimize the parameters such WOB, RPM. According to practical situation, the suitable fitness function and value of operators of GA are given and reasonable convergence delay-independent conditions are set. Based on the intelligence and global quick search of GA and the convergence of GA, the design parameters can be globally optimized quickly and accurately. An example is taken to prove that the application of GA in the field of drilling parameters is successful. This optimization method based on GA can provide guide for field design.

  13. Inhibiting scale in oil wells

    Energy Technology Data Exchange (ETDEWEB)

    D' Errico, M.J.; Adler, S.F.

    1972-09-27

    An oil well treatment is described to inhibit the formation of hard scale by precipitation from the oil well brine of scale-forming water insoluble sulfate, carbonate, and other salts. The process consists of incorporating into the oil well during a fracturing treatment, a fluid containing a solid polymeric material characterized by molecular weight in the range of 1,000 to 15,000 and a substantially linear structure, derived by the linear polymerization of at least one monoolefinically unsaturated compound through the olefinically unsaturated group. The linear structure has pendent groups, 50% of which are carboxy groups, the carboxy groups being neutralized with a sufficient proportion of at least one compound having a cation of a metal selected from alkaline earth metals, chromium, aluminum, iron, cobalt, zinc, nickel or copper to render the polymer soluble in water at 25$C to a concentration of not more than 50 ppm. (8 claims)

  14. Equilibrium equations for nonlinear buckling analysis of drill-strings in 3D curved well-bores

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    With the development of drilling technology, the oil/gas well has evolved from its early vertical straight form to the inclined, horizontal, plane curved, or even 3D curved well-bore. Understanding of the buck- ling behavior of a drill-string in a well-bore is crucial for the success of a drilling operation. Therefore, equilibrium equations for analyzing the buckling behavior of a drill-string in a 3D curved well-bore are required. Based on Love’s equilibrium equations for a curved and twisted rod in space, a set of equi- librium equations for the nonlinear buckling analysis of a drill-string in a 3D curved well-bore are de- rived by introducing a radial constraint of the well-bore. The proposed formulae can account for the well curvature and tortuosity. Thus, it can be used to analyze the buckling behaviors of a drill-string constrained in a well-bore and subjected to axial compression, torsion at its upper end, and gravity simultaneously. It is worth noting that the existing equations in the literature for a drill-string in a straight and plane curved well-bore with a constant curvature are a special case of the proposed model. Thus, the present model can provide a theoretical basis for the nonlinear buckling analysis of a drill-string constrained in a 3D curved well-bore.

  15. Equilibrium equations for nonlinear buckling analysis of drill-strings in 3D curved well-bores

    Institute of Scientific and Technical Information of China (English)

    TAN MeiLan; GAN LiFei

    2009-01-01

    With the development of drilling technology, the oil/gas well has evolved from its early vertical straight form to the inclined, horizontal, plane curved, or even 3D curved well-bore. Understanding of the buck-ling behavior of a drill-string in a well-bore is crucial for the success of a drilling operation. Therefore, equilibrium equations for analyzing the buckling behavior of a drill-string in a 3D curved well-bore are required. Based on Love's equilibrium equations for a curved and twisted rod in space, s set of equi-librium equations for the nonlinear buckling analysis of a drill-string in a 3D curved well-bore are de-rived by introducing a radial constraint of the well-bore. The proposed formulae can account for the well curvature and tortuosity. Thus, it can be used to analyze the buckling behaviors of a drill-string constrained in a well-bore and subjected to axial compression, torsion at its upper end, and gravity simultaneously. It is worth noting that the existing equations in the literature for a drill-string in a straight and plane curved well-bore with a constant curvature are a special case of the proposed model. Thus, the present model can provide s theoretical basis for the nonlinear buckling analysis of a drill-string constrained in a 3D curved well-bore.

  16. 75 FR 65309 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-10-22

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department of... meeting of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the..., and mitigate the impact of, any oil spills associated with offshore drilling in the future....

  17. 75 FR 47584 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-08-06

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department of... meeting for the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the..., and mitigate the impact of, any oil spills associated with offshore drilling in the future....

  18. Propagation of Measurement-While-Drilling Mud Pulse during High Temperature Deep Well Drilling Operations

    Directory of Open Access Journals (Sweden)

    Hongtao Li

    2013-01-01

    Full Text Available Signal attenuates while Measurement-While-Drilling (MWD mud pulse is transmited in drill string during high temperature deep well drilling. In this work, an analytical model for the propagation of mud pulse was presented. The model consists of continuity, momentum, and state equations with analytical solutions based on the linear perturbation analysis. The model can predict the wave speed and attenuation coefficient of mud pulse. The calculated results were compared with the experimental data showing a good agreement. Effects of the angular frequency, static velocity, mud viscosity, and mud density behavior on speed and attenuation coefficients were included in this paper. Simulated results indicate that the effects of angular frequency, static velocity, and mud viscosity are important, and lower frequency, viscosity, and static velocity benefit the transmission of mud pulse. Influenced by density behavior, the speed and attenuation coefficients in drill string are seen to have different values with respect to well depth. For different circulation times, the profiles of speed and attenuation coefficients behave distinctly different especially in lower section. In general, the effects of variables above on speed are seen to be small in comparison.

  19. Casing pull tests for directionally drilled environmental wells

    Energy Technology Data Exchange (ETDEWEB)

    Staller, G.E.; Wemple, R.P. [Sandia National Labs., Albuquerque, NM (United States); Layne, R.R. [Charles Machine Works, Inc., Perry, OK (United States)

    1994-11-01

    A series of tests to evaluate several types of environmental well casings have been conducted by Sandia National Laboratories (SNL) and it`s industrial partner, The Charles Machine Works, Inc. (CMW). A test bed was constructed at the CMW test range to model a typical shallow, horizontal, directionally drilled wellbore. Four different types of casings were pulled through this test bed. The loads required to pull the casings through the test bed and the condition of the casing material were documented during the pulling operations. An additional test was conducted to make a comparison of test bed vs actual wellbore casing pull loads. A directionally drilled well was emplaced by CMW to closely match the test bed. An instrumented casing was installed in the well and the pull loads recorded. The completed tests are reviewed and the results reported.

  20. Recurrent oil sheens at the deepwater horizon disaster site fingerprinted with synthetic hydrocarbon drilling fluids.

    Science.gov (United States)

    Aeppli, Christoph; Reddy, Christopher M; Nelson, Robert K; Kellermann, Matthias Y; Valentine, David L

    2013-08-01

    We used alkenes commonly found in synthetic drilling-fluids to identify sources of oil sheens that were first observed in September 2012 close to the Deepwater Horizon (DWH) disaster site, more than two years after the Macondo well (MW) was sealed. While explorations of the sea floor by BP confirmed that the well was sound, they identified the likely source as leakage from an 80-ton cofferdam, abandoned during the operation to control the MW in May 2010. We acquired sheen samples and cofferdam oil and analyzed them using comprehensive two-dimensional gas chromatography. This allowed for the identification of drilling-fluid C16- to C18-alkenes in sheen samples that were absent in cofferdam oil. Furthermore, the spatial pattern of evaporative losses of sheen oil alkanes indicated that oil surfaced closer to the DWH wreckage than the cofferdam site. Last, ratios of alkenes and oil hydrocarbons pointed to a common source of oil found in sheen samples and recovered from oil-covered DWH debris collected shortly after the explosion. These lines of evidence suggest that the observed sheens do not originate from the MW, cofferdam, or from natural seeps. Rather, the likely source is oil in tanks and pits on the DWH wreckage, representing a finite oil volume for leakage.

  1. How we improved operations in drilling pre-salt wells

    Energy Technology Data Exchange (ETDEWEB)

    Hougaz, Augusto Borella [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil); Martins, Luiz Felipe; Bittencourt, Jessica Lima; Braz, Luciano Machado [Genesis do Brasil, Sao Paulo, SP (Brazil); Damski, Carlos [Genesis Petroleum Technology Pty Ltd. (GPT), Bentley, WA (Australia)

    2012-07-01

    The development of pre-salt wells offshore Brazil has been one of the most challenging projects in history of E and P. Facing water depths of 2000+ meters, a salt layer 2000 meters thick to reach reservoirs at 7000 meters below sea level, has to use technological and procedural techniques never used before. In those 2 years of exploration of those fields many technologies were tested and improved. This paper describes the systematic approach was taken to analyze, plan and follow-up the development of drilling operations campaign in those fields, and the case study of overall process improvement. The assumption was to apply a risk analysis tool which uses previous data to analyze the performance and plan future time. The goals of this process are continuous improvement of execution and process control for each operation. Looking into previous performance, new interventions were planned more accurately and further improvements were studied. The frequent follow up of the drilling intervention was done using the statistical base to compare the most recent results. At operational level it was possible to see if the last operation was done in the 1st, 2nd, 3rd or 4th quartile of its related statistical distribution, as well as to verify the difference within P10 and P90, which indicates the control of each operation execution process. The same process was done for some rig related operations and for the whole intervention at end of it. Close contact with the intervention progress was kept and actions taken in any major deviation from the plan. This paper describes the case study where the process control and optimization of the total time for drilling 10 wells with similar design was measured between March 2009 and May 2011. It resulted in significant improvement in the drilling process. (author)

  2. The Environmental Impacts of Offshore Oil Drilling

    Science.gov (United States)

    Rose, Mary Annette

    2009-01-01

    This article presents the author's critique on Stephen L. Baird's article in the November 2008 issue of "The Technology Teacher", which describes a contemporary debate about opening more U.S. land and coastal regions to oil and gas exploration and production (E&P). While Baird's thesis epitomizes the goal of a technologically literate citizen, his…

  3. Oil and gas well site reclamation criteria in Alberta

    Energy Technology Data Exchange (ETDEWEB)

    Shergill, R. [Alpine Environmental Ltd., Calgary, AB (Canada)

    1995-12-31

    Drilling waste disposal sites are one of the most difficult sites to reclaim in the oil and gas industry, due to contamination of the site with heavy oils and salts. The fundamental principle of well site reclamation is the return of a disturbed site to a land capability equivalent to the pre-disturbance land capability, which is sustainable under normal management of the land. A list of legislative requirements for reclamation in Alberta was provided. Steps involved in bioremediation were discussed. The concept of landfarming as a drilling waste disposal option for heavy invert mud systems over a selected plot of land, was introduced. Although theoretically landfarming can take place in either the topsoil or subsoil, studies have shown that topsoil provides a more favourable environment for microbial biodegradation of the hydrocarbons contained in invert drilling muds. 7 refs., 1 fig.

  4. Research on Three-dimensional Modeling and Visualization for Well Trajectory of Drilling

    Directory of Open Access Journals (Sweden)

    Gao Xiaorong

    2013-09-01

    Full Text Available This study aims to realize 3D visualization of well trajectory more efficiently by use of a new method. In view of the shortcomings of traditional three-dimensional (3D modeling methods for well trajectory, a new method of slice-based 3D modeling for the tubular well trajectory was put forward, by which a 3D well trajectory model was established. The method can realize the 3D tubular well trajectory seamless connection efficiently and conveniently without interpolation smoothing treatment of the well trajectory’s crook. In order to provide a convenience to observe and analyze intuitively as well as control the well trajectory effectively in drilling for the drilling staff, realized 3D visualization of the well trajectory based on virtual reality technology and provided flexible human-computer interaction functions with which the drilling staff can make interactive operation such as zooming, translating and rotating, etc., for the 3D well trajectory. Consequently, the well trajectory can be observed from multi-azimuth and multi-angle, improving the oil reservoir encountering rate. Finally, an application example of 3D visualization for well trajectory in Dagang Oilfield was given.

  5. Well successfully drilled with high performance water-based fluid: Santos Basins, offshore Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Fornasier, Frank C.; Luzardo, Juan P. [Halliburton Company, Houston, TX (United States); Bishnoi, M.L. [Oil and Natural Gas Corporation Ltda. (ONGC), Dehradun (India)

    2012-07-01

    Santos Basin is a 352,260 square kilometers (136,010 sq mi) offshore pre-salt basin. It is located in the South Atlantic Ocean, some 300 kilometers (190 mi) South East of Sao Paulo, Brazil. One of the largest Brazilian sedimentary basins, it is the site of several recent significant oil fields, including Tupi and Jupiter. The criteria for drilling fluid selection is based upon the following factors: maximum cost efficiency, environmental friendliness, optimum borehole stability, and ease of use. The recommended drilling fluid formulation takes into consideration the experience gained during the drilling of wells in the Santos Basin area. The operator wanted to use a high-performance water-based fluid (HPWBF) that could provide shale inhibition, wellbore stability, lubricity and improved rate of penetration (ROP) as an alternative to synthetic-based drilling fluids to present value in terms of economics and environmental friendliness. The HPWBF consists of three synergistic products: a hydration suppressant, a dispersion suppressant, and an accretion suppressant. The system is formulated based on customized solutions for managing the clay reactivity. High logistics costs require drilling fluids that can be prepared with sea water and discharged to the sea without environmental impact. The HPWBF is a clay-free system designed for maximum shale inhibition in highly reactive formations. The system can provide wellbore stability, high rates of penetration, and acceptable rheological properties over a wide range of temperatures, with the added benefit of allowing cuttings discharge based upon water base environmental restrictions. Since no oil is used in the formulation, the HPWBF eliminates the need for cuttings processing and monitoring equipment, and exceeds the environmental requirements by achieving an LC50 value of 345,478.22 ppm in comparison with the minimum requirement (LC50 > 30,000 ppm in 96 hr), permitting use and discharge to the sea. The HPWBF selected

  6. Oil and Gas Wells in Southern Louisiana that Penetrated the Lower Miocene 1 Sequence

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The drilling history documents oil and gas wells in the Lower Miocene 1 sequence as a whole and in 10-year intervals. The wells included in this interval are...

  7. Oil and Gas Wells in Southern Louisiana that Penetrated the Upper Miocene Sequence

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The drilling history documents oil and gas wells in the Upper Miocene sequence as a whole and in 10-year intervals. The wells included in this interval are...

  8. Oil and Gas Wells in Southern Louisiana that Penetrated the Lower Miocene 2 Sequence

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The drilling history documents oil and gas wells in the Lower Miocene 2 sequence as a whole and in 10-year intervals. The wells included in this interval are...

  9. Oil and Gas Wells in Southern Louisiana that Penetrated the Middle Miocene Sequence

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The drilling history documents oil and gas wells in the Middle Miocene sequence as a whole and in 10-year intervals. The wells included in this interval are...

  10. Riserless drilling (managed pressure drilling)

    OpenAIRE

    Khan, Ahsan

    2012-01-01

    There are several problems which an oil and gas industry is facing. These problems can be solved by riserless drilling method which comes under managed pressure drilling umbrella. The most important problem is increasing number of casing strings to complete a well and to control a well in limited pressure profile. A well model was developed and both conventional and riserless drilling approaches were applied to see how many casings will be needed to complete a same well with these approach...

  11. Some vegetable oil with your rock chips? Alternative to diesel-based drilling fluids means cheaper cuttings disposal

    Energy Technology Data Exchange (ETDEWEB)

    Roche, P.

    2009-07-15

    Oil-based drilling fluids have generally provided more advantages over water-based muds but at a higher cost, including the cost of disposing massive amounts of oil-stained cuttings. There are also health and safety considerations associated with diesel-based drilling fluids. Water-based drilling muds can be mixed with other materials and buried on the lease site. Louisiana-based Rapid Energy Services has developed a drilling fluid that uses water and vegetable oil instead of hydrocarbons. The fluid is reusable and the cuttings do not require special disposal sites. The product known as Quantum EF is also targeting potassium silicate drilling fluids. Rapid Energy Services licensed the Canadian rights to the technology to Calgary-based Mud Master Drilling Fluid Services Ltd. The new drilling fluid was first tested in a field trial in northwestern Alberta by Calgary-based Amarone Oil and Gas Ltd. The product provided good shale inhibition while drilling as well as good hole cleaning. The greatest advantage is the Quantum product does not require chloride for inhibition and can be disposed of through land spreading or mixing and burying. Quantum EF is a water-external phase, notably 85 per cent water and 15 per cent oil from seeds such as canola. A water-external phase does not produce oil-wet cuttings. The drilling fluid has low levels of potassium and the additives are considered to be bio-nutrients. In the event of a spill, the soil will be fully naturally remediated within 28 days. Precautions must be taken during winter drilling to ensure the fluid does not freeze. 1 ref.

  12. 75 FR 69652 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-11-15

    ... and Offshore Drilling AGENCY: Department of Energy, Office of Fossil Energy. ACTION: Notice of open... Horizon Oil Spill and Offshore Drilling (the Commission). The Commission was organized pursuant to the... to guard against, and mitigate the impact of, any oil spills associated with offshore drilling in...

  13. 75 FR 56526 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-09-16

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department of... meeting of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the... with offshore drilling in the future. The Commission is composed of seven members appointed by...

  14. 75 FR 60097 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-09-29

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department of... meeting of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the... associated with offshore drilling in the future. The Commission is composed of seven members appointed by...

  15. 75 FR 29397 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-05-26

    ... Drilling By the authority vested in me as President by the Constitution and the laws of the United States... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the ``Commission''). Sec... against, and mitigating the impact of, oil spills associated with offshore drilling, taking...

  16. 75 FR 37783 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-06-30

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department of... meeting of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the... offshore drilling in the future. The Commission is composed of seven members appointed by the President...

  17. Rheological properties of oil-based drilling fluids at high temperature and high pressure

    Institute of Scientific and Technical Information of China (English)

    赵胜英; 鄢捷年; 舒勇; 张洪霞

    2008-01-01

    The rheological properties of two kinds of oil-based drilling fluids with typically composition were studied at pressures up to 138 MPa and temperatures up to 204 ℃ using the RheoChan 7400 Rheometer.The experimental results show that the apparent viscosity,plastic viscosity and yield point decrease with the increase of temperature,and increase with the increase of pressure.The effect of pressure on the apparent viscosity,plastic viscosity and yield point is considerable at ambient temperature.However,this effect gradually reduces with the increase of temperature.The major factor influencing the rheological properties of oil-based drilling fluids is temperature instead of pressure in the deep sections of oil wells.On the basis of numerous experiments,the model for predict the apparent viscosity,plastic viscosity and yield point of oil-based drilling fluids at high temperature and pressure was established using the method of regressive analysis.It is confirmed that the calculated data are in good agreement with the measured data,and the correlation coefficients are more than 0.98.The model is convenient for use and suitable for the application in drilling operations.

  18. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman R. Morrow

    2004-11-01

    Contamination of crude oils by surface-active agents from drilling fluids or other oil-field chemicals is more difficult to detect and quantify than bulk contamination with, for example, base fluids from oil-based muds. Bulk contamination can be detected by gas chromatography or other common analytical techniques, but surface-active contaminants can be influential at much lower concentrations that are more difficult to detect analytically, especially in the context of a mixture as complex as a crude oil. In this report we present a baseline study of interfacial tensions of 39 well-characterized crude oil samples with aqueous phases that vary in pH and ionic composition. This extensive study will provide the basis for assessing the effects of surface-active contaminant on interfacial tension and other surface properties of crude oil/brine/rock ensembles.

  19. Geospatial Analysis of Oil and Gas Wells in California

    Science.gov (United States)

    Riqueros, N. S.; Kang, M.; Jackson, R. B.

    2015-12-01

    California currently ranks third in oil production by U.S. state and more than 200,000 wells have been drilled in the state. Oil and gas wells provide a potential pathway for subsurface migration, leading to groundwater contamination and emissions of methane and other fluids to the atmosphere. Here we compile available public databases on oil and gas wells from the California Department of Conservation's Division of Oil, Gas, and Geothermal Resources, the U.S. Geological Survey, and other state and federal sources. We perform geospatial analysis at the county and field levels to characterize depths, producing formations, spud/completion/abandonment dates, land cover, population, and land ownership of active, idle, buried, abandoned, and plugged wells in California. The compiled database is designed to serve as a quantitative platform for developing field-based groundwater and air emission monitoring plans.

  20. Supercritical water oxidation of oil-based drill cuttings.

    Science.gov (United States)

    Chen, Zhong; Chen, Zeliang; Yin, Fengjun; Wang, Guangwei; Chen, Hongzhen; He, Chunlan; Xu, Yuanjian

    2017-03-09

    Oil-based drill cuttings (OBDC) are a typical hazardous solid waste that arises from drilling operations in oil and gas fields. The supercritical water oxidation (SCWO) of OBDC was comprehensively investigated in a batch reactor under the conditions of various oxygen coefficients (OC, 1.5-3.5), temperatures (T, 400-500°C) and reaction times (t, 0.5-10min). Preheating experiments indicated that most of the organic compounds in the initial OBDC sample were distributed within gaseous, oil, aqueous and solid phases, with no more than 9.8% of organic compounds converted into inorganic carbon. All tested variables, i.e., OC, T and t, positively affect the transformation of carbon compounds from the oil and solid phases to the aqueous phase and, ultimately, to CO2. Carbon monoxide is the primary stable intermediate. The total organic carbon (TOC) removal efficiency can reach up to 89.2% within 10min at 500°C. Analysis of the reaction pathways suggests both homogeneous and heterogeneous reactions exist in the reactor. The homogeneous reaction is a typical SCWO reaction that is governed by a free radical mechanism, and the heterogeneous reaction is dominated by mass transfer. The information obtained in this study is useful for further investigation and development of hydrothermal treatment procedures for OBDC.

  1. Outer Continental Shelf Oil and Natural Gas Wells - Alaska Region NAD 83

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — Surface Locations of Boreholes drilled for exploration or oil and gas production. Dataset is maintained by Bureau of Ocean Energy Management. Please note: older well...

  2. Phosphate based oil well cements

    Science.gov (United States)

    Natarajan, Ramkumar

    The main application of the cement in an oil well is to stabilize the steel casing in the borehole and protect it from corrosion. The cement is pumped through the borehole and is pushed upwards through the annulus between the casing and the formation. The cement will be exposed to temperature and pressure gradients of the borehole. Modified Portland cement that is being used presently has several shortcomings for borehole sealant. The setting of the Portland cement in permafrost regions is poor because the water in it will freeze even before the cement sets and because of high porosity and calcium oxide, a major ingredient it gets easily affected by the down hole gases such as carbon dioxide. The concept of phosphate bonded cements was born out of considerable work at Argonne National Laboratory (ANL) on their use in stabilization of radioactive and hazardous wastes. Novel cements were synthesized by an acid base reaction between a metal oxide and acid phosphate solution. The major objective of this research is to develop phosphate based oil well cements. We have used thermodynamics along with solution chemistry principles to select calcined magnesium oxide as candidate metal oxide for temperatures up to 200°F (93.3°C) and alumina for temperatures greater than 200°F (93.3°C). Solution chemistry helped us in selecting mono potassium phosphate as the acid component for temperatures less than 200°F (93.3°C) and phosphoric acid solution greater than 200°F (93.3°C). These phosphate cements have performance superior to common Portland well cements in providing suitable thickening time, better mechanical and physical properties.

  3. A Predictive Model of Enhanced Oil Recovery by Infill Drilling and Its Application

    Institute of Scientific and Technical Information of China (English)

    Xu Jianhong; Cheng Linsong; Ma Lili

    2007-01-01

    Infill drilling is now recognized as a viable improved recovery process. However, the reliable prediction of incremental recovery by infill drilling cannot be readily and accurately determined by present techniques. This paper proposes a hybrid predictive model of stream tube simulation and numerical simulation by using the contemporary theory of fluid flow in porous media. The model calculates the geometries of stream tubes, remaining oil distribution and water cut at different development stages in the near future, and uses a three-dimensional simulation to track fluid movement in each stream tube slice. This will help reservoir engineers to determine the feasibility of infill drilling. This predictive model is used to forecast the degree of control of well pattern, the ultimate incremental recovery of infill wells within an inverted 5-spot case in an oilfield and the economic benefit is also analyzed.

  4. Successful drilling of the first horizontal well in a mature field

    Energy Technology Data Exchange (ETDEWEB)

    Marruffo, I.; Achong, C. [Corpoven, S.A., Puerto La Cruz, Anzoategui (Venezuela)

    1996-08-01

    This paper discusses how the decision to drill the first horizontal well of a reservoir was taken, based on Production acceleration and the incremental economy of cash flow. The reservoir is located in the Guafita-Norto Field in Western Venezuela, contiguous to the La Yuca-Cano Limon Fields in Colombia. Guafita-Norte has 183 million stb of remaining oil reserves with 26 production wells on electrical submergible pumps. The STOIP of this under saturated reservoir (bubble point pressure is 36 psi) is 160 million stb with an initial GOR of 10 stf/stb, having a permeability between 1.5-12 darcies with a strong water drive, water coning and sanding problems due to fines migration. During 1995, it was decided to drill the first horizontal well in the reservoir based on a 3-D numerical simulation with radial flow (for water coning) and local grid refinement (for horizontal wells) coupled to an economic analysis. The simulation predetermines an initial production rate for a horizontal well 2.5 times greater than for a vertical one, and the incremental cash flow for the horizontal well is 4.5 MM$ larger for the vertical one in four (4) years, with a ROR of 200%. The horizontal well was drilled with oil-based mud to avoid hole collapse, and it was completed open hole with a single screen pack. The well is currently producing between 2000 and 3500 stb/d, clean, on natural flow. This study has clearly shown that the ultimate and decisive parameter to be weighed before undertaking this type of project, is the economic analysis, which must be performed as extensively as the technical analysis.

  5. Use of tracers to investigate drilling-fluid invasion and oil flushing during coring

    Energy Technology Data Exchange (ETDEWEB)

    Brown, A.; Marriott, F.T. (Texaco, Inc., Houston, TX (US))

    1988-11-01

    This work develops a method in which chemical tracers in the drilling fluid help determine mud filtrate invasion and the degree of oil flushing during coring of steamed and unsteamed heavy-oil formations. Salts of iodide and bromide were added to the drilling fluid while Well TO3 was cored through the Lombardi and Aurignac zones at San Ardo field in California. Vertical core plugs, taken from the periphery to the center of the retrieved whole core, were analyzed for tracer concentration. Tracer analyses indicated minimal filtrate invasion in the not-yet-steamflooded Lombardi zone and complete filtrate invasion in the steamflooded Aurignac zone. Tracer and oil saturation analyses showed the Lombardi zone to be uniform from top to bottom with an average oil saturation of 42.5% and an average porosity of 31.1%. Interpretation of tracer and oil saturation data permitted the construction of a layered model for the Aurignac zone. The layers ranged from an average oil saturation of 8% in the steamflooded layer to 37% in the bottom layer. The data showed that significant oil flushing (6%) occurred only in cores taken from the hot-waterflooded layer just below the steam zone. Vertical core-plug porosities and saturations, as determined by a unique calculating scheme, were compared with conventional and Elkins-corrected values. The comparison indicated that misapplication of the Elkins method in high-temperature formations may result in significant errors.

  6. Coated carbide drill performance under soluble coconut oil lubricant and nanoparticle enhanced MQL in drilling AISI P20

    Science.gov (United States)

    Jamil, N. A. M.; Azmi, A. I.; Fairuz, M. A.

    2016-02-01

    This research experimentally investigates the performance of a TiAlN coated carbide drill bit in drilling AISI P20 through two different kinds of lubricants, namely; soluble coconut oil (SCO) and nanoparticle-enhanced coconut oil (NECO) under minimum quantity lubrication system. The tool life and tool wear mechanism were studied using various cutting speeds of 50, 100 and 150 m/min with a constant feed of 0.01 mm/rev. Since the flank wear land was not regular along the cutting edge, the average flank wear (VB) was measured at several points using image analysis software. The drills were inspected using a scanning electron microscope to further elucidate the wear mechanism. The result indicates that drilling with the nanoparticle- enhanced lubricant was better in resisting the wear and improving the drill life to some extent

  7. Geopressured-geothermal well report. Volume I. Drilling and completion

    Energy Technology Data Exchange (ETDEWEB)

    1982-01-01

    Gladys McCall site activities are covered through the completion of the test well and salt water disposal well. The test well was drilled to a total depth of 16,510 feet, then plugged back to 15,831 feet. Three 4'' diameter diamond cores were taken for analysis. An existing well on site, the Getty-Butts Gladys McCall No. 1, was reentered and completed to a depth of 3514 feet as a salt water disposal well. The geologic interpretation of the Gladys McCall site indicated target sands for testing at 15,080 feet through 15, 831 feet. Reservoir fluid temperature at this depth is estimated to be approximately 313/sup 0/F and pressure is estimated to be +-12,800 psi. The preliminary reservoir volume estimate is 3.6 billion barrels of brine. The design wells program includes environmental monitoring of the Gladys McCall site by Louisiana State University. Field stations are set up to monitor surface and ground water quality, subsidence, land loss and shoreline erosion, and seismicity. As of December 31, 1981 the study shows no significant impact on the environment by site operations.

  8. Geologic and geophysical data for wells drilled at Raft River Valley, Cassia County, Idaho, in 1977-1978 and data for wells drilled previously

    Science.gov (United States)

    Nathenson, Manuel; Urban, Thomas C.; Covington, Harry R.

    2014-01-01

    In order to better define the size of the thermal anomaly in the Raft River Valley, Idaho, the U.S. Geological Survey drilled a series of intermediate-depth (nominal 500-ft depth) wells in 1977 and 1978.  This report presents geologic, geophysical, and temperature data for these drill holes, along with data for five wells drilled by the Idaho National Engineering Laboratory with U.S. Department of Energy Funding.  Data previously reported for other drill holes are also included in order to make them available as digital files.

  9. 75 FR 39518 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction

    Science.gov (United States)

    2010-07-09

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction AGENCY: Office..., 2010, of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, (75...

  10. Jet Drilling and Optimizing Parameter Drilling Technology in Shengli Oil Fields

    Institute of Scientific and Technical Information of China (English)

    Chen Yue; Peng Junsheng

    1996-01-01

    @@ In Shengli oilfield, remarkable achievements have been obtained in research and tests on the technologies of jet drilling and optimizing parameter drilling, extensive applications of the technologies have greatly improved drilling speed and sharply decreased drilling time and costs, thus achieving excellent social and economic benefits.

  11. 76 FR 21395 - BOEMRE Information Collection Activity; 1010-0141, Subpart D, Oil and Gas Drilling Operations...

    Science.gov (United States)

    2011-04-15

    ...; 1010-0141, Subpart D, Oil and Gas Drilling Operations, Extension of a Collection; Comment Request... request (ICR) concerns the paperwork requirements related to oil and gas drilling operations, and related.... SUPPLEMENTARY INFORMATION: Title: 30 CFR Part 250, Subpart D, Oil and Gas Drilling Operations. BOEMRE...

  12. Gas Well Bottom Hole Locations, LP and LNG, Utah Oil and Gas Well Bottom Hole Points for horizontallly drilled wells only. From the Utah Department of Natural Resources, Oil Gas and Mining Division., Published in 2000, 1:100000 (1in=8333ft) scale, State of Utah Automated Geographic Reference Center.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Gas Well Bottom Hole Locations, LP and LNG dataset, published at 1:100000 (1in=8333ft) scale, was produced all or in part from Other information as of 2000. It...

  13. Multilateral wells drilling technology implementation in the Castilla Field - Colombia, to improve Guadalupe reservoirs drainage: Castilla 32, 33, and 34 ML wells cases study

    Energy Technology Data Exchange (ETDEWEB)

    Florez, Alberto; Mercado, Orlando; Rodriguez, Sandra; Rojas, Ricardo; Naranjo, Carlos A. [ECOPETROL, Bogota (Colombia); Velez, Jorge [Halliburton Latin-America, Santa Fe de Bogota (Colombia)

    2008-07-01

    National Colombian Petroleum Company - ECOPETROL, is in the process of evaluating different technologies to increase production and improve recovery factors in their mature oil and gas fields. As part of that process, a multidisciplinary team evaluated the feasibility of multilateral well technology implementation in some of their mature fields that are currently in the late-development phase. Castilla field, located in the eastern planes of Colombia, was selected as the first option for multilateral technology implementation based in reservoir features, type of oil, and field antecedents. This paper presents the process used to conceptualize the optimum multilateral well design for Castilla field, integrating all of the geological and engineering disciplines. Geology: geological model visualization, target zones definition, pay zones lateral continuity, petrophysical properties, and fluids distribution were evaluated to select the areas to drill with advanced architecture well design. Reservoir: basic reservoir performance simulation was performed to evaluate productivity with horizontal and multilateral wells, and the difference in final reserves recovery compared with current conventional directional wells. Water production and coning problems were identified as key factors to define the multilateral well implementation in this field. Drilling: trajectory design, multilateral junction depth definition and TAML level selection, casing point's definition, drilling time and AFE estimation were the technical aspects evaluated during the planning phase to determine if the technology would be feasible. A comparison with conventional pad design was conducted to validate economic value. Multilateral TAML level 4 system selection flow process is presented applying oil industry best practices. Completion: The optimum lateral completion and production assembly design were main concerns during the planning process. Slotted liners, screens, and open-hole completion

  14. Crump Geyser Exploration and Drilling Project. High Precision Geophysics and Detailed Structural Exploration and Slim Well Drilling

    Energy Technology Data Exchange (ETDEWEB)

    Fairbank, Brian D. [Nevada Geothermal Power Company, Vancouver (Canada); Smith, Nicole [Nevada Geothermal Power Company, Vancouver (Canada)

    2015-06-10

    The Crump Geyser Exploration and Drilling Project – High Precision Geophysics and Detailed Structural Exploration and Slim Well Drilling ran from January 29, 2010 to September 30, 2013. During Phase 1 of the project, collection of all geophysical surveys was completed as outlined in the Statement of Project Objectives. In addition, a 5000-foot full sized exploration well was drilled by Ormat, and preexisting drilling data was discovered for multiple temperature gradient wells within the project area. Three dimensional modeling and interpretation of results from the geophysical surveys and drilling data gave confidence to move to the project into Phase 2 drilling. Geological and geophysical survey interpretations combined with existing downhole temperature data provided an ideal target for the first slim-hole drilled as the first task in Phase 2. Slim-hole 35-34 was drilled in September 2011 and tested temperature, lithology, and permeability along the primary range-bounding fault zone near its intersection with buried northwest-trending faults that have been identified using geophysical methods. Following analysis of the results of the first slim-hole 35-34, the second slim hole was not drilled and subsequent project tasks, including flowing differential self-potential (FDSP) surveys that were designed to detail the affect of production and injection on water flow in the shallow aquifer, were not completed. NGP sold the Crump project to Ormat in August 2014, afterwards, there was insufficient time and interest from Ormat available to complete the project objectives. NGP was unable to continue managing the award for a project they did not own due to liability issues and Novation of the award was not a viable option due to federal award timelines. NGP submitted a request to mutually terminate the award on February 18, 2015. The results of all of the technical surveys and drilling are included in this report. Fault interpretations from surface geology, aeromag

  15. Oil Well Top Hole Locations, Oil wells, Published in unknown, Norton County Appraisal Office.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, was produced all or in part from Other information as of unknown. It is described as 'Oil wells'. Data by this publisher...

  16. Foam used to drill, gravel-pack deep gas well

    Energy Technology Data Exchange (ETDEWEB)

    Dupont, J.

    1984-05-07

    Surface-generated or preformed stable foam recently has been used as the circulating medium to drill-in and gravel-pack open hole completions along the Gulf Coast. With minor modifications to conventional tools and procedures, preformed stable foam is a viable alternative to current practices in completing underpressured reservoirs. Postproduction results indicate this is a cost-effective and reliable completion method.

  17. Asphaltene precipitates in oil production wells

    DEFF Research Database (Denmark)

    Kleinitz, W,; Andersen, Simon Ivar

    1998-01-01

    At the beginning of production in a southern German oil field, flow blockage was observed during file initial stage of production from the oil wells. The hindrance was caused by the precipitation of asphaltenes in the proximity of the borehole and in the tubings. The precipitates were of solid...

  18. Experience of drilling wells using pump-compressor unit to inject aerated fluid

    Energy Technology Data Exchange (ETDEWEB)

    Oleynik, S.P.; Beley, I.V.; Lopatin, Yu.S.; Pytel, S.P.; Vasilak, I.I.; Yushkevich, V.I.

    1979-01-01

    Results are described from drilling wells with flushing by highly aerated clay fluid with the help of a UNGA unit which includes pumps and compressors of the drilling unit UBSh-1 which permits injection of an aerated mixture under pressures considerably exceeding the pressure of its formation. Qualitative and technical-economic advantages of drilling with flushing by aerated solutions with the use of a unit for injecting gas-liquid agents are presented.

  19. China-made Oil Rigs Well Sold on International Market

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    @@ By the end of July, ChinaPetroleum Technology Development Company (CPTDC), one of CNPC's subsidiaries, has cumulatively sold 26 oil drilling rigs worth more than US$200 million in the past three years.

  20. Improved Tubulars for Better Economics in Deep Gas Well Drilling using Microwave Technology

    Energy Technology Data Exchange (ETDEWEB)

    Dinesh Agrawal; Paul Gigl; Mark Hunt; Mahlon Dennis

    2007-07-31

    The main objective of the entire research program has been to improve the rate-of-penetration in deep hostile environments by improving the life cycle and performance of coiled-tubing, an important component of a deep well drilling system for oil and gas exploration, by utilizing the latest developments in the microwave materials technology. Based on the results of the Phase I and insurmountable difficulties faced in the extrusion and de-waxing processes, the approach of achieving the goals of the program was slightly changed in the Phase II in which an approach of microwave sintering combined with Cold Isostatic Press (CIP) and joining (by induction or microwave) has been adopted. This process can be developed into a semicontinuous sintering process if the CIP can produce parts fast enough to match the microwave sintering rates. The main objective of the Phase II research program is to demonstrate the potential to economically manufacture microwave processed coiled tubing with improved performance for extended useful life under hostile coiled tubing drilling conditions. After the completion of the Phase II, it is concluded that scale up and sintering of a thin wall common O.D. size tubing that is widely used in the market is still to be proved and further experimentation and refinement of the sintering process is needed in Phase III. Actual manufacturing capability of microwave sintered, industrial quality, full length tubing will most likely require several million dollars of investment.

  1. Improved Tubulars for Better Economics in Deep Gas Well Drilling Using Microwave Technology

    Energy Technology Data Exchange (ETDEWEB)

    Dinesh Agrawal

    2006-09-30

    The main objective of the entire research program has been to improve the rate-of-penetration in deep hostile environments by improving the life cycle and performance of coiled-tubing, an important component of a deep well drilling system for oil and gas exploration, by utilizing the latest developments in the microwave materials technology. Based on the results of the Phase I and insurmountable difficulties faced in the extrusion and de-waxing processes, the approach of achieving the goals of the program was slightly changed in the Phase II in which an approach of microwave sintering combined with Cold Isostatic Press (CIP) and joining (by induction or microwave) has been adopted. This process can be developed into a semicontinuous sintering process if the CIP can produce parts fast enough to match the microwave sintering rates. The main objective of the Phase II research program is to demonstrate the potential to economically manufacture microwave processed coiled tubing with improved performance for extended useful life under hostile coiled tubing drilling conditions. After the completion of the Phase II, it is concluded that scale up and sintering of a thin wall common O.D. size tubing that is widely used in the market is still to be proved and further experimentation and refinement of the sintering process is needed in Phase III. Actual manufacturing capability of microwave sintered, industrial quality, full length tubing will most likely require several million dollars of investment.

  2. Technical and economic evaluation of selected compact drill rigs for drilling 10,000 foot geothermal production wells

    Energy Technology Data Exchange (ETDEWEB)

    Huttrer, G.W. [Geothermal Management Company, Inc., Frisco, CO (United States)

    1997-11-01

    This report summarizes the investigation and evaluation of several {open_quotes}compact{close_quotes} drill rigs which could be used for drilling geothermal production wells. Use of these smaller rigs would save money by reducing mobilization costs, fuel consumption, crew sizes, and environmental impact. Advantages and disadvantages of currently-manufactured rigs are identified, and desirable characteristics for the {open_quotes}ideal{close_quotes} compact rig are defined. The report includes a detailed cost estimate of a specific rig, and an evaluation of the cost/benefit ratio of using this rig. Industry contacts for further information are given.

  3. Research on the development of intelligent oil drilling technology%关于智能化石油钻井技术的发展研究

    Institute of Scientific and Technical Information of China (English)

    王小玉

    2015-01-01

    Research on the development of intelligent oil drilling technology With the rapid development of petroleum industry, intelligent oil drilling technology has become a new technology,this paper mainly introduces the general situation,advantages and characteristics of intelligent oil drilling,as well as the development of intelligent oil drilling.%随着石油工业的快速发展,智能化石油钻井技术已经成为较为先进的石油开采新型技术,本文主要介绍智能化石油钻井的概况、优势和特点,以及对智能化石油钻井发展的认识.

  4. Shallow gas well drilling with coiled tubing in the San Juan Basin

    Energy Technology Data Exchange (ETDEWEB)

    Moon, R.G.; Ovitz, R.W.; Guild, G.J.; Biggs, M.D.

    1996-12-31

    Coiled tubing is being utilized to drill new wells, for re-entry drilling to deepen or laterally extend existing wells, and for underbalanced drilling to prevent formation damage. Less than a decade old, coiled tubing drilling technology is still in its inaugral development stage. Initially, utilizing coiled tubing was viewed as a {open_quotes}science project{close_quotes} to determine the validity of performing drilling operations in-lieu of the conventional rotary rig. Like any new technology, the initial attempts were not always successful, but did show promise as an economical alternative if continued efforts were made in the refinement of equipment and operational procedures. A multiwell project has been completed in the San Juan Basin of Northwestern New Mexico which provides documentation indicating that coiled tubing can be an alternative to the conventional rotary rig. A 3-well pilot project, a 6-well project was completed uniquely utilizing the combined resources of a coiled tubing service company, a producing company, and a drilling contractor. This combination of resources aided in the refinement of surface equipment, personnel, mud systems, jointed pipe handling, and mobilization. The results of the project indicate that utilization of coiled tubing for the specific wells drilled was an economical alternative to the conventional rotary rig for drilling shallow gas wells.

  5. Horizontal drilling in Ontario

    Energy Technology Data Exchange (ETDEWEB)

    Sidey, P.; Precul, L. [Sproule Associates Ltd., Calgary, AB (Canada)

    2002-07-01

    A review of oil and gas production in Ontario was presented with particular reference to drilling activity between 1987 to mid 2002 when 1450 vertical wells were drilled, of which 1100 were for petroleum production and the remainder were for gas storage, observation wells, private gas wells and stratigraphic tests. Of the 1100 vertical wells drilled for petroleum production, 40 per cent became gas wells, 16 per cent became oil wells, 4 per cent became oil and gas wells, and 40 per cent were dry. During the same time period, 133 horizontal wells were also drilled, mostly for petroleum. The most active operator was Talisman Energy, which drilled 101 of the 133 horizontal wells. The remainder were drilled by 12 other companies. Of the horizontal wells, 64 per cent became oil wells, 19 per cent became gas wells, and 17 per cent were dry. This presentation included graphs depicting which oil and gas pools saw vertical or horizontal drilling during the designated time period, and explained how the wells were classified. Both horizontal and vertical well targets were illustrated. Particular reference was made to Talisman Energy's Lake Erie Drilling program which revealed that horizontal wells have an initial production rate that is 5 times that expected from vertical wells. The Hillman Pool case study revealed that the initial rate of the average horizontal well is less than half that of the average vertical well. Horizontal drilling in the Lake Erie Morpeth Gas pool has also been a commercial success. This paper demonstrates that operators have maintained Ontario's oil and gas production at high levels. In 1997 widespread horizontal drilling began taking place in Ontario, and since then, approximately 30 per cent of the wells drilled in the province have been horizontal. 16 figs.

  6. Horizontal drilling pilot in a shallow heavy oil reservoir in the Suplac Field in Northwestern Romania

    Energy Technology Data Exchange (ETDEWEB)

    Lavelle, J.; Yaghoobi, A. [OMV Petrom S.A. (Romania)

    2011-07-01

    The Suplac field situated in north-western Romania is a shallow and heavy oil deposit lying at depths of between 40 and 200 meters. The deposit has been exploited since 1964 using different techniques but some areas of the reservoir located beneath villages and steep hills were never reached. The aim of this paper is to describe a project using horizontal alternating steam drive (HASD) to harvest oil from these areas by turning from vertical to horizontal. A pilot test was conducted over 4 months in 2010 with 3 parallel horizontal wells. The rig equipment, the well path designs and the directional difficulties are discussed herein. Results showed that horizontals could be drilled using a vertical mast rig and all the expectations were met. The success of this pilot project was highlighted herein and the company is now planning on continuing with a horizontal development program; however wellbore clean out is a remaining challenge.

  7. Development of methodology and correlations to predict solids concentration profile during oil well drilling static periods; Desenvolvimento de metodologia e correlacoes para previsao de perfil de concentracao de solidos durante a perfuracao de pocos de petroleo em periodos de estatica

    Energy Technology Data Exchange (ETDEWEB)

    Gandelman, Roni Abensur [Centro de Pesquisas da Petrobras (CENPES). Gerencia de Interacao Rocha-Fluido (Brazil)], e-mail: roniag@petrobras.com.br; Pinto, Gustavo Henrique Vieira Pereira [E and P Norte-Nordeste. Gerencia de Intervencao e Perfuracao de Pocos - BA (Brazil)], e-mail: gustavovieira@petrobras.com.br

    2009-12-15

    One of the main function of drilling fluid is to transport solids, generated by the bit, to the surface. Therefore, gelation is an important and desirable drilling fluid characteristic as it avoids solids sedimentation during pump -off periods. However, when circulation is resumed, an extra energy is required to break the gelled structure. Consequently, bottom-hole pressure peaks are observed and this may represent an operational risk if the fracture pressure is reached. The risk is especially high in narrow operational window scenarios, typical of deep and ultra-deep water environments. On the other hand, gelled fluids may not avoid some heavier and/or larger particles settling. It is therefore important to understand how particles settle in gelled fluids (and while the gelled structure is forming) to predict the solid concentration profiles during and after pump -off periods. This prediction is very important as it can help operators to avoid operational problems. This study developed a methodology to predict particles sedimentation in gelled fluids and pressure peaks when circulation is resumed. To develop the correlations and predict pressure peaks, several experiments were carried out with rheometers and field viscosimeters in transient and stationary conditions. The results were used to build a model that is currently being used with very promising results. (author)

  8. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman r. Morrow

    2002-06-01

    This first semiannual report covers efforts to select the materials that will be used in this project. Discussions of crude oils, rocks, smooth mineral surfaces, and drilling mud additives are included in this report.

  9. Case study : drilling horizontal exploration shale gas wells efficiently by collaboration of subsurface and drilling teams utilizing geosciences technology

    Energy Technology Data Exchange (ETDEWEB)

    Islam, N. [Talisman Energy Inc., Calgary, AB (Canada)

    2010-07-01

    Geosciences modelling and seismic interpretation methods were used to determine shear failure and pore pressure predictions from offset wells and seismic interval velocities. The aim of the study was to predict a safe range of mud weights for minimizing the horizontal stresses associated with drilling shale gas exploratory wells. The customized tool computed pore pressure, shear failure, fracture gradient and overburden gradients which were then calibrated with drilling data obtained from leak offset tests, formation integrity tests, and various other drilling parameters. Gamma rays were imported into the tool's dataset and a shale base line was selected based on the lithology and volume of shale. The shale base line was then transformed into a compaction trend line. Bower's sonic, Miller's sonic, and semi-log resistivity equations were used to predict normal compaction trend lines (NCTLs). The shear failure gradient was calculated and rock strength parameters were determined by characterizing the friction angle and cohesive strength of the formations. Case studies of wells drilled by Talisman were presented to validate the methods. 11 refs., 3 tabs., 15 figs.

  10. Water base drilling fluids for high-angle wells; Fluidos a base de agua para perfuracao de pocos com elevada inclinacao

    Energy Technology Data Exchange (ETDEWEB)

    Passarelli, Rui [PETROBRAS, Rio de Janeiro (Brazil). Dept. de Perfuracao. Div. de Fluidos de Perfuracao; Lomba, Rosana Fatima T. [PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

    1989-12-31

    Horizontal drilling has experimented a large increase in last years. In Brazil, two horizontal wells were drilled in Fazenda Belem and Carmopolis Fields. The first one reached a final measured depth of 1128 m and the horizontal length was 533 m. The drilling fluid program was elaborated after a large number of laboratory tests, in order to get a composition that best fitted the drilling requirements, mainly the desirable lubricity. The idea of using a water-base fluid instead of an oil-based, known as more suitable in this case, arose because the Company is interested in drilling this kind of well offshore, in deep water, where the use of oil-base muds is forbidden. Different compositions of water base muds were developed and tested in laboratory and the results led to low-solids salt fluids having a lubricant in its composition. The lubricity coefficients of these fluids are similar to those obtained with oil-base muds. 9-FZB-446D-CE well was drilled with the chosen fluid and high values of torque and drag were not registered, being the operation a total success. (author) 10 tabs.

  11. Study of methane solubility in oil base used in oil base drilling fluid; Estudo da solubilidade de metano em base oleo utilizada em fluido de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Carolina Teixeira da; Mariolani, Jose Ricardo Lenzi [Universidade Estadual de Campinas, SP (Brazil); Ribeiro, Paulo Roberto; Lomba, Rosana Fatima Teixeira; Bonet, Euclides Jose

    2004-07-01

    During drilling a well, it is necessary to prevent and control high pressurized zones because while drilling on those zones, could occur a kick if the formation pressure were higher then downhole pressure, allowing the entering of undesirables fluids from the formation to the wellbore. If the well is not controlled this kick could became a blowout, generating damages to the environment, to the equipment and the human life. When drilling using oil-based mud, the concern related to the well control would be higher due the gas solubility in the mud, which could make it hard to detect the kick, especially in deep and ultra deep waters. In this work we have studied the interaction between methane and organic liquids used in drilling fluids, and the measurement and analysis of the thermodynamic properties of those gas liquid mixtures. There have been measured parameters like the oil formation volume factor (FVF{sub o}), bubble pressure, solubility (Rs) and the density of the saturated liquid in function of methane mole fraction and temperature. The results have shown that the gas solubility, at downhole conditions and during kick circulation, is a factor very important to the safety during well drilling in deep and ultra deep waters. (author)

  12. Study of methane solubility in oil base used in oil base drilling fluid; Estudo da solubilidade de metano em base oleo utilizada em fluido de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Carolina Teixeira da; Mariolani, Jose Ricardo Lenzi [Universidade Estadual de Campinas, SP (Brazil); Ribeiro, Paulo Roberto; Lomba, Rosana Fatima Teixeira; Bonet, Euclides Jose

    2004-07-01

    During drilling a well, it is necessary to prevent and control high pressurized zones because while drilling on those zones, could occur a kick if the formation pressure were higher then downhole pressure, allowing the entering of undesirables fluids from the formation to the wellbore. If the well is not controlled this kick could became a blowout, generating damages to the environment, to the equipment and the human life. When drilling using oil-based mud, the concern related to the well control would be higher due the gas solubility in the mud, which could make it hard to detect the kick, especially in deep and ultra deep waters. In this work we have studied the interaction between methane and organic liquids used in drilling fluids, and the measurement and analysis of the thermodynamic properties of those gas liquid mixtures. There have been measured parameters like the oil formation volume factor (FVF{sub o}), bubble pressure, solubility (Rs) and the density of the saturated liquid in function of methane mole fraction and temperature. The results have shown that the gas solubility, at downhole conditions and during kick circulation, is a factor very important to the safety during well drilling in deep and ultra deep waters. (author)

  13. High-throughput metabarcoding of eukaryotic diversity for environmental monitoring of offshore oil-drilling activities.

    Science.gov (United States)

    Lanzén, Anders; Lekang, Katrine; Jonassen, Inge; Thompson, Eric M; Troedsson, Christofer

    2016-09-01

    As global exploitation of available resources increases, operations extend towards sensitive and previously protected ecosystems. It is important to monitor such areas in order to detect, understand and remediate environmental responses to stressors. The natural heterogeneity and complexity of communities means that accurate monitoring requires high resolution, both temporally and spatially, as well as more complete assessments of taxa. Increased resolution and taxonomic coverage is economically challenging using current microscopy-based monitoring practices. Alternatively, DNA sequencing-based methods have been suggested for cost-efficient monitoring, offering additional insights into ecosystem function and disturbance. Here, we applied DNA metabarcoding of eukaryotic communities in marine sediments, in areas of offshore drilling on the Norwegian continental shelf. Forty-five samples, collected from seven drilling sites in the Troll/Oseberg region, were assessed, using the small subunit ribosomal RNA gene as a taxonomic marker. In agreement with results based on classical morphology-based monitoring, we were able to identify changes in sediment communities surrounding oil platforms. In addition to overall changes in community structure, we identified several potential indicator taxa, responding to pollutants associated with drilling fluids. These included the metazoan orders Macrodasyida, Macrostomida and Ceriantharia, as well as several ciliates and other protist taxa, typically not targeted by environmental monitoring programmes. Analysis of a co-occurrence network to study the distribution of taxa across samples provided a framework for better understanding the impact of anthropogenic activities on the benthic food web, generating novel, testable hypotheses of trophic interactions structuring benthic communities.

  14. Discussion on new Technology of Oil Drilling Rig%石油钻机新技术探讨

    Institute of Scientific and Technical Information of China (English)

    宋云; 刘文兵

    2015-01-01

    分析了石油勘探开发和工程技术的新发展,特别是针对三大钻机技术(水平井钻井技术、欠平衡钻井技术、深井钻井技术),应运而生的新型石油钻井装备。还阐述了与之相关的新型石油钻井装备,如液压钻机、四象限运行的交流变频电驱钻机、模块钻机、快移快装钻机、钻机智能化、钻机顶驱装置等。%Analysis of the new development of petroleum exploration and development and engineering technology, especial⁃ly for the technology of three type rig technology (horizontal well, less balance well ,deep well drilling), model of petroleum drill⁃ing equipment emerge as the times require. Also elaborated the new oil drilling equipment and related, such as the AC frequency conversion rig, hydraulic drilling rig, four quadrant drive rig, modular drilling rig, quickly moving fast drilling rig, drill rig top drive device of intelligent, etc..

  15. Improving recovery efficiency of water-drive channel sandstone reservoir by drilling wells laterally

    Energy Technology Data Exchange (ETDEWEB)

    Zhiguo, F.; Quinglong, D.; Pingshi, Z.; Bingyu, J.; Weigang, L. [Research Institute of Exploration and Development, Daqing (China)

    1998-12-31

    Example of drilling a horizontal well in reservoir rock of only four meter thick by using existing casing pipe of low efficiency vertical wells to induce production in the top remaining reservoir is described. The experience shows that drilling horizontal wells laterally in thin bodies of sandstone reservoirs and improve their productivity is a feasible proposition. Productivity will still be low, but it can be improved by well stimulation. 3 refs., 3 figs.

  16. Validation and comparison of two sampling methods to assess dermal exposure to drilling fluids and crude oil.

    Science.gov (United States)

    Galea, Karen S; McGonagle, Carolyn; Sleeuwenhoek, Anne; Todd, David; Jiménez, Araceli Sánchez

    2014-06-01

    Dermal exposure to drilling fluids and crude oil is an exposure route of concern. However, there have been no published studies describing sampling methods or reporting dermal exposure measurements. We describe a study that aimed to evaluate a wipe sampling method to assess dermal exposure to an oil-based drilling fluid and crude oil, as well as to investigate the feasibility of using an interception cotton glove sampler for exposure on the hands/wrists. A direct comparison of the wipe and interception methods was also completed using pigs' trotters as a surrogate for human skin and a direct surface contact exposure scenario. Overall, acceptable recovery and sampling efficiencies were reported for both methods, and both methods had satisfactory storage stability at 1 and 7 days, although there appeared to be some loss over 14 days. The methods' comparison study revealed significantly higher removal of both fluids from the metal surface with the glove samples compared with the wipe samples (on average 2.5 times higher). Both evaluated sampling methods were found to be suitable for assessing dermal exposure to oil-based drilling fluids and crude oil; however, the comparison study clearly illustrates that glove samplers may overestimate the amount of fluid transferred to the skin. Further comparison of the two dermal sampling methods using additional exposure situations such as immersion or deposition, as well as a field evaluation, is warranted to confirm their appropriateness and suitability in the working environment.

  17. Development and field application of a novel emulsion system O/W for well drilling of low pressure reservoirs

    Energy Technology Data Exchange (ETDEWEB)

    Arellano, J.; Ojeda, A.; Blanco, J.; Medina, N.; Gutierrez, X.; Carrasquero, M.; Briceno, H. [PDVSA (Venezuela)

    2011-07-01

    In Venezuela, there are important reserves of hydrocarbons in low pressure reservoirs but accessing to these reserves is a major challenge. This paper presents a new oil in water emulsion (O/W) system, using fatty acids and their salts as surfactant additives for use in such reservoirs, and the results obtained in field applications. Emulsions were prepared using two oil types and multiple salt (KCl) concentrations. Tests were then conducted to determine their thermal stability and return permeability percentage. Results showed good tolerance of high concentrations of KCl, as well as good stability under high temperatures and a good rheological behavior. The field test showed that the O/W emulsion system presents technological and cost advantages over other commercial technologies. This paper presented a new oil in water emulsion system which is a good alternative to water based fluids for well drilling in low pressure reservoirs.

  18. Features of the marketing strategy of oil and gas companies in exploration drilling

    Science.gov (United States)

    Sharf, I.; Malanina, V.; Kamynina, L.

    2014-08-01

    The implementation of national and regional programs for the development of new oil and gas provinces of Eastern Siberia poses the challenge of increasing geological exploration. The current drilling service companies' market structure, as well as the strategic task of search and exploration effectiveness requires qualitatively new approaches for choosing a contractor. The proposed strategy to select a contractor based on comprehensive analysis of certain groups of industrial, financial, infrastructural criteria allows not only to optimize the costs of exploration activities, but also to minimize preventively the risks of a poor geological exploration. The authors' SWOT- analysis of the marketing strategy of "Gazprom neft" for choosing a contractor outlined the problem of imperfection of the Russian legislation in the sphere of activities of service companies in the oil and gas sector.

  19. New methodology for gas migration prediction before oil well cementing

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, G.H.V.P.; Martins, A.L.; Rocha, J.M.S. [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)], E-mail: gustavo_cep@yahoo.com.br; Martinelli, A.E. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2012-04-15

    Many challenges have been presented in oil well drilling including preventing gas migration after cementing operations. This phenomenon is potentially dangerous since the gas can migrate to the surface causing the annular pressurization or lead to a blowout with catastrophic results that may include the loss of the well. If the hydrostatic pressure in front of the gas zone becomes lower than the pressure in this zone, the gas will invade the well. This work presents a comprehensive methodology to evaluate gas migration after cementing operations taking into account the critical static gel strength concept associated with time dependent viscosity behavior. A mechanistic model based on a force balance acting on gas bubble was proposed to predict the bubble displacement through the cement slurry while it gels and evaluate if the hydraulic isolation will be affected allowing project operation changes to ensure well construction safely. (author)

  20. Drilling, completion, stimulation, and testing of BDM/CNGD Well 3997, Lee District, Calhoun County, West Virginia. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Overbey, W.K. Jr.; Carden, R.S.; Salamy, S.P.; Locke, C.D.; Johnson, H.R.

    1992-03-01

    This report discusses the detailed field operations in drilling, casing, completing, and stimulating the Hunter Bennett No. 3997 well located in Lee District, Calhoun County West Virginia. The project was designed and managed by BDM in cooperation with CNG Development Company. The well was spudded on November 9, 1990, and drilling was completed on December 14, 1990. The well was drilled on an average asmuth of 312 degrees with a total horizontal displacement of 2459 feet. The well was turned to a 90 degree inclination from the vertical over a measured course length of 1216 feet. Approximately 1381 feet of the well had an inclination higher than 86 degrees, while 2179 feet had an inclination greater than 62 degrees. The well was partitioned into five zones for stimulation purposes. Each zone is a little more than 300 feet long. The well was stimulated with nitrogen gas in zones one and two. Early production results are encouraging. The BDM/CNGD horizontal well averaged 147 mcfd of gas over the first week of production and, in week five, began to produce oil at a rate of about 2 bbl/day.

  1. Drilling, completion, stimulation, and testing of BDM/CNGD Well 3997, Lee District, Calhoun County, West Virginia

    Energy Technology Data Exchange (ETDEWEB)

    Overbey, W.K. Jr.; Carden, R.S.; Salamy, S.P.; Locke, C.D.; Johnson, H.R.

    1992-03-01

    This report discusses the detailed field operations in drilling, casing, completing, and stimulating the Hunter Bennett No. 3997 well located in Lee District, Calhoun County West Virginia. The project was designed and managed by BDM in cooperation with CNG Development Company. The well was spudded on November 9, 1990, and drilling was completed on December 14, 1990. The well was drilled on an average asmuth of 312 degrees with a total horizontal displacement of 2459 feet. The well was turned to a 90 degree inclination from the vertical over a measured course length of 1216 feet. Approximately 1381 feet of the well had an inclination higher than 86 degrees, while 2179 feet had an inclination greater than 62 degrees. The well was partitioned into five zones for stimulation purposes. Each zone is a little more than 300 feet long. The well was stimulated with nitrogen gas in zones one and two. Early production results are encouraging. The BDM/CNGD horizontal well averaged 147 mcfd of gas over the first week of production and, in week five, began to produce oil at a rate of about 2 bbl/day.

  2. SAGD pilot project, wells MFB-772 (producer) / MFB-773 (injector), U1,3 MFB-53 reservoir, Bare Field. Orinoco oil belt. Venezuela

    Energy Technology Data Exchange (ETDEWEB)

    Mago, R.; Franco, L.; Armas, F.; Vasquez, R.; Rodriguez, J.; Gil, E. [PDVSA EandP (Venezuela)

    2011-07-01

    In heavy oil and extra heavy oil fields, steam assisted gravity drainage is a thermal recovery method used to reduce oil viscosity and thus increase oil recovery. For SAGD to be successfully applied in deep reservoirs, drilling and completion of the producer and injector wells are critical. Petroleos de Venezuela SA (PDVSA) is currently assessing the feasibility of SAGD in the Orinoco oil belt in Venezuela and this paper aims at presenting the methodology used to ensure optimal drilling and completion of the project. This method was divided in several stages: planning, drilling and completion of the producer, injector and then of the observer wells and cold information capture. It was found that the use of magnetic guidance tools, injection pipe pre-insulated and pressure and temperature sensors helps optimize the drilling and completion process. A methodology was presented to standardize operational procedures in the drilling and completion of SAGD projects in the Orinoco oil belt.

  3. Health Impact Assessment of an oil drilling project in California

    Directory of Open Access Journals (Sweden)

    Lindsay C. McCallum

    2016-04-01

    Full Text Available Objectives: The Health Impact Assessment (HIA was conducted to evaluate the potential community health implications of a proposed oil drilling and production project in Hermosa Beach, California. The HIA considered 17 determinants of health that fell under 6 major categories (i.e., air quality, water and soil quality, upset conditions, noise and light emissions, traffic, and community livability. Material and Methods: This paper attempts to address some of the gaps within the HIA practice by presenting the methodological approach and results of this transparent, comprehensive HIA; specifically, the evaluation matrix and decision-making framework that have been developed for this HIA and form the basis of the evaluation and allow for a clear conclusion to be reached in respect of any given health determinant (i.e., positive, negative, neutral. Results: There is a number of aspects of the project that may positively influence health (e.g., increased education funding, ability to enhance green space, and at the same time there have been potential negative effects identified (e.g., odor, blowouts, property values. Except for upset conditions, the negative health outcomes have been largely nuisance-related (e.g., odor, aesthetics without irreversible health impacts. The majority of the health determinants, that had been examined, have revealed that the project would have no substantial effect on the health of the community. Conclusions: Using the newly developed methodology and based on established mitigation measures and additional recommendations provided in the HIA, the authors have concluded that the project will have no substantial effect on community health. This approach and methodology will assist practitioners, stakeholders and decision-makers in advancing the HIA as a useful, reproducible, and informative tool.

  4. The Questions of the Dynamics of Drilling Bit on the Surface of Well Bottom

    Science.gov (United States)

    Burievich, Toshov Javohir

    2016-06-01

    The purpose of this study was to investigate the dynamics of drilling bit on the well bottom as a function of their geometrical parameters. The frame of this method for this study includes former existed objective data on the unstable drilling devices as cantilever suspension. Research methods and calculation results are as follows: square coverage by tools blade working in different rotation regime; radius of the inscribed and circumscribed circle which leads to introduce and prospectively and solve problems on process optimization of mining rock at drilling the well bottom.

  5. Evaluation of low toxicity mineral oil base drilling fluids; Avaliacao de fluidos de perfuracao a base de oleo mineral de baixa toxidez

    Energy Technology Data Exchange (ETDEWEB)

    Ponte, Ielton Frederico da [PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

    1989-12-31

    In order to introduce low toxicity mineral oil base drilling fluids in Brazil, we carried out a series with a low aromatic content basic oil for lubricants, produced by PETROBRAS: the Lubrax Industrial OB-9 (Lubind OB-9). This oil, as well as its mixture with aviation kerosene to reduce viscosity, was found adequate for use in drilling fluids together with other national products developed by companies that supply additives for drilling fluids in Brazil. We present the results of laboratory tests with systems of four different manufacturers, one of which was chosen for initial field tests. These tests, which were carried out at the Miranga and Bu River Fields, in the Drilling District of Bahia, produced satisfactory results. We anticipate the use of these fluids in other areas where the company operates. (author) 2 refs., 3 tabs.

  6. Scientific Drilling of Impact Craters - Well Logging and Core Analyses Using Magnetic Methods (Invited)

    Science.gov (United States)

    Fucugauchi, J. U.; Perez-Cruz, L. L.; Velasco-Villarreal, M.

    2013-12-01

    Drilling projects of impact structures provide data on the structure and stratigraphy of target, impact and post-impact lithologies, providing insight on the impact dynamics and cratering. Studies have successfully included magnetic well logging and analyses in core and cuttings, directed to characterize the subsurface stratigraphy and structure at depth. There are 170-180 impact craters documented in the terrestrial record, which is a small proportion compared to expectations derived from what is observed on the Moon, Mars and other bodies of the solar system. Knowledge of the internal 3-D deep structure of craters, critical for understanding impacts and crater formation, can best be studied by geophysics and drilling. On Earth, few craters have yet been investigated by drilling. Craters have been drilled as part of industry surveys and/or academic projects, including notably Chicxulub, Sudbury, Ries, Vredefort, Manson and many other craters. As part of the Continental ICDP program, drilling projects have been conducted on the Chicxulub, Bosumtwi, Chesapeake, Ries and El gygytgyn craters. Inclusion of continuous core recovery expanded the range of paleomagnetic and rock magnetic applications, with direct core laboratory measurements, which are part of the tools available in the ocean and continental drilling programs. Drilling studies are here briefly reviewed, with emphasis on the Chicxulub crater formed by an asteroid impact 66 Ma ago at the Cretaceous/Paleogene boundary. Chicxulub crater has no surface expression, covered by a kilometer of Cenozoic sediments, thus making drilling an essential tool. As part of our studies we have drilled eleven wells with continuous core recovery. Magnetic susceptibility logging, magnetostratigraphic, rock magnetic and fabric studies have been carried out and results used for lateral correlation, dating, formation evaluation, azimuthal core orientation and physical property contrasts. Contributions of magnetic studies on impact

  7. Simultaneous sand control and liner cement system: keeping well productivity by optimizing drilling and completion operations in mature fields

    Energy Technology Data Exchange (ETDEWEB)

    Sa, Andrea Nicolino de; Silva, Dayana Nunes e; Calderon, Agostinho [Petroleo Brasileiro S.A. (PETROBRAS), Rio de janeiro, RJ (Brazil)

    2012-07-01

    The need to reduce oil extraction costs by increasing the recovery factor in mature fields unconsolidated sandstone reservoirs motivated the development of drilling and completion techniques that integrate the various interfaces of engineering the well, resulting in a final well configuration that provides maximum oil production at a lower cost. Due to the continued growth of drilling and completion of new wells or deviation of old wells in the design of mesh density field with an advanced degree of exploitation, PETROBRAS took the challenge to seek options for projects well, in order to maintain productivity and reduce their construction time, with the optimization of drilling and sand control systems. To achieve these goals, PETROBRAS developed the SCARS - Simultaneous Sand Control and Liner Cementing System, a pioneer technique in the global oil industry, which consists of a one trip sequence of operations in which sand control screens and liner are installed followed by the open hole gravel pack operation performed with the alpha and beta waves deposition technique, using a non aqueous system as a carrier fluid. The sequence is completed by liner cementing in the same trip. The great success of this project was based on the definition of a specific application scenario and demands allowing optimization of the system. This project started with the development of a non aqueous system as a gravel pack carrier fluid in order to perform an open hole gravel pack with the alpha/beta wave deposition technique along with the development and optimization of SCARS procedures. This article details the planning and execution phases of this project and also presents a broad description of the technical aspects. (author)

  8. Concentration and Distribution of Well Drilling in the Amargosa Desert Area of Southern Nevada

    Science.gov (United States)

    Lee, M. P.; Gross, A. J.; Coleman, N. M.

    2002-05-01

    The earliest sources of fresh water supply in the Amargosa Desert area of Southern Nevada were the abundant, naturally occurring (cold) springs. They initially sustained the indigenous Native American populations and later, Euro-American miners, farmers, and ranchers. Prior to 1900, the many local springs and a few (mostly shallow) hand-dug wells were the principal sources of water supply. The first hand-dug well in the area was the Franklin well; it was dug in 1852 for workers performing a survey of the California-Nevada State line. The first mechanically bored wells were drilled for local railroads, along their respective alignments, sometime between 1905-07. About 1917, the first irrigation well in the Amargosa Desert area was drilled for an experimental farm operated by the Tonopah and Tidewater Railroad. In the late 1940s-early 1950s, permanent interest in the area was established, in large measure because of a Federally sponsored desert reclamation program. For the period 1900-1999, a preliminary evaluation of publicly available information (collected principally by the State Engineer) indicates that more than 950 boreholes were drilled in the Amargosa Desert area. Almost half of these boreholes were drilled in the last 20 years. Forty-two percent of the boreholes were drilled to supply fresh drinking water; 26 percent were in support of irrigated agriculture; 21 percent of the wells were drilled for some non-water supply related purpose - ground-water monitoring and testing; and 11 percent were drilled to supply water for commercial or unspecified applications. Most of the well drilling has been concentrated in a parcel of land about 30-40 kilometers south of the proposed geologic repository at Yucca Mountain, Nevada. Most wells have been generally drilled to depths less than 30 meters (100 feet), although deeper wells are uncommon. The main reason is that drilling is expensive and the profitability of finding and extracting potable water, in sufficient

  9. HYDRODYNAMIC ANALYSIS OF SUCK-IN PULSED JET IN WELL DRILLING

    Institute of Scientific and Technical Information of China (English)

    WANG Rui-he; DU Yu-kun; NI Hong-jian; MA Lin

    2011-01-01

    The development of new drilling methods is important for the exploration and production of oil fields. The pulsed jet is a drilling technology of high potentiality. This article proposes a new concept of suck-in pulsed jet with self-excited oscillation, by which a full use of the hydraulic power can be made in the annular space. A hydrodynamic analysis of suck-in pulsed jet with self-excited oscillation is carried out by numerical simulations and rock-breaking experiments. It is shown that with the jet, a negative pressure zone will be formed in the oscillation cavity to ensure automatic sucking of enough annular fluids and the formation of an efficient pulsed jet. The rock-breaking and pressure testing results have verified the reliability of the numerical simulation. The research provides a basis for the development of the pulsed jet drilling technology.

  10. Phase 2 drilling operations at the Long Valley Exploratory Well (LVF 51--20)

    Energy Technology Data Exchange (ETDEWEB)

    Finger, J.T.; Jacobson, R.D.

    1992-06-01

    This report describes the second drilling phase, completed to a depth of 7588 feet in November 1991, of the Long Valley Exploratory Well near Mammoth Lakes, California. The well in Long Valley Caldera is planned to reach an ultimate depth of 20,000 feet or a bottomhole temperature of 500{degrees}C (whichever comes first). There will be four drilling phases, at least a year apart with scientific experiments in the wellbore between active drilling periods. Phase 1 drilling in 1989 was completed with 20 in. casing from surface to a depth of 2558 ft., and a 3.8 in. core hole was drilled below the shoe to a depth of 2754 in. Phase 2 included a 17-{1/2} in. hole out of the 20 in. shoe, with 13-3/8 in. casing to 6825 ft., and continuous wireline coring below that to 7588 ft. This document comprises a narrative log of the daily activities, the daily drilling reports, mud logger's reports, summary of drilling fluids used, and other miscellaneous records.

  11. Cuttings-carried theory and erosion rule in gas drilling horizontal well

    Directory of Open Access Journals (Sweden)

    Wei Na

    2014-01-01

    Full Text Available In gas horizontal drilling, the gas with cuttings will go through the annulus at high speed which will lead strong erosion to the drill tools. This paper proposes a cuttings-carried theory and modified the critical cuttings-carried model for the gas-solid flow. Meanwhile, the erosive energy is obtained through simulating the gas-solid mixture in different conditions. The study result has positive significance on the determination of reasonable injection volume by optimizing construction parameters of horizontal well in gas drilling.

  12. Sensitivity studies of the common bean (Vigna unguiculata) and maize (Zea mays) to different soil types from the crude oil drilling site at Kutchalli, Nigeria

    Energy Technology Data Exchange (ETDEWEB)

    Anoliefo, G.O. [Dept. of Botany, Univ. of Benin, Benin City (Nigeria); Isikhuemhen, O.S. [Dept. of Natural Resources and Environmental Design, NC Agricultural and Technical State Univ., Greensboro, NC (United States); Ohimain, E.I. [Rohi Biotechnologies Ltd., Port Harcourt (Nigeria)

    2006-02-15

    Background, aims and scope. The economic growth that Nigeria has enjoyed as a result of oil revenue has its drawback through exposure of people in the oil producing areas to environmental contamination, due largely to the increase in the movement of oil. Activities associated with oil well drilling on agricultural lands have led to serious economic losses on the communities affected. The local people in most of these communities are peasants who do not know how to react to drilling wastes or polluted fields where they have their crops. A case under study is the Kutchalli oil drilling area. Methods. Waste pit soil from drilling waste dumps in Kutchalli oil drilling area was tested whole and in combinations with 'clean' soil for their abilities to support plant growth and development in common bean (Vigna unguiculata) and maize (Zea mays). Seed germination, plant height, leaf area, biomass accumulation, respiratory activity as well as soil chemical analysis were used to access the ability of waste pit soil to support plant growth and development in the test plants. Results, discussion and conclusions. Waste pit soil completely inhibited the germination of bean and maize seeds. Waste pit soil in combinations with different proportions of Kutchalli soil gave growth (germination, height of plants, number of leaves, leaf area, etc.) values that were inferior to the control soil (Kutchalli) and the independent control soil (Monguno). Seeds planted in the test soil combinations containing waste pit soil showed significantly low respiratory activity. Waste pit soil seems to be toxic to plant growth and development. Drilling mud in combination with native Kutchalli soil significantly enhanced plant growth and development. Recommendations and outlook. The seed germination, growth and development inhibition by waste pit soil suggests its toxicity. We want to suggest the need for strict control and monitoring of waste pit soil in oil drilling sites. (orig.)

  13. A Comparative Study of Diesel Oil and Soybean Oil as Oil-Based Drilling Mud

    OpenAIRE

    Okorie E. Agwu; Okon, Anietie N.; Udoh, Francis D.

    2015-01-01

    Oil-based mud (OBM) was formulated with soybean oil extracted from soybean using the Soxhlet extraction method. The formulated soybean mud properties were compared with diesel oil mud properties. The compared properties were rheological properties, yield point and gel strength, and mud density and filtration loss properties, fluid loss and filter cake. The results obtained show that the soybean oil mud exhibited Bingham plastic rheological model with applicable (low) yield point and gel stren...

  14. MARGINAL EXPENSE OIL WELL WIRELESS SURVEILLANCE MEOWS

    Energy Technology Data Exchange (ETDEWEB)

    Mason M. Medizade; John R. Ridgely; Donald G. Nelson

    2004-11-01

    A marginal expense oil well wireless surveillance system to monitor system performance and production from rod-pumped wells in real time from wells operated by Vaquero Energy in the Edison Field, Main Area of Kern County in California has been successfully designed and field tested. The surveillance system includes a proprietary flow sensor, a programmable transmitting unit, a base receiver and receiving antenna, and a base station computer equipped with software to interpret the data. First, the system design is presented. Second, field data obtained from three wells is shown. Results of the study show that an effective, cost competitive, real-time wireless surveillance system can be introduced to oil fields across the United States and the world.

  15. Device for monitoring the position of a drilling ship in relation to the underwater well head

    Energy Technology Data Exchange (ETDEWEB)

    Kurbanov, A.O.; Bagirov, M.D.

    1981-05-07

    A device is suggested for monitoring the position of a drilling ship in relation to the underwater well head containing a winch, two sensitive elements arranged in two mutually perpendicular planes through which a cable is passed, two sensors attached to the sensitive elements. In order to improve the accuracy of monitoring the position of the drilling ship, the sensitive elements are made in the form of two semirings installed with the possibility of rotation.

  16. Histograms showing variations in oil yield, water yield, and specific gravity of oil from Fischer assay analyses of oil-shale drill cores and cuttings from the Piceance Basin, northwestern Colorado

    Science.gov (United States)

    Dietrich, John D.; Brownfield, Michael E.; Johnson, Ronald C.; Mercier, Tracey J.

    2014-01-01

    Recent studies indicate that the Piceance Basin in northwestern Colorado contains over 1.5 trillion barrels of oil in place, making the basin the largest known oil-shale deposit in the world. Previously published histograms display oil-yield variations with depth and widely correlate rich and lean oil-shale beds and zones throughout the basin. Histograms in this report display oil-yield data plotted alongside either water-yield or oil specific-gravity data. Fischer assay analyses of core and cutting samples collected from exploration drill holes penetrating the Eocene Green River Formation in the Piceance Basin can aid in determining the origins of those deposits, as well as estimating the amount of organic matter, halite, nahcolite, and water-bearing minerals. This report focuses only on the oil yield plotted against water yield and oil specific gravity.

  17. Unconventional Gas and Oil Drilling Is Associated with Increased Hospital Utilization Rates.

    Directory of Open Access Journals (Sweden)

    Thomas Jemielita

    Full Text Available Over the past ten years, unconventional gas and oil drilling (UGOD has markedly expanded in the United States. Despite substantial increases in well drilling, the health consequences of UGOD toxicant exposure remain unclear. This study examines an association between wells and healthcare use by zip code from 2007 to 2011 in Pennsylvania. Inpatient discharge databases from the Pennsylvania Healthcare Cost Containment Council were correlated with active wells by zip code in three counties in Pennsylvania. For overall inpatient prevalence rates and 25 specific medical categories, the association of inpatient prevalence rates with number of wells per zip code and, separately, with wells per km2 (separated into quantiles and defined as well density were estimated using fixed-effects Poisson models. To account for multiple comparisons, a Bonferroni correction with associations of p<0.00096 was considered statistically significant. Cardiology inpatient prevalence rates were significantly associated with number of wells per zip code (p<0.00096 and wells per km2 (p<0.00096 while neurology inpatient prevalence rates were significantly associated with wells per km2 (p<0.00096. Furthermore, evidence also supported an association between well density and inpatient prevalence rates for the medical categories of dermatology, neurology, oncology, and urology. These data suggest that UGOD wells, which dramatically increased in the past decade, were associated with increased inpatient prevalence rates within specific medical categories in Pennsylvania. Further studies are necessary to address healthcare costs of UGOD and determine whether specific toxicants or combinations are associated with organ-specific responses.

  18. Fracture Detection in Geothermal Wells Drilled in Volcanic Rocks

    Energy Technology Data Exchange (ETDEWEB)

    Gonfalini, Mauro; Chelini, Walter; Cheruvier, Etienne; Suau, Jean; Klopf, Werner

    1987-01-20

    The Phlegrean Fields, close to Naples, are the site of important geothermal activity. The formations are volcanic and mostly tuffites. They are originally very tight but the geothermal alteration locally produces fractures with large increase in permeability. The lack of geological markers makes well-to-well correlation quite difficult. Thus the local detection of fractured zones in each well is very important for the evaluation of its potential. The Mofete 8 D well is a typical example. A rather complete logging program was run for fracture detection. Standard methods turned out to be disappointing. However several non-standard detectors were found to be very consistent and, later on, in excellent agreement with the analysis of cuttings. They are derived from the Dual Laterolog, the SP, the Temperature log and, most particularly, the Acoustic Waveforms from the Long Spacing Sonic. The Dual Laterolog and the Temperature Log indicate invasion by fresh and cold mud filtrate; the SP behaves as in a typical Sand-Shale sequence. Sonic Waveforms were first analyzed by a purely empirical method derived from consistent log patterns. A practical algorithm compares the total energy measured in each of the two fixed time windows located the one before, the other after the fluid arrivals. The altered zones (i.e. fractured and permeable) are clearly shown by a complete reversal of the relative energy of these two windows. A more scientific method was then applied to the Waveforms; it is based on both logging experiments and physical considerations. The energy carried by the tube wave is separated by a frequency discrimination: it correlates very well with formation alteration, thus also with the other indicators including the empirical Waveform method. It should have two advantages: – It should permit at least a semi quantitative permeability evaluation – It seems to be promising in other formations: non-volcanic geothermal wells and even hydrocarbon-bearing rocks. 10 refs

  19. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman R. Morrow

    2006-01-01

    The objectives of this project are: (1) to improve understanding of the wettability alteration of mixed-wet rocks that results from contact with the components of synthetic oil-based drilling and completion fluids formulated to meet the needs of arctic drilling; (2) to investigate cleaning methods to reverse the wettability alteration of mixed-wet cores caused by contact with these SBM components; and (3) to develop new approaches to restoration of wetting that will permit the use of cores drilled with SBM formulations for valid studies of reservoir properties.

  20. China's First 6000 m Electric-Driven Desert Oil Drilling Rig

    Institute of Scientific and Technical Information of China (English)

    CP News

    1996-01-01

    @@ The newly-developed Model ZJ 60DS electric-driven desert oil drilling rig with a drilling capacity of 6000 m is the first of its kind in China. It is a success of the common efforts given by seven scientific research institutes and manufacturer with the Lanzhou Petroleum Chemical Engineering Machinery General Factory as the main contractor. The drilling rig passes the technical appraisement jointly organized by the Ministry of Machinery Industry of the People's Republic of China and China National Petroleum Corporation in Lanzhou on March 30, 1996.

  1. Horizontal oil well applications and oil recovery assessment. Volume 2: Applications overview, Final report

    Energy Technology Data Exchange (ETDEWEB)

    Deskins, W.G.; McDonald, W.J.; Knoll, R.G.; Springer, S.J.

    1995-03-01

    Horizontal technology has been applied in over 110 formations in the USA. Volume 1 of this study addresses the overall success of horizontal technology, especially in less-publicized formations, i.e., other than the Austin Chalk, Bakken, and Niobrara. Operators in the USA and Canada were surveyed on a formation-by-formation basis by means of a questionnaire. Response data were received describing horizontal well projects in 58 formations in the USA and 88 in Canada. Operators` responses were analyzed for trends in technical and economic success based on lithology (clastics and carbonates) and resource type (light oil, heavy oil, and gas). The potential impact of horizontal technology on reserves was also estimated. A forecast of horizontal drilling activity over the next decade was developed.

  2. Reservoir Characterization during Underbalanced Drilling of Horizontal Wells Based on Real-Time Data Monitoring

    Directory of Open Access Journals (Sweden)

    Gao Li

    2014-01-01

    Full Text Available In this work, a methodology for characterizing reservoir pore pressure and permeability during underbalanced drilling of horizontal wells was presented. The methodology utilizes a transient multiphase wellbore flow model that is extended with a transient well influx analytical model during underbalanced drilling of horizontal wells. The effects of the density behavior of drilling fluid and wellbore heat transfer are considered in our wellbore flow model. Based on Kneissl’s methodology, an improved method with a different testing procedure was used to estimate the reservoir pore pressure by introducing fluctuations in the bottom hole pressure. To acquire timely basic data for reservoir characterization, a dedicated fully automated control real-time data monitoring system was established. The methodology is applied to a realistic case, and the results indicate that the estimated reservoir pore pressure and permeability fit well to the truth values from well test after drilling. The results also show that the real-time data monitoring system is operational and can provide accurate and complete data set in real time for reservoir characterization. The methodology can handle reservoir characterization during underbalanced drilling of horizontal wells.

  3. Fischer Assays of Oil-Shale Drill Cores and Rotary Cuttings from the Greater Green River Basin, Southwestern Wyoming

    Science.gov (United States)

    ,

    2008-01-01

    Chapter 1 of this CD-ROM is a database of digitized Fischer (shale-oil) assays of cores and cuttings from boreholes drilled in the Eocene Green River oil shale deposits in southwestern Wyoming. Assays of samples from some surface sections are also included. Most of the Fischer assay analyses were made by the former U.S. Bureau of Mines (USBM) at its laboratory in Laramie, Wyoming. Other assays, made by institutional or private laboratories, were donated to the U.S. Geological Survey (USGS) and are included in this database as well as Adobe PDF-scanned images of some of the original laboratory assay reports and lithologic logs prepared by USBM geologists. The size of this database is 75.2 megabytes and includes information on 971 core holes and rotary-drilled boreholes and numerous surface sections. Most of these data were released previously by the USBM and the USGS through the National Technical Information Service but are no longer available from that agency. Fischer assays for boreholes in northeastern Utah and northwestern Colorado have been published by the USGS. Additional data include geophysical logs, groundwater data, chemical and X-ray diffraction analyses, and other data. These materials are available for inspection in the office of the USGS Central Energy Resources Team in Lakewood, Colorado. The digitized assays were checked with the original laboratory reports, but some errors likely remain. Other information, such as locations and elevations of core holes and oil and gas tests, were not thoroughly checked. However, owing to the current interest in oil-shale development, it was considered in the public interest to make this preliminary database available at this time. Chapter 2 of this CD-ROM presents oil-yield histograms of samples of cores and cuttings from exploration drill holes in the Eocene Green River Formation in the Great Divide, Green River, and Washakie Basins of southwestern Wyoming. A database was compiled that includes about 47

  4. Drilling, completion, stimulation, and testing of Hardy HW{number_sign}1 well, Putnam County, West Virginia. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Overbey, W.K. Jr.; Carden, R.S.; Locke, C.D.; Salamy, S.P.

    1992-03-01

    This report discusses the detailed field operations in drilling, logging, casing, completing, stimulating and testing the Hardy HW No. l well located in Union District, Putnam County, West Virginia. The project was designed and managed by BDM in cooperation with Cabot Oil and Gas Corporation. The well was spudded on November 29, 1989 and was completed at a total measured depth of 6406 feet on December 29, 1989. The well was drilled on an average azimuth of 335 degrees with a total horizontal displacement of 2618 feet. Approximately 1035 feet of the well had an inclination higher than 86 degrees, while 2212 feet of the well had an inclination greater than 62 degrees. The well was partitioned into five zones for stimulation purposes. Four zones were stimulated during three stimulation operations (Zones 3 and 4 were stimulated together). Zone 1 stimulation was a successful foam frac while the stimulations on Zones 2, 3-4 were Partially successful. Initial gas production rates were 4.5 times greater than the natural production rate. After 21 months, gas produced from the BDM/Cabot well has declined at a rate about one-half that of a conventional vertical well in the area. This horizontal well is projected to produce 475 million cubic feet of gas over a 30-year period.

  5. Drilling, completion, stimulation, and testing of Hardy HW[number sign]1 well, Putnam County, West Virginia

    Energy Technology Data Exchange (ETDEWEB)

    Overbey, W.K. Jr.; Carden, R.S.; Locke, C.D.; Salamy, S.P.

    1992-03-01

    This report discusses the detailed field operations in drilling, logging, casing, completing, stimulating and testing the Hardy HW No. l well located in Union District, Putnam County, West Virginia. The project was designed and managed by BDM in cooperation with Cabot Oil and Gas Corporation. The well was spudded on November 29, 1989 and was completed at a total measured depth of 6406 feet on December 29, 1989. The well was drilled on an average azimuth of 335 degrees with a total horizontal displacement of 2618 feet. Approximately 1035 feet of the well had an inclination higher than 86 degrees, while 2212 feet of the well had an inclination greater than 62 degrees. The well was partitioned into five zones for stimulation purposes. Four zones were stimulated during three stimulation operations (Zones 3 and 4 were stimulated together). Zone 1 stimulation was a successful foam frac while the stimulations on Zones 2, 3-4 were Partially successful. Initial gas production rates were 4.5 times greater than the natural production rate. After 21 months, gas produced from the BDM/Cabot well has declined at a rate about one-half that of a conventional vertical well in the area. This horizontal well is projected to produce 475 million cubic feet of gas over a 30-year period.

  6. Zhongyuan Offers Drilling Service for Microbes

    Institute of Scientific and Technical Information of China (English)

    Zhang Zhiyu

    2001-01-01

    @@ No. 1 Drilling Company of Zhongyuan Petroleum Exploration Bureau and US-based Microbes Inc.signed a drilling engineering contract for six wells in Jilin Oil Field worth more than 11 million yuan in mid-October 2001.

  7. Gas Well Top Hole Locations, LP and LNG, DNROilGasHD-Path-Utah Oil and Gas Well Horizontal drill paths. From the Utah Department of Natural Resources, Oil Gas and Mining Division. http://ogm.utah.gov, Published in 2007, 1:100000 (1in=8333ft) scale, State of Utah Automated Geographic Reference Center.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Gas Well Top Hole Locations, LP and LNG dataset, published at 1:100000 (1in=8333ft) scale, was produced all or in part from Other information as of 2007. It is...

  8. Phase III Drilling Operations at the Long Valley Exploratory Well (LVF 51-20)

    Energy Technology Data Exchange (ETDEWEB)

    Finger, J.T.; Jacobson, R.D.

    1999-06-01

    During July-September, 1998, a jointly funded drilling operation deepened the Long Valley Exploratory Well from 7178 feet to 9832 feet. This was the third major drilling phase of a project that began in 1989, but had sporadic progress because of discontinuities in tiding. Support for Phase III came from the California Energy Commission (CEC), the International Continental Drilling Program (ICDP), the US Geological Survey (USGS), and DOE. Each of these agencies had a somewhat different agenda: the CEC wants to evaluate the energy potential (specifically energy extraction from magma) of Long Valley Caldera; the ICDP is studying the evolution and other characteristics of young, silicic calderas; the USGS will use this hole as an observatory in their Volcano Hazards program; and the DOE, through Sandia, has an opportunity to test new geothermal tools and techniques in a realistic field environment. This report gives a description of the equipment used in drilling and testing; a narrative of the drilling operations; compiled daily drilling reports; cost information on the project; and a brief summary of engineering results related to equipment performance and energy potential. Detailed description of the scientific results will appear in publications by the USGS and other researchers.

  9. Drilling rig noise assessment model vs. field monitoring results Imperial Oil Resources Cold Lake in-situ bitumen development area

    Energy Technology Data Exchange (ETDEWEB)

    Nixon, J.; MacDonald, T. [Imperial Oil Resources, Calgary, AB (Canada). Cold Lake Projects; Wright, R. [HFP Acoustical Consultants Corp., Calgary, AB (Canada)

    2007-07-01

    Oil and gas companies in Alberta must comply with the noise-emissions standards in the Noise Control Directive 038 of the Alberta Energy and Utilities Board (EUB). Licensees are responsible for risk when choosing sites and designing facilities. As such, they are required to work proactively to minimize potential impacts of new developments and must report existing noise levels. Imperial Oil Resources (IOR) Cold Lake operation is Canada's largest in-situ bitumen development facility which undergoes significant, ongoing development including the addition of up to 10 new multi-well production sites per year. In this study, the following equipment was assessed as a component of the noise impact assessment: the draw works, rotary table and drilling floor operations of a typical pad-drilling rig; the equipment skid for a typical diesel-electric rig, which includes two diesel engines, mud pumps and mud tanks; and, the equipment skid for a typical all electric rig, which includes only the mud pumps and mud tanks. Drilling rig noise measurements taken in 2006 at at two operating drill rigs were compared with 1996 drilling rig noise measurements. Sound level measurements at the U08 and U09 operating drill rigs were completed at distances of 5 m, 10 m, 20 m and 40 m and the measurements were used to calculate sound power levels for the drilling floor. A comparison of predicted sound levels to measured sound levels was then presented. Higher sound power level values in the 2006 measurements were due to equipment noise being centered at the drilling complex as opposed to the rig floor in 1996. The 2006 field monitoring data were then used by HFP Acoustical Consultants to update the predictive model which was provided to IOR in January 2006. The updated sound levels around the electric drilling rigs range from approximately 60 dBA near the edge of the lease up to 83 dBA near the noisiest equipment. It was concluded that the predictions from the model remain conservative and

  10. Series 190 Diesel Engines Used in China's Oil Drilling

    Institute of Scientific and Technical Information of China (English)

    Liu Qimin

    1996-01-01

    @@ Jinan Diesel Engine Works, located in Jinan,Shandong Province, was established more than 70 years ago. Now it produces series 190 diesel engines and diesel generating sets. Over 95 percent of land drilling power engines used in China are from Jinan Diesel Engine Works.

  11. Effect of drilling fluid systems and temperature on oil mist and vapour levels generated from shale shaker.

    Science.gov (United States)

    Steinsvåg, Kjersti; Galea, Karen S; Krüger, Kirsti; Peikli, Vegard; Sánchez-Jiménez, Araceli; Sætvedt, Esther; Searl, Alison; Cherrie, John W; van Tongeren, Martie

    2011-05-01

    Workers in the drilling section of the offshore petroleum industry are exposed to air pollutants generated by drilling fluids. Oil mist and oil vapour concentrations have been measured in the drilling fluid processing areas for decades; however, little work has been carried out to investigate exposure determinants such as drilling fluid viscosity and temperature. A study was undertaken to investigate the effect of two different oil-based drilling fluid systems and their temperature on oil mist, oil vapour, and total volatile organic compounds (TVOC) levels in a simulated shale shaker room at a purpose-built test centre. Oil mist and oil vapour concentrations were sampled simultaneously using a sampling arrangement consisting of a Millipore closed cassette loaded with glass fibre and cellulose acetate filters attached to a backup charcoal tube. TVOCs were measured by a PhoCheck photo-ionization detector direct reading instrument. Concentrations of oil mist, oil vapour, and TVOC in the atmosphere surrounding the shale shaker were assessed during three separate test periods. Two oil-based drilling fluids, denoted 'System 2.0' and 'System 3.5', containing base oils with a viscosity of 2.0 and 3.3-3.7 mm(2) s(-1) at 40°C, respectively, were used at temperatures ranging from 40 to 75°C. In general, the System 2.0 yielded low oil mist levels, but high oil vapour concentrations, while the opposite was found for the System 3.5. Statistical significant differences between the drilling fluid systems were found for oil mist (P = 0.025),vapour (P < 0.001), and TVOC (P = 0.011). Increasing temperature increased the oil mist, oil vapour, and TVOC levels. Oil vapour levels at the test facility exceeded the Norwegian oil vapour occupational exposure limit (OEL) of 30 mg m(-3) when the drilling fluid temperature was ≥50°C. The practice of testing compliance of oil vapour exposure from drilling fluids systems containing base oils with viscosity of ≤2.0 mm(2) s(-1) at 40

  12. Phase 2 Reese River Geothermal Project Slim Well 56-4 Drilling and Testing

    Energy Technology Data Exchange (ETDEWEB)

    Henkle, William R.; Ronne, Joel

    2008-06-15

    This report covers the drilling and testing of the slim well 56-4 at the Reese River Geothermal Project in Lander County, Nevada. This well was partially funded through a GRED III Cooperative Funding Agreement # DE-FC36-04GO14344, from USDOE.

  13. Structural dynamics modification for derrick of deep well drilling rig based on experimental modal test and frequency sensitivity analysis

    Directory of Open Access Journals (Sweden)

    Hua Jian

    2015-09-01

    Full Text Available A statically designed derrick of deep oil well drilling rig may have poor dynamic characteristics, which can cause earlier structure failure of the drilling rig and harsh working condition. One such designed derrick is found to vibrate severely in operation while the rotation speed of rotary table is about 120 r/min with the working frequency of 2.0 Hz. To solve this problem, an experimental modal test of the derrick is conducted and the modal frequencies and vibration shapes are obtained. Through comparison of modal frequencies with that of exciting devices, it is found that the severe vibration of the drilling rig is caused by the resonance of second modal frequency (1.96 Hz and the working frequency of rotary table. Based on principles of sensitivity analysis and structural dynamics modification method, the frequency sensitivities of all nodes on the derrick are calculated and compared, and then seven nodes with high-frequency sensitivity are selected on which corresponding mass are added to vary the modal frequency. Result shows that the second modal frequency of the derrick is reduced to 1.42 Hz and is out of the normal working frequency range of rotary table, which demonstrates that the dynamic characteristics of the derrick is improved and severe vibration can be avoided.

  14. Performance evaluation of NEEM oil and HONGE Oil as cutting fluid in drilling operation of mild steel

    Science.gov (United States)

    Jyothi, P. N.; Susmitha, M.; Sharan, P.

    2017-04-01

    Cutting fluids are used in machining industries for improving tool life, reducing work piece and thermal deformation, improving surface finish and flushing away chips from the cutting zone. Although the application of cutting fluids increases the tool life and Machining efficiency, but it has many major problems related to environmental impacts and health hazards along with recycling & disposal. These problems gave provision for the introduction of mineral, vegetable and animal oils. These oils play an important role in improving various machining properties, including corrosion protection, lubricity, antibacterial protection, even emulsibility and chemical stability. Compared to mineral oils, vegetable oils in general possess high viscosity index, high flash point, high lubricity and low evaporative losses. Vegetable oils can be edible or non-edible oils and Various researchers have proved that edible vegetable oils viz., palm oil, coconut oil, canola oil, soya bean oil can be effectively used as eco-friendly cutting fluid in machining operations. But in present situations harnessing edible oils for lubricants formation restricts the use due to increased demands of growing population worldwide and availability. In the present work, Non-edible vegetable oil like Neem and Honge are been used as cutting fluid for drilling of Mild steel and its effect on cutting temperature, hardness and surface roughness are been investigated. Results obtained are compared with SAE 20W40 (petroleum based cutting fluid)and dry cutting condition.

  15. Effect of rheology on flow displacement during cementing process in oil wells

    Energy Technology Data Exchange (ETDEWEB)

    Braghini, Andre; Naccache, Monica F.; Fonseca, Marcos I. [Dept. Mechanical Engineering. Pontificia Universidade Catolica (PUR-Rio), Rio de Janeiro, RJ (Brazil)], e-mails: mnaccache@puc-rio.br; Miranda, Cristiane R. de; Martins, Andre L.; Aranha, Pedro E. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)], e-mails: crisrichard@petrobras.com.br, aleibsohn@petrobras.com.br, pearanha@petrobras.com.br

    2010-07-01

    This paper describes a set of numerical simulations of the displacement flow of three non-Newtonian fluids through annular eccentric wells. The main application of this work is the studying of drilling and completion processes of oil wells where a cement slurry pushes the drilling mud, used in the drilling process to lubricate the drill and to remove the produced drilling cuts. To avoid contamination, a spacer fluid is usually inserted between them. Both drilling mud and cement slurry behave as non-Newtonian fluids, and the spacer fluid can be Newtonian or non-Newtonian. The analysis of flow and interface configuration between these fluids helps to determine contamination, and is an important tool for the process optimization. The numerical solution of the governing conservation equations of mass and momentum is obtained with the Fluent software, using the finite volume technique and the volume of fluid method. The effects of rheological parameters, density ratios and pumped volume of the spacer fluid are investigated. The results obtained show that the displacement is better when a more viscous spacer fluid is used. The results also show that using lower amounts of the spacer fluid can lead to contamination, which is worse in the smaller gap region of the annular space, in the case of non-rectilinear well. It was also observed that the density ratios play a major role in the cementing operation. (author)

  16. Detonator assembly for oil well perforating gun

    Energy Technology Data Exchange (ETDEWEB)

    Regalbuto, J.A.

    1981-02-18

    A safe/arm detonator assembly for use with an oil well perforating gun assembly has 2 housing members isolated from well-bore fluid which are rotatable from a safe position wherein a detonator and a booster are held out of alignment, to an armed position wherein the detonator and booster are moved into alignment. The detonator assembly is further arranged to be installed in a well perforating gun assembly such that the gun assembly may be transported with the detonator assembly in the safe position, and rotated to the armed position at the well site without disassembling the gun assembly. A safety pin may protrude from one of the housing members across a cavity between the members to cover and protect the booster from accidental detonation when the detonator assembly is in the safe position. The detonator and booster cavities may be held aligned by a detent ball. 16 claims.

  17. Phase 1 drilling operations at the Magma Energy Exploratory Well (LVF 51-20)

    Energy Technology Data Exchange (ETDEWEB)

    Finger, J.T.; Jacobson, R.D.

    1990-12-01

    This report describes the Phase 1 drilling operations for the Magma Energy Exploratory Well near Mammoth Lakes, California. An important part of the Department of Energy's Magma Energy Program, this well is designed to reach an ultimate depth of 20,000 feet or a bottomhole temperature of 500{degree}C, whichever comes first. There will be four drilling phases, at least a year apart, with scientific investigations in the borehole between the drilling intervals. Phase 1 of this project resulted in a 20 inch cased hole to 2558 feet, with 185 feet of coring beyond that. This document comprises a narrative of the daily activities, copies of the daily mud and lithologic reports, time breakdowns of rig activities, inventories of lost circulation materials, temperature logs of the cored hole, and a strip chart mud log. 2 figs.

  18. Performance evaluation of vegetable-based oils in drilling austenitic stainless steel

    DEFF Research Database (Denmark)

    Belluco, Walter; De Chiffre, Leonardo

    2004-01-01

    The efficiency of six cutting oils was evaluated in drilling AISI 316L austenitic stainless steel using conventional HSS-Co tools by measurements of tool life, tool wear, cutting forces and chip formation. Seven tools were tested with each fluid to catastrophic failure. Cutting forces and chip...... in a measurement capability comparable to that obtained using tool life as a performance criterion. As a consequence, it is suggested that drilling thrust can be used to assess the performance of cutting fluids in drilling stainless steel, resulting in considerable time savings and cost reduction with respect...... breaking were recorded for each bore, and tool wear was measured at constant intervals. A commercial mineral-based oil was taken as reference product, and five vegetable-based cutting fluids at different levels of additivation were tested. All measured parameters were in agreement, confirming...

  19. Responses of macrobenthos colonizing estuarine sediments contaminated with drilling mud containing diesel oil

    Energy Technology Data Exchange (ETDEWEB)

    Tagatz, M.E.; Plaia, G.R.; Deans, C.H.

    1985-07-01

    Acute toxicities and sublethal effects were determined in several investigations for 11 types of drilling muds obtained from offshore drilling sites in the Gulf of Mexico, which the Petroleum Equipment Suppliers Association supplied to the Environmental Protection Agency. All were used muds that had been recycled during drilling. Those containing the highest amounts of No. 2 diesel fuel oil were the most acutely toxic to mysids (Mysidopsis bahia), grass shrimp (Palaemonetes pugio), quahog clams (Mercenaria mercenaria), and sand dollars (Echinarachnius parma) and elicited the greatest sublethal responses in corals (Acropora cervicornis). A lignosulfonate mud was the most toxic, followed by a lime mud containing 3.98 mg diesel/g. The present study was initiated to determine the impact of the lime mud with its diesel oil component on field colonization by macrobenthos.

  20. Quality in drilling operations

    Energy Technology Data Exchange (ETDEWEB)

    Duncan, E.; Gervais, I. [Sedco Forex Jacintoport Facility, Channelview, TX (United States); Le Moign, Y.; Pangarkar, S.; Stibbs, B. [Sedco Forex, Montrouge (France); McMorran, P. [Sedco Forex, Pau (France); Nordquist, E. [Dubai Petroleum Company, Dubai (United Arab Emirates); Pittman, T. [Sedco Forex, Perth (Australia); Schindler, H. [Sedco Forex, Dubai (United Arab Emirates); Scott, P. [Woodside Offshore Petroleum Pty. Ltd., Perth (Australia)

    1996-12-31

    Driven by cost and profitability pressures, quality has taken on new meaning and importance in the oil field during the past decade. In drilling operations, new initiatives have led to cooperative team efforts between operators and drilling contractors to enhance quality. In this article examples are given of how one drilling contractor, by adopting a quality culture, is reaping major benefits for its clients as well as its employees. 22 figs., 19 refs.

  1. Nanoplugging Performance of Hyperbranched Polyamine as Nanoplugging Agent in Oil-Based Drilling Fluid

    Directory of Open Access Journals (Sweden)

    Gang Xie

    2015-01-01

    Full Text Available A hyperbranched polyamine was synthesized by self-condensing vinyl polymerization with divinyl sulfone, N-phenyl-p-phenylenediamine, by A2 + BB2' approach. The hyperbranched polyamine was characterized by FT-IR, TGA, and phase analysis light scanning. Average grain diameter of hyperbranched polyamine was 36.7 nm. Hyperbranched polyamine has good thermal stability. Hyperbranched polyamine (HBPA was employed successfully as nanoplugging agent in oil-based drilling fluid system, which could plug nanopore formation in shale formation. HBPA has a little effect on rheological properties of oil-based drilling fluid and the FLAPI and FLHTHP decreased dramatically with an increase of hyperbranched polyamine. Emulsion-breaking voltage has a slight increase, which is beneficial to maintain stability of oil-based drilling fluid. When the HBPA concentration is greater than 1 wt%, plugging rate of oil-based drilling fluid for artificial core is close to 100% and the permeability recovery value can reach 99.7% after adding 1 wt% HBPA, which prove that HBPA has an excellent plugging performance.

  2. Waste to Want: Polymer nanocomposites using nanoclays extracted from Oil based drilling mud waste

    Science.gov (United States)

    Adegbotolu, Urenna V.; Njuguna, James; Pollard, Pat; Yates, Kyari

    2014-08-01

    Due to the European Union (EU) waste frame work directive (WFD), legislations have been endorsed in EU member states such as UK for the Recycling of wastes with a vision to prevent and reduce landfilling of waste. Spent oil based drilling mud (drilling fluid) is a waste from the Oil and Gas industry with great potentials for recycling after appropriate clean-up and treatment processes. This research is the novel application of nanoclays extracted from spent oil based drilling mud (drilling fluid) clean-up as nanofiller in the manufacture of nanocomposite materials. Research and initial experiments have been undertaken which investigate the suitability of Polyamide 6 (PA6) as potential polymer of interest. SEM and EDAX were used to ascertain morphological and elemental characteristics of the nanofiller. ICPOES has been used to ascertain the metal concentration of the untreated nanofiller to be treated (by oil and heavy metal extraction) before the production of nanocomposite materials. The challenges faced and future works are also discussed.

  3. IMPACTS OF DRILLING ADDITIVES ON DATA OBTAINED FROM HYDROGEOLOGIC CHARACTERIZATION WELLS AT LOS ALAMOS NATIONAL LABORATORY

    Science.gov (United States)

    Personnel at the EPA Ground Water and Ecosystems Restoration Division (GWERD) were requested by EPA Region 6 to evaluate the impacts of well drilling practices at the Los Alamos National Laboratory (LANL). The focus of this review involved analysis of the impacts of bentonite- a...

  4. USE OF DRILLING FLUIDS IN MONITORING WELL NETWORK INSTALLATION: LANL AND OPEN DISCUSSION

    Science.gov (United States)

    Personnel at the EPA Ground Water and Ecosystems Restoration Division (GWERD) were requested by EPA Region 6 to provide a technical analysis of the impacts of well drilling practices implemented at the Los Alamos National Laboratory (LANL) as part of the development of their grou...

  5. Performance of palm oil as a biobased machining lubricant when drilling inconel 718

    Directory of Open Access Journals (Sweden)

    Abd Rahim Erween

    2017-01-01

    Full Text Available Metalworking fluid acts as cooling and lubrication agent at the cutting zone in the machining process. However, conventional Metalworking fluid such mineral oil gives negative impact on the human and environment. Therefore, the manufacture tends to substitute the mineral oil to bio-based oil such as vegetables and synthetic oil. In this paper, the drilling experiment was carried out to evaluate the efficiency of palm oil and compare it with minimal quantity lubrication technique using synthetic ester, flood coolant and air blow with respect to cutting temperature, cutting force, torque and tool life. The experimental results showed that the application of palm oil under minimal quantity lubrication condition as the cutting fluid was more efficient process as it improves the machining performances.

  6. Development and evaluation of various drilling fluids for slim-hole wells

    Energy Technology Data Exchange (ETDEWEB)

    Enilari, M.G.; Osisanya, S.O.; Ayeni, K. [Oklahoma Univ., Norman, OK (United States)

    2006-07-01

    Drilling cost optimization is an important issue facing the petroleum industry. Substantial cost savings can be achieved using slim-hole technology due to the use of less cement, less drilling fluids, lower costs for disposing of drilled cuttings, smaller drilling rigs, and a reduction in rig power requirements. The reduced annular clearance in slim-holes has a major effect on pressure losses which can lead to fracturing the formation and lost circulation. Therefore, recent advances in slim-hole technology include the development of drilling fluids in which density, weighting material, viscosity and flow rates are carefully considered. The purpose of this study was to develop a low-cost, low viscosity fluid that will reduce the annular pressure loss (APL) significantly while maintaining a gauged hole. It includes the development and testing of viscosified brines and bentonite-based muds. This study also involved the rheological testing and characterization of 53 fluid compositions. Pressure losses in the well flow systems and transport or carrying capacities of the fluids were calculated using the data with 3 rheological models of Bingham-Plastic, Power-Law and Herschel-Bulkley and various slim-hole geometries. The effect of high temperature on frictional pressure losses was also studied. The lowest frictional pressure losses occurred with the use of partially hydrolyzed polyacrylamide (PHPA) viscosified brines, but the xanthan viscosified brines had better carrying capacity due to their high viscosities. Frictional pressure losses were lower at high temperatures due to reduction in fluid viscosity, indicating that the carrying capacity of the fluids would also be much lower. It was concluded that the newly developed water-clay-based fluids and brines with some polymers were suitable drilling fluids for slim-hole wells. 12 refs., 8 tabs., 3 figs.

  7. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman R. Morrow

    2005-04-01

    Exposure to crude oil in the presence of an initial brine saturation can render rocks mixed-wet. Subsequent exposure to components of synthetic oil-based drilling fluids can alter the wetting toward less water-wet or more oil-wet conditions. Mixing of the non-aromatic base oils used in synthetic oil-based muds (SBM) with an asphaltic crude oil can destabilize asphaltenes and make cores less water-wet. Wetting changes can also occur due to contact with the surfactants used in SBM formulations to emulsify water and make the rock cuttings oil-wet. Reservoir cores drilled with SBMs, therefore, show wetting properties much different from the reservoir wetting conditions, invalidating laboratory core analysis using SBM contaminated cores. Core cleaning is required in order to remove all the drilling mud contaminants. In theory, core wettability can then be restored to reservoir wetting conditions by exposure to brine and crude oil. The efficiency of core cleaning of SBM contaminated cores has been explored in this study. A new core cleaning procedure was developed aimed to remove the adsorbed asphaltenes and emulsifiers from the contaminated Berea sandstone cores. Sodium hydroxide was introduced into the cleaning process in order to create a strongly alkaline condition. The high pH environment in the pore spaces changed the electrical charges of both basic and acidic functional groups, reducing the attractive interactions between adsorbing materials and the rock surface. In cores, flow-through and extraction methods were investigated. The effectiveness of the cleaning procedure was assessed by spontaneous imbibition tests and Amott wettability measurements. Test results indicating that introduction of sodium hydroxide played a key role in removing adsorbed materials were confirmed by contact angle measurements on similarly treated mica surfaces. Cleaning of the contaminated cores reversed their wettability from oil-wet to strongly water-wet as demonstrated by spontaneous

  8. Examination of the relationship between project management critical success factors and project success of oil and gas drilling projects

    Science.gov (United States)

    Alagba, Tonye J.

    Oil and gas drilling projects are the primary means by which oil companies recover large volumes of commercially available hydrocarbons from deep reservoirs. These types of projects are complex in nature, involving management of multiple stakeholder interfaces, multidisciplinary personnel, complex contractor relationships, and turbulent environmental and market conditions, necessitating the application of proven project management best practices and critical success factors (CSFs) to achieve success. Although there is some practitioner oriented literature on project management CSFs for drilling projects, none of these is based on empirical evidence, from research. In addition, the literature has reported alarming rates of oil and gas drilling project failure, which is attributable not to technical factors, but to failure of project management. The aim of this quantitative correlational study therefore, was to discover an empirically verified list of project management CSFs, which consistent application leads to successful implementation of oil and gas drilling projects. The study collected survey data online, from a random sample of 127 oil and gas drilling personnel who were members of LinkedIn's online community "Drilling Supervisors, Managers, and Engineers". The results of the study indicated that 10 project management factors are individually related to project success of oil and gas drilling projects. These 10 CSFs are namely; Project mission, Top management support, Project schedule/plan, Client consultation, Personnel, Technical tasks, Client acceptance, Monitoring and feedback, Communication, and Troubleshooting. In addition, the study found that the relationships between the 10 CSFs and drilling project success is unaffected by participant and project demographics---role of project personnel, and project location. The significance of these findings are both practical, and theoretical. Practically, application of an empirically verified CSFs list to oil

  9. Synthesis and Performance Evaluation of a New Deoiling Agent for Treatment of Waste Oil-Based Drilling Fluids

    Directory of Open Access Journals (Sweden)

    Pingting Liu

    2014-01-01

    Full Text Available Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA, as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by amine, formic acid, and formaldehyde solution. With this agent, the waste oil-based drilling fluid can be treated without complex process and expensive equipment. Furthermore, the agent used in the treatment can be recycled, which reduces waste of resource and energy. The switch performance, deoiling performance, structural characterization, and mechanisms of action are studied. The experimental results show that the oil content of the recycled oil is higher than 96% and more than 93% oil in waste oil-based drilling fluid can be recycled. The oil content of the solid residues of deoiling is less than 3%.

  10. Bottom-Fill Method for Stopping Leaking Oil Wells

    CERN Document Server

    Bloomfield, Louis A

    2010-01-01

    Hardware failure at the top of a deep underwater oil well can result in a catastrophic oil leak. The enormous pressure lifting the column of oil in that well makes it nearly impossible to stop from the top with seals or pressurization. We propose to fill the bottom of the well with dense and possibly streamlined objects that can descend through the rising oil. As they accumulate, those objects couple to the oil via viscous and drag forces and increase the oil's effective density. When its effective density exceeds that of the earth's crust, the oil will have essentially stopped flowing.

  11. Wintertime Air Quality Impacts from Oil and Natural Gas Drilling Operations in the Bakken Formation Region

    Science.gov (United States)

    Evanoski-Cole, Ashley; Sive, Barkley; Zhou, Yong; Prenni, Anthony; Schurman, Misha; Day, Derek; Sullivan, Amy; Li, Yi; Hand, Jenny; Gebhart, Kristi; Schichtel, Bret; Collett, Jeffrey

    2016-04-01

    Oil and natural gas extraction has dramatically increased in the last decade in the United States due to the increased use of unconventional drilling techniques which include horizontal drilling and hydraulic fracturing. The impact of these drilling activities on local and regional air quality in oil and gas basins across the country are still relatively unknown, especially in recently developed basins such as the Bakken shale formation. This study is the first to conduct a comprehensive characterization of the regional air quality in the Bakken region. The Bakken shale formation, part of the Williston basin, is located in North Dakota and Montana in the United States and Saskatchewan and Manitoba in Canada. Oil and gas drilling operations can impact air quality in a variety of ways, including the generation of atmospheric particulate matter (PM), hazardous air pollutants, ozone, and greenhouse gas emissions. During the winter especially, PM formation can be enhanced and meteorological conditions can favor increased concentrations of PM and other pollutants. In this study, ground-based measurements throughout the Bakken region in North Dakota and Montana were collected over two consecutive winters to gain regional trends of air quality impacts from the oil and gas drilling activities. Additionally, one field site had a comprehensive suite of instrumentation operating at high time resolution to gain detailed characterization of the atmospheric composition. Measurements included organic carbon and black carbon concentrations in PM, the characterization of inorganic PM, inorganic gases, volatile organic compounds (VOCs), precipitation and meteorology. These elevated PM episodes were further investigated using the local meteorological conditions and regional transport patterns. Episodes of elevated concentrations of nitrogen oxides and sulfur dioxide were also detected. The VOC concentrations were analyzed and specific VOCs that are known oil and gas tracers were used

  12. Wellbore Stability in Oil and Gas Drilling with Chemical-Mechanical Coupling

    Directory of Open Access Journals (Sweden)

    Chuanliang Yan

    2013-01-01

    Full Text Available Wellbore instability in oil and gas drilling is resulted from both mechanical and chemical factors. Hydration is produced in shale formation owing to the influence of the chemical property of drilling fluid. A new experimental method to measure diffusion coefficient of shale hydration is given, and the calculation method of experimental results is introduced. The diffusion coefficient of shale hydration is measured with the downhole temperature and pressure condition, then the penetration migrate law of drilling fluid filtrate around the wellbore is calculated. Furthermore, the changing rules of shale mechanical properties affected by hydration and water absorption are studied through experiments. The relationships between shale mechanical parameters and the water content are established. The wellbore stability model chemical-mechanical coupling is obtained based on the experimental results. Under the action of drilling fluid, hydration makes the shale formation softened and produced the swelling strain after drilling. This will lead to the collapse pressure increases after drilling. The study results provide a reference for studying hydration collapse period of shale.

  13. Oil/gas separator for installation at burning wells

    Energy Technology Data Exchange (ETDEWEB)

    Alonso, C.T.; Bender, D.A.; Bowman, B.R. [and others

    1991-12-31

    An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait`s oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular oil catcher at the bottom of the separator, or from the concrete cellar surrounding the well.

  14. 30 CFR 250.458 - What quantities of drilling fluids are required?

    Science.gov (United States)

    2010-07-01

    ... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... necessary to ensure well control. You must determine those quantities based on known or anticipated drilling... drilling fluid material to maintain well control, you must suspend drilling operations....

  15. Economic Viability of the Use of Local Pseudo-Oils for Drilling Fluid ...

    African Journals Online (AJOL)

    Michael O. Mensah

    2015-12-02

    Dec 2, 2015 ... for High Geothermal Drilling. Applications” Journal ... This paper considers the formulations and disposal ..... International Journal of Renewable Energy. Research ... His research interests are in Well Engineering particularly ...

  16. Development and Applications of the Solid Emulsifier Used to Improve the Performance of Oil-in-water Drilling Fluids

    Institute of Scientific and Technical Information of China (English)

    YanJienian; WangFuhua

    2004-01-01

    The oil-in-water emulsion drilling fluids, prepared by adding 5-12% (by volume) of mineral oil (or diesel) to water-based muds, have been widely used for stuck-pipe prevention in the Shengli Oilfield. In some cases, the emulsion stability of this kind of mud system is not strong enough to meet the requirements of drilling operations. To overcome this drawback, a solid emulsifer, which is characterized by its very small particle size and special wetting behavior (slightly water-wet), has been developed and successfully applied to improve the emulsion stability and other performances of these drilling fluids. Prior to the development of this technology, an extensive study was conducted to deal with the influence of various kinds of finely divided insoluble solid particles on oil/water emulsification. The substances used include bentonite, organophilic clay, kaolinite, barite, two kinds of calcium carbonate with different particle sizes, two kinds of silica with different wetting behaviors, and a newly developed solid emulsifier. Both the emulsion stability experiments and the drop coalescence experiments are performed to evaluate the contribution of these particles to emulsification. The measured final emulsion volume disappears after 12 hours and the half-life for water and oil drops are used as the measures of emulsion stability. The experimental data show that the type, size, concentration and wettability of the particles, and the presence of some surfactants control the type and stability of emulsions for a given oil/water system, and the fine particles of the solids emulsifier provide the most effective stabilization for water-continuous emulsions compared with other kinds of particles. Meanwhile, it can be observed that these particles also stabilize oil-continuous emulsions effectively in some cases since their wetting behavior is close to neutral. The O/W emulsion mud stabilized by the newly developed solid emulsifier has become one of the major mud systems

  17. 30 CFR 75.1700 - Oil and gas wells.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Oil and gas wells. 75.1700 Section 75.1700... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Miscellaneous § 75.1700 Oil and gas wells. Each operator of a coal mine shall take reasonable measures to locate oil and gas wells penetrating coalbeds or...

  18. Experimental Study Optimizing Hole Cleaning-Cuttings Transport in Oil Drilling Engineering

    Institute of Scientific and Technical Information of China (English)

    Ibrahim A A; Musa T A

    2003-01-01

    With a clear understanding of the drilling fluid techniques and the cutting-taking mechanism, a new advanced model is set up for analyzing field data and quantitative forecast of cutting-taking mechanism. Therefore, a number of values affecting the drilling rate and the hole cleaning are studied over a wide range of parameters. Drilling data obtained under high-borehole-pressure conditions are analyzed to determine the causes of the reduction in rate of penetration (ROP) as the borehole pressure increases, which in some cases is caused by the buildup of rock debris under the bit. The theoretical achievement and testing conclusions can be very instructional for horizontal well drilling. Much higher annular velocities are required for effective hole cleaning in directional wells than in vertical wells. Highviscosity muds are observed to provide better transport than low-viscosity muds.

  19. 75 FR 75995 - Request for Comments on Helium-3 Use in the Oil and Natural Gas Well Logging Industry

    Science.gov (United States)

    2010-12-07

    ... manufacture neutron detectors used by the well logging industry or wireline or Logging-While-Drilling tools incorporating neutron detectors, and whether companies purchase or lease logging tools that contain neutron... for Comments on Helium-3 Use in the Oil and Natural Gas Well Logging Industry AGENCY: Office of...

  20. Oil and gas wells of Afghanistan with well logs (welllogafg.shp)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This shapefile contains points that describe the location of hydrocarbon exploration and production wells drilled in Afghanistan; and hyperlinks to scanned images of...

  1. Potential impacts of artificial intelligence expert systems on geothermal well drilling costs:

    Energy Technology Data Exchange (ETDEWEB)

    Satrape, J.V.

    1987-11-24

    The Geothermal research Program of the US Department of Energy (DOE) has as one of its goals to reduce the cost of drilling geothermal wells by 25 percent. To attain this goal, DOE continuously evaluates new technologies to determine their potential in contributing to the Program. One such technology is artifical intelligence (AI), a branch of computer science that, in recent years, has begun to impact the marketplace in a number of fields. Expert systems techniques can (and in some cases, already have) been applied to develop computer-based ''advisors'' to assist drilling personnel in areas such as designing mud systems, casing plans, and cement programs, optimizing drill bit selection and bottom hole asssembly (BHA) design, and alleviating lost circulation, stuck pipe, fishing, and cement problems. Intelligent machines with sensor and/or robotic directly linked to AI systems, have potential applications in areas of bit control, rig hydraulics, pipe handling, and pipe inspection. Using a well costing spreadsheet, the potential savings that could be attributed to each of these systems was calculated for three base cases: a dry steam well at The Geysers, a medium-depth Imerial Valley well, and a deep Imperial Valley well. Based on the average potential savings to be realized, expert systems for handling lost circulations problems and for BHA design are the most likely to produce significant results. Automated bit control and rig hydraulics also exhibit high potential savings, but these savings are extremely sensitive to the assumptions of improved drilling efficiency and the cost of these sytems at the rig. 50 refs., 19 figs., 17 tabs.

  2. Distribution features of cuttings bed and sensitivity analysis of major drilling parameters for cuttings transport in gas drilling horizontal wells

    Institute of Scientific and Technical Information of China (English)

    祝效华; 易静; 刘清友

    2015-01-01

    In the current engineering methods for the gas horizontal drilling, the distribution features of cuttings bed remain an issue to be cleared, and the gas horizontal drilling is still in early stages of development. For on-site drilling, a 3-D transient model is established in this paper to simulate the distribution features and the transport mechanism of the cuttings bed, based on the gas-solid two-phase flow theory. The effects of major drilling parameters, such as the gas velocity, the drill pipe rotation, the cutting size and the eccentricity, on the cuttings transport efficiency are analyzed. The major findings of this study include that the cuttings begin to settle down and build up a fixed cuttings bed, in the most evident regions in front and behind the connector, the dominant parameter of the wellbore cleaning is the gas velocity, and, as the cutting size is increased, the thickness of the cuttings bed developed in the wellbore increases significantly. In addition, the eccentricity has some influence on the cuttings transport, and the drill pipe rotation has little effect on the cuttings transport.

  3. Drilling and operational sounds from an oil production island in the ice-covered Beaufort sea.

    Science.gov (United States)

    Blackwell, Susanna B; Greene, Charles R; Richardson, W John

    2004-11-01

    Recordings of sounds underwater and in air, and of iceborne vibrations, were obtained at Northstar Island, an artificial gravel island in the Beaufort Sea near Prudhoe Bay (Alaska). The aim was to document the levels, characteristics, and range dependence of sounds and vibrations produced by drilling and oil production during the winter, when the island was surrounded by shore-fast ice. Drilling produced the highest underwater broadband (10-10,000 Hz) levels (maximum= 124 dB re: 1 microPa at 1 km), and mainly affected 700-1400 Hz frequencies. In contrast, drilling did not increase broadband levels in air or ice relative to levels during other island activities. Production did not increase broadband levels for any of the sensors. In all media, broadband levels decreased by approximately 20 dB/tenfold change in distance. Background levels underwater were reached by 9.4 km during drilling and 3-4 km without. In the air and ice, background levels were reached 5-10 km and 2-10 km from Northstar, respectively, depending on the wind but irrespective of drilling. A comparison of the recorded sounds with harbor and ringed seal audiograms showed that Northstar sounds were probably audible to seals, at least intermittently, out to approximately 1.5 km in water and approximately 5 km in air.

  4. Sample application to test site No. 1, Kenedy Co. [Offset well information, drilling fluids program, cost estimates, and data acquisition

    Energy Technology Data Exchange (ETDEWEB)

    Podio, A.L.; Gray, K.E.; Isokrari, O.F.; Knapp, R.M.; Silberberg, I.H.; Thompson, T.W.

    1976-01-01

    In order to satisfy the objective of outlining the preliminary plan and schedules as well as obtaining representative costs for drilling a geopressured geothermal well the guidelines have been applied to one of the possible test sites identified by the Resource Assessment Phase I of the project. The specific site is the Armstrong lease in the Candelaria Field in Kenedy County, Texas. Offset well information including bit records, drilling fluid programs, formation pressure encountered and casing programs for the Armstrong No. 20 and No. 22 wells are presented. Based on this information a preliminary drilling program has been prepared. Well completion and production considerations were taken into account in the preparation of the drilling program. A brief description of drilling operations is also included to clarify the terminology used.

  5. Modeling of Methane Migration in Shallow Aquifers from Shale Gas Well Drilling.

    Science.gov (United States)

    Zhang, Liwei; Soeder, Daniel J

    2016-05-01

    The vertical portion of a shale gas well, known as the "tophole" is often drilled using an air-hammer bit that may introduce pressures as high as 2400 kPa (350 psi) into groundwater while penetrating shallow aquifers. A 3-D TOUGH2 model was used to simulate the flow of groundwater under the high hydraulic heads that may be imposed by such trapped compressed air, based on an observed case in West Virginia (USA) in 2012. The model realizations show that high-pressure air trapped in aquifers may cause groundwater to surge away from the drill site at observable velocities. If dissolved methane is present within the aquifer, the methane can be entrained and transported to a maximum distance of 10.6 m per day. Results from this study suggest that one cause of the reported increase in methane concentrations in groundwater near shale gas production wells may be the transport of pre-existing methane via groundwater surges induced by air drilling, not necessarily direct natural gas leakage from the unconventional gas reservoir. The primary transport mechanisms are advective transport of dissolved methane with water flow, and diffusive transport of dissolved methane.

  6. 30 CFR 250.422 - When may I resume drilling after cementing?

    Science.gov (United States)

    2010-07-01

    ... OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... composition, effects of nippling down, presence of potential drilling hazards, well conditions during drilling... 30 Mineral Resources 2 2010-07-01 2010-07-01 false When may I resume drilling after cementing?...

  7. Fifth DOE symposium on enhanced oil and gas recovery and improved drilling technology. Volume 2. Oil

    Energy Technology Data Exchange (ETDEWEB)

    Linville, B. [ed.

    1979-01-01

    Volume 2 contains papers from the following sessions: residual oil determination; thermal methods; heavy oil-tar sands; technology transfer; and carbon dioxide flooding. Individual papers were processed.

  8. 45130-Drilling Crew First Enter into the International Drilling Market

    Institute of Scientific and Technical Information of China (English)

    Song Zhixian; Drilling

    1995-01-01

    @@ 45130-Drilling Crew subordinate to the Fourth Drilling Company of Zhongyuan Petroleum Exploration Bureau, won the two bids of risk exploration drilling projects, respectively for China Ltd. Co. of New Zealand Petroleum Exploration Company worked in the Dongtinghu Basin in 1992 and Amoco Orient Oil Co.worked in the Fuyang area, Anhui Province in November of 1993.According to the two contracts that have been signed, the two drilling wells were successfully completed,all drilling parameters are in accordance with the requirements of both contracts.

  9. Use of Cutting-Edge Horizontal and Underbalanced Drilling Technologies and Subsurface Seismic Techniques to Explore, Drill and Produce Reservoired Oil and Gas from the Fractured Monterey Below 10,000 ft in the Santa Maria Basin of California

    Energy Technology Data Exchange (ETDEWEB)

    George Witter; Robert Knoll; William Rehm; Thomas Williams

    2005-09-29

    This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were

  10. Use of Cutting-Edge Horizontal and Underbalanced Drilling Technologies and Subsurface Seismic Techniques to Explore, Drill and Produce Reservoired Oil and Gas from the Fractured Monterey Below 10,000 ft in the Santa Maria Basin of California

    Energy Technology Data Exchange (ETDEWEB)

    George Witter; Robert Knoll; William Rehm; Thomas Williams

    2005-09-29

    This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were

  11. DEVELOPMENT OF GLASS AND GLASS CERAMIC PROPPANTS FROM GAS SHALE WELL DRILL CUTTINGS

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, F.; Fox, K.

    2013-10-02

    The objective of this study was to develop a method of converting drill cuttings from gas shale wells into high strength proppants via flame spheroidization and devitrification processing. Conversion of drill cuttings to spherical particles was only possible for small particle sizes (< 53 {micro}m) using a flame former after a homogenizing melting step. This size limitation is likely to be impractical for application as conventional proppants due to particle packing characteristics. In an attempt to overcome the particle size limitation, sodium and calcium were added to the drill cuttings to act as fluxes during the spheroidization process. However, the flame former remained unable to form spheres from the fluxed material at the relatively large diameters (0.5 - 2 mm) targeted for proppants. For future work, the flame former could be modified to operate at higher temperature or longer residence time in order to produce larger, spherical materials. Post spheroidization heat treatments should be investigated to tailor the final phase assemblage for high strength and sufficient chemical durability.

  12. Slender wells and new subsea solutions for increased oil recovery

    Energy Technology Data Exchange (ETDEWEB)

    Faanes, Audun; Myhre, Erling; Vinge, Torstein; Stroem, Steinar

    2010-07-01

    Statoil has identified cost effective subsea wells as one of our major challenges. To achieve such solutions it is required to look at all sides of a subsea development. This presentation will cover how a slim wellhead, BOP and riser system will contribute to a less costly subsea development. The focus will be on all aspects of a subsea development. The effect on the drilling rig will be discussed based on the fact that the drilling rig is the major cost driver in subsea well developments. (Author)

  13. 国际油气井钻头进展概述(二)——FuseTek融合钻头与Pexus组合钻头%International Advancement of Drilling Bits for Oil and Gas Well ( 2 ) —FuseTek Bit and Pexus Hybrid Bit

    Institute of Scientific and Technical Information of China (English)

    左汝强

    2016-01-01

    NOV公司2013年向市场推出FuseTek融合钻头. 它将PDC钻头的高钻速与孕镶金刚石钻头的耐磨性结合于一体,适宜于钻进中硬—坚硬、高研磨性地层. FuseTek钻头已广泛应用于刚果、厄瓜多尔、中国、哥伦比亚等国家. 应用表明,该新型组合钻头比PDC钻头或牙轮钻头钻进效率提高许多,工作寿命增加1~3倍或更多. Shear Bits公司于2014年推出Pexus组合钻头. 该钻头广泛应用于加拿大冰川冰碛物钻进. 地层上部硬卵砾石层利用可转动硬质合金齿钻进,下部软砂岩与页岩则运用PDC碎岩. 整个冰碛物地层用一个Pexus钻头一钻到底. 所述3类组合式钻头(含Kymera钻头)对于未来实现"一个钻头,一口井"的目标有重要意义.%FuseTek bit, a PDC+Impregnated diamond hybrid bit, launched by NOV in 2013.It is suitable for drilling me-dium-hard to hard and abrasion formations.The FuseTek bits were widely used in Congo, Ecuador, China, Colombia, etc., Applications have shown that the FuseTek bits could increase the ROP obviously and bit life 1-3 times or more com-pared with PDC bit or roller cone bit .Pexus hybrid bit, a PDC+Carbide hybrid bit, launched by Shear Bits in 2014, which used extensively in Western Canada to drill glacial till, comprised of a hard top layer of boulders, drilled by rotary carbide element and a soft bottom layer of sand and shales drilled by PDC cutters.The whole interval can be drilled in one run with one Pexus bit.Those three types of hybrid bits are significant for realization of"one bit, one well" in the future.

  14. Key technologies for well drilling and completion in ultra-deep sour gas reservoirs, Yuanba Gasfield, Sichuan Basin

    Directory of Open Access Journals (Sweden)

    Jiaxiang Xia

    2016-12-01

    Full Text Available The Yuanba Gasfield is a large gas field discovered by Sinopec in the Sichuan Basin in recent years, and another main exploration area for natural gas reserves and production increase after the Puguang Gasfield. The ultra-deep sour gas reservoir in the Yuanba Gasfield is characterized by complicated geologic structure, deep reservoirs and complex drilled formation, especially in the continental deep strata which are highly abrasive with low ROP (rate of penetration and long drilling period. After many years of drilling practice and technical research, the following six key drilling and completion technologies for this type reservoir are established by introducing new tools and technologies, developing specialized drill bits and optimizing drilling design. They are: casing program optimization technology for ROP increasing and safe well completion; gas drilling technology for shallow continental strata and high-efficiency drilling technology for deep high-abrasion continental strata; drilling fluid support technologies of gas–liquid conversion, ultra-deep highly-deviated wells and horizontal-well lubrication and drag reduction, hole stability control and sour gas contamination prevention; well cementing technologies for gas medium, deep-well long cementing intervals and ultra-high pressure small space; horizontal-well trajectory control technologies for measuring instrument, downhole motor optimization and bottom hole assembly design; and liner completion modes and completion string optimization technologies suitable for this gas reservoir. Field application shows that these key technologies are contributive to ROP increase and efficiency improvement of 7000 m deep horizontal wells and to significant operational cycle shortening.

  15. Transesterification reaction for synthesis of palm-based ethylhexyl ester and formulation as base oil for synthetic drilling fluid.

    Science.gov (United States)

    Abdul Habib, Nor Saiful Hafiz; Yunus, Robiah; Rashid, Umer; Taufiq-Yap, Yun H; Abidin, Zurina Zainal; Syam, Azhari Muhammad; Irawan, Sonny

    2014-01-01

    The use of vegetable oil-based ester as a base fluid in synthetic drilling fluid has become a trend in drilling operations due to its environmental advantages. The transesterification reaction of palm oil methyl ester (POME) with 2-ethylhexanol (2EH) produced 98% of palm oil-based ethylhexyl ester in less than 30 minutes. Since the transesterification reaction of POME with 2EH is a reversible reaction, its kinetics was studied in the presence of excess EH and under vacuum. The POME-to-EH molar ratio and vacuum pressure were held constant at 1:2 and 1.5 mbar respectively and the effects of temperature (70 to 110°C) were investigated. Using excess of EH and continual withdrawal of methanol via vacuum promoted the reaction to complete in less than 10 minutes. The rate constant of the reaction (k) obtained from the kinetics study was in the range of 0.44 to 0.66 s⁻¹ and the activation energy was 15.6 kJ.mol⁻¹. The preliminary investigations on the lubrication properties of drilling mud formulated with palm oil-based 2EH ester indicated that the base oil has a great potential to substitute the synthetic ester-based oil for drilling fluid. Its high kinematic viscosity provides better lubrication to the drilling fluid compared to other ester-based oils. The pour point (-15°C) and flash point (204°C) values are superior for the drilling fluid formulation. The plastic viscosity, HPHT filtrate loss and emulsion stability of the drilling fluid had given acceptable values, while gel strength and yield point could be improved by blending it with proper additives.

  16. Role of environmental pollutants in liver physiology: special references to peoples living in the oil drilling sites of Assam.

    Science.gov (United States)

    Dey, Tapan; Gogoi, Kabita; Unni, Balagopalan; Bharadwaz, Moonmee; Kalita, Munmi; Ozah, Dibyajyoti; Kalita, Manoj; Kalita, Jatin; Baruah, Pranab Kumar; Bora, Thaneswar

    2015-01-01

    The populations residing near polluted sites are more prone to various types of diseases. The important causes of air pollution are the suspended particulate matter, respirable suspended particulate matter, sulfur dioxide and nitrogen dioxide. As limited information is available enumerating the effect of these pollutants on liver physiology of the population living near the polluted sites; in the present study, we tried to investigate their effect on liver of the population residing near the oil drilling sites since birth. In this study, a randomly selected 105 subjects (46 subjects from oil drilling site and 61 subjects from control site) aged above 30 years were taken under consideration. The particulate matter as well as the gaseous pollutants, sulfur dioxide and nitrogen dioxide, were analyzed through a respirable dust sampler. The level of alkaline phosphatase, alanine transaminase and aspartate transaminase enzymes in serum were measured by spectrophotometer. The generalized regression model studies suggests a higher concentration of respirable suspended particulate matter, suspended particulate matter and nitrogen dioxide lowers the alkaline phosphatase level (pparticulate matter and nitrogen dioxide in air was associated with increase in alanine transaminase level (pliver abnormality or injury of populations living in polluted sites.

  17. Polymer injection for stimulation or plugging of oil, gas or water wells

    Energy Technology Data Exchange (ETDEWEB)

    Lakatos, I.; Kretzschmar, H.J.; Czolbe, P.; Bittkow, P.; Wassermann, I.

    1988-01-01

    Polymer solutions are appropriate not only for mobility control of flooding volume but for an even wider range of applications, e.g. as a working fluid in and around the well. Owing to adjustible fluidic properties of polymer solutions to which by variation of recipe even rubber seal quality can be given, methods of well-treatment for temporary or permanent, selective or complete tightening have become possible. Selective water sealing applied to oil wells in Hungary resulted in additional oil recovery at low cost. In gas wells this method has not yet stood its test, however, resulted in reduced water/gas-ratio. Complete inflow-preventive tightening to the effect of secondary sealing or plugging of wells has become an established technique. Further applications, e.g. inside drilling holes and behind casings, are possible.

  18. Use of Cutting-Edge Horizontal and Underbalanced Drilling Technologies and Subsurface Seismic Techniques to Explore, Drill and Produce Reservoired Oil and Gas from the Fractured Monterey Below 10,000 ft in the Santa Maria Basin of California

    Energy Technology Data Exchange (ETDEWEB)

    George Witter; Robert Knoll; William Rehm; Thomas Williams

    2006-06-30

    This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were

  19. USE OF CUTTING-EDGE HORIZONTAL AND UNDERBALANCED DRILLING TECHNOLOGIES AND SUBSURFACE SEISMIC TECHNIQUES TO EXPLORE, DRILL AND PRODUCE RESERVOIRED OIL AND GAS FROM THE FRACTURED MONTEREY BELOW 10,000 FT IN THE SANTA MARIA BASIN OF CALIFORNIA

    Energy Technology Data Exchange (ETDEWEB)

    George Witter; Robert Knoll; William Rehm; Thomas Williams

    2005-02-01

    This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area by Temblor Petroleum with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper

  20. USE OF CUTTING-EDGE HORIZONTAL AND UNDERBALANCED DRILLING TECHNOLOGIES AND SUBSURFACE SEISMIC TECHNIQUES TO EXPLORE, DRILL AND PRODUCE RESERVOIRED OIL AND GAS FROM THE FRACTURED MONTEREY BELOW 10,000 FT IN THE SANTA MARIA BASIN OF CALIFORNIA

    Energy Technology Data Exchange (ETDEWEB)

    George Witter; Robert Knoll; William Rehm; Thomas Williams

    2005-02-01

    This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area by Temblor Petroleum with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper

  1. The effect of an oil drilling operation on the trace metal concentrations in offshore bottom sediments of the Campos Basin oil field, SE Brazil.

    Science.gov (United States)

    Rezende, C E; Lacerda, L D; Ovalle, A R C; Souza, C M M; Gobo, A A R; Santos, D O

    2002-07-01

    The concentrations of Al, Fe, Mn, Zn, Cu, Pb, Ni, Cr, Ba, V, Sn and As in offshore bottom sediments from the Bacia de Campos oil field, SE Brazil, were measured at the beginning and at 7 months after completion of the drilling operation. Concentrations of Al, Fe, Ba, Cr, Ni and Zn were significantly higher closer to the drilling site compared to stations far from the site. Average concentrations of Al, Cu, and in particular of Ni, were significantly higher at the end of the drilling operation than at the beginning. Comparison between drilling area sediments with control sediments of the continental platform, however, showed no significant difference in trace metal concentrations. Under the operation conditions of this drilling event, the results show that while changes in some trace metal concentrations do occur during drilling operations, they are not significantly large to be distinguished from natural variability of the local background concentrations.

  2. Installation of a bio-venting remediation system using directionally drilled horizontal wells

    Energy Technology Data Exchange (ETDEWEB)

    Hardy, L. [Morrow Environmental Consultants Inc., Burnaby, BC (Canada); Stolz, A.P. [Petro-Canada, Inc. (Canada)

    1997-12-31

    The installation of a remediation system for off-site contamination was discussed. The site was contaminated with gasoline and diesel from an abandoned bulk fuel storage and distribution terminal located near a highway. The dissolved phase hydrocarbon plume extended beneath several houses down gradient of the site. Bioventing was considered to be the only remediation option to recover the liquid phase hydrocarbons beneath the highway in a way that would satisfy all the clean-up objectives and the design constraints. Bioventing is closely related to soil vapour extraction (SVE). The main difference is that in bioventing, the mechanism for removal of contaminants is bio-degradation by indigenous bacteria, whereas in SVE, contaminants are simply removed by volatilization. Bioventing systems enhance the activity of the indigenous bacteria by inducing air flow in the subsurface through the use of vapour injection or extraction wells. Two horizontal vapour extraction wells were installed with a directional drill. A soil pile was utilized as a bio-filter for the extracted hydrocarbon vapours and a backfilled trench was used to inject vapours recovered from the soil pile to the subsurface. The total mass of hydrocarbons degraded by this system in 230 days was estimated to be 1,000 kg. It was concluded that under appropriate conditions the in-situ treatment of contaminated soil using directionally drilled wells can be justified on both economic and technical grounds. 3 refs., 1 tab., 5 figs.

  3. Analysis on the nitrogen drilling accident of Well Qionglai 1 (I: Major inducement events of the accident

    Directory of Open Access Journals (Sweden)

    Yingfeng Meng

    2015-12-01

    Full Text Available Nitrogen drilling in poor tight gas sandstone should be safe because of very low gas production. But a serious accident of fire blowout occurred during nitrogen drilling of Well Qionglai 1. This is the first nitrogen drilling accident in China, which was beyond people's knowledge about the safety of nitrogen drilling and brought negative effects on the development of gas drilling technology still in start-up phase and resulted in dramatic reduction in application of gas drilling. In order to form a correct understanding, the accident was systematically analyzed, the major events resulting in this accident were inferred. It is discovered for the first time that violent ejection of rock clasts and natural gas occurred due to the sudden burst of downhole rock when the fractured tight gas zone was penetrated during nitrogen drilling, which has been named as “rock burst and blowout by gas bomb”, short for “rock burst”. Then all the induced events related to the rock burst are as following: upthrust force on drilling string from rock burst, bridging-off formed and destructed repeatedly at bit and centralizer, and so on. However, the most direct important event of the accident turns out to be the blockage in the blooie pipe from rock burst clasts and the resulted high pressure at the wellhead. The high pressure at the wellhead causes the blooie pipe to crack and trigged blowout and deflagration of natural gas, which is the direct presentation of the accident.

  4. INEL/Snake River plain geothermal drilling and testing plan - INEL - 1 well

    Energy Technology Data Exchange (ETDEWEB)

    Miller, L.G.; Prestwich, S.M.; Griffith, J.L.

    1978-12-01

    A plan for drilling a 7500 ft exploratory hole is described. This hole would be drilled at the Idaho National Engineering Laboratory, so that it could be immediately used by one of the government facilties. The plan details the hole design, describes the drilling program, proposes a testing program, and estimates costs. (MHR)

  5. Design aspects to consider during drilling and completion of wells of the pilot test in the in situ combustion project, Bare field

    Energy Technology Data Exchange (ETDEWEB)

    Vargas, D.; Garcia, J. [PDVSA Petroleos de Venezuela SA, Caracas (Venezuela, Bolivarian Republic of). Exploration and Production; PDVSA Petroleos de Venezuela SA, Caracas (Venezuela, Bolivarian Republic of). INTEVEP; Rodriguez, J.; Reverol, H. [PDVSA Petroleos de Venezuela SA, Caracas (Venezuela, Bolivarian Republic of). Exploration and Production

    2009-07-01

    This paper discussed an in situ combustion demonstration project in Venezuela's Orinoco oil belt. Unconventional drilling and completion techniques are being implemented in order to assess well performance during different phases of the combustion process. Drilling, well completion and monitoring techniques planned in each of the project's wells were described. The purpose of the project is to minimize formation damage, reduce corrosion, and prevent formation sand production. Numerical analyses, sampling studies, and laboratory experiments will be conducted in order to define well arrangement and to select completion equipment. Thermocouples, pressure chambers, and fiber optics will be used to monitor temperature and pressure rates. To date, the analyses have demonstrated that the horizontal section of the production wells must be drilled with special directional and geo-navigational tools. The selected completion equipment must allow for the installation of high capacity mechanical pumping systems. Completion equipment must be capable of performing in high temperatures and with the corrosive gases produced during the combustion process. It was concluded that casings for the wells must be centralized in order to ensure good cement placement. Real time monitoring will be conducted to control firefloods. 3 refs., 1 tab., 8 figs.

  6. Explaining Spatial Variability in Wellbore Impairment Risk for Pennsylvania Oil and Gas Wells, 2000-2014

    Science.gov (United States)

    Santoro, R.; Ingraffea, A. R.

    2015-12-01

    Previous modeling (ingraffea et al. PNAS, 2014) indicated roughly two-times higher cumulative risk for wellbore impairment in unconventional wells, relative to conventional wells, and large spatial variation in risk for oil and gas wells drilled in the state of Pennsylvania. Impairment risk for wells in the northeast portion of the state were found to be 8.5-times greater than that of wells drilled in the rest of the state. Here, we set out to explain this apparent regional variability through Boosted Regression Tree (BRT) analysis of geographic, developmental, and general well attributes. We find that regional variability is largely driven by the nature of the development, i.e. whether conventional or unconventional development is dominant. Oil and natural gas market prices and total well depths present as major influences in wellbore impairment, with moderate influences from well densities and geologic factors. The figure depicts influence paths for predictors of impairments for the state (top left), SW region (top right), unconventional/NE region (bottom left) and conventional/NW region (bottom right) models. Influences are scaled to reflect percent contributions in explaining variability in the model.

  7. Improved Tubulars for Better Economics in Deep Gas Well Drilling using Microwave Technology

    Energy Technology Data Exchange (ETDEWEB)

    Dinesh Agrawal; Paul Gigl; Mahlon Dennis

    2006-02-01

    The objective of the research program has been to improve the rate-of-penetration in deep hostile environments by improving the life cycle and performance of coiled-tubing, an important component of a deep well drilling system for oil and gas exploration. The current process of the manufacture long tubular steel products consists of shaping the tube from flat strip, welding the seam and sections into lengths that can be miles long, and coiling onto reels. However, the welds, that are a weak point, now limit the performance of the coil tubing. This is not only from a toughness standpoint but also from a corrosion standpoint. By utilizing the latest developments in the sintering of materials with microwave energy and powder metal extrusion technology for the manufacture of seamless coiled tubing and other tubular products, these problems can be eliminated. The project is therefore to develop a continuous microwave process to sinter continuously steel tubulars and butt-join them using microwave/induction process. The program started about three years ago and now we are in the middle of Phase II. In Phase I (which ended in February 2005) a feasibility study of the extrusion process of steel powder and continuously sinter the extruded tubing was conducted. The research program has been based on the development of microwave technology to process tubular specimens of powder metals, especially steels. The existing microwave systems at the Materials Research Laboratory (MRL) and Dennis Tool Company (DTC) were suitably modified to process tubular small specimens. The precursor powder metals were either extruded or cold isostatically pressed (CIP) to form tubular specimens. After conducting an extensive and systematic investigation of extrusion process for producing long tubes, it was determined that there were several difficulties in adopting extrusion process and it cannot be economically used for producing thousands of feet long green tubing. Therefore, in the Phase II the

  8. Spatial patterns of radiological dose from wells drilled near nuclear waste repositories

    Energy Technology Data Exchange (ETDEWEB)

    1980-03-31

    This report describes methodology for assessing the spatial patterns of radiological dose to man from wells drilled near nuclear waste repositories. Descriptions of the various categories of water wells and a model of a typical aquifer are presented. The equation governing the one-dimensional flow of waste in groundwater through porous media to a well is discussed. This is followed by development of a method for constructing lines of constant dose from a well located randomly in the plane of the aquifer. An area of hazard, in which the dose to man from a well exceeds a given statuatory or recommended limit, is then defined within this dose pattern. This technique is then used to compute dose and hazard profiles for wells adjacent to a repository located in either impermeable or permeable bedded salt. The repository and geologic parameters employed in this example are taken from a Lawrence Livermore Laboratory report for which this report serves as a supporting document. Scenarios with impermeable salt involve waste entering the repository through the shaft/tunnel fracture zone and exiting through a single additional flaw (borehole). Permeable-salt scenarios involve waste escaping from the repsitory through a borehole and via interstitial flow. Calculations are performed assuming both a single-layer (sandstone) aquifer and a double-layer (sandstone/shale) aquifer in the strate overlying the repository. Results indicate a time-varying area of hazard from well drilling, whose size depends on the permeability of the salt, the regional hydrology, and the surface ecosystem assumed in the potential hazard calculations.

  9. Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline

    Science.gov (United States)

    Wong, Florence L.; Rosenbauer, Robert J.; Campbell, Pamela L.; Lam, Angela; Lorenson, T.D.; Hostettler, Frances D.; Thomas, Burt

    2011-01-01

    From April 20 through July 15, 2010, an estimated 4.4 million barrels (1 barrel = 42 gallons [~700,000 cu m]) of crude oil spilled into the northern Gulf of Mexico (nGOM) from the ruptured British Petroleum (BP) Macondo-1 (M-1) well after the explosion of the drilling platform Deepwater Horizon. In addition, ~1.84 million gallons (~7,000 cu m) of hydrocarbon-based Corexit dispersants were applied to the oil both on and below the sea surface (Operational Science Advisory Team, 2010). An estimate of the total extent of the surface oil slick, derived from wind, ocean currents, aerial photography, and satellite imagery, was 68,000 square miles (~180,000 sq km; Amos and Norse, 2010). Spilled oil from this event impacted sensitive habitat along the shores of the nGOM. In response to this environmental catastrophe, the U.S. Geological Survey (USGS) collected coastal sediment and tarball samples along the shores of the nGOM from Texas to Florida before and after oil made landfall. These sites included priority areas of the nGOM at highest risk for oil contamination. These areas included coastal wetlands, shorelines, and barrier islands that could suffer severe environmental damage if a significant amount of oil came ashore. Samples were collected before oil reached land from 69 sites; 49 were revisited to collect samples after oil landfall. This poster focuses on the samples from locations that were sampled on both occasions. The USGS samples and one M-1 well-oil sample provided by BP were analyzed for a suite of diagnostic geochemical biomarkers. Aided by multivariate statistical analysis, the M-1 well oil was not detected in the samples collected before landfall but have been identified in sediment and tarballs collected from Louisiana, Alabama, Mississippi, and Florida after landfall. None of the sediment hydrocarbon extracts from Texas correlated with the M-1 well oil. Oil-impacted sediment is confined to the shoreline adjacent to the cumulative oil slick of the

  10. BioKonversion technology recovers, remediates and reuses waste and hydrocarbons from oil drilling

    Energy Technology Data Exchange (ETDEWEB)

    Topf, A.

    2008-01-15

    Houston-based Nopal Group has developed a solution to dispose of oilfield waste in a safe and cost-effective manner. The company is actively engaged in a large-scale project to remediate a 400-hectare site on the Aspheron Peninsula in Azerbaijan. The site is currently regarded as the most polluted place in the world after a century of oil extraction with little regard for the surrounding environment. The Nopal Group will use its patented BioKonversion technology, which cleanses the soil of hydrocarbons in a two-part process using a large machine known as the Green Machine. Several pipelines will need to be relocated, and ancient drilling rigs that have been there as long as 100 years will have to be dealt with. The cleanup cost has been estimated at between $20 million to $40 million, and will take between 18 and 36 months, depending on how deep into the ground the machines have to dig for hydrocarbons. The 90-foot by 40-foot machine processes drill cuttings, contaminated soil and drill fluids by first separating the dirt from the liquid hydrocarbons, which can be recycled or refined for resale. The remaining dirt, which still contains 3 to 7 percent oil, is then placed into a centrifuge and mixed with a heating agent and other elements, including naturally oleophilic kenaf powder. The process micronizes and absorbs hydrocarbons. Once the process is finished, the hydrocarbons are immediately non-detectable and non-leachable. The leftover benign dirt can be used as landfill cover, or mixed with road aggregate. BioKonversion can also be adapted for use on oil rigs. This article demonstrated that the process has clear advantages over traditional oilfield remediation methods such as land farming. Opportunities exist to utilize the process in Venezuela and Kuwait. 1 fig.

  11. Steerable percussion air drilling system

    Energy Technology Data Exchange (ETDEWEB)

    Bui, H.D.; Meyers, J.A.; Yost, A.B. II

    1998-12-31

    By increasing penetration rates and bit life, especially in hard formations, the use of down-hole air hammers in the oil field has significantly reduced drilling costs in the Northeast US and West Texas. Unfortunately, drilling by this percussion method has been limited mostly to straight hole applications. This paper presents a new concept of a percussion drilling tool which performs both the function of a down-hole hammer as well as that of a down-hole motor. Such a drilling tool, being introduced here as Steerable Percussion Air Drilling System (SPADS), eliminates the necessity to rotate the drill string and, consequently, enables the use of down-hole air hammers to drill directional wells.

  12. Application of Formation Testing While Drilling (GeoTap) for acquiring formation pressure data from the Azeri, Chirag and Guneshli wells which were drilled in the Khazarian-Caspian Sea of the Azerbaijan Republic

    Science.gov (United States)

    Amirov, Elnur

    2016-04-01

    A new technology to acquire wireline quality pressure tests using a Logging While Drilling approach has been successfully implemented few years ago in Azeri, Chirag and Guneshli wells which were drilled in the Khazarian-Caspian Sea of the Azerbaijan Republic. The Formation Tester While Drilling tool (GeoTap) uses a testing sequence similar to wireline tools. A single probe is extended to the borehole wall and a small pretest volume withdrawn from the formation. The resulting pressure transient is then analyzed for formation pressure, formation permeability and mobility information. Up-link and down-link capabilities have been added to achieve test control and quality feedback. An efficient downlink algorithm is used downhole to analyze the data. The parameters and pressure data are transmitted to the surface in real-time for continuous monitoring of the test. More detailed pressure data is recorded and retrieved after returning to surface. Use of a quartz gauge allows excellent accuracy. Azeri, Chirag and Guneshli fields consist of layered sand reservoirs alternation with shale sequences and detailed pressure data is acquired on a high percentage of wells in order to understand lateral and vertical continuity of different flow units. The formation tester can be utilized with the 'triple combo' Logging While Drilling string which eliminates the need to rig up wireline on many wells. Wireline formation tester runs are time consuming - particularly if high deviation or high overbalance conditions are encountered requiring pipe conveyed techniques. Non-Productive Time is high when the wireline tools are stuck and fishing operations are required. The Sperry Drilling GeoTap formation pressure tester service provides real-time formation pressure measurements. It bridges the critical gap between drilling safety and optimization, by providing early and reliable measurements of key reservoir properties, while improving reservoir understanding and completion design in real

  13. Discharge of treated wastewater from drilling exploratory wells by infiltration of hydrocarbons in the ground; Vertido de aguas residuales tratadas provenientes de pozos de perforacion exploratoria de hidrocarburos mediante la infiltracion en el terreno

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Miranda, J. P.

    2009-07-01

    The discharge of treated waste water from a well drilling exploratory oil, such as the consideration ser out to determine the minimum area needed to saturate the ground is not where he planned the infiltration of the dumping in special conditions of soil type and permeability, limited space, water quality and influence of underground aquifers in the study area. (Author) 16 refs.

  14. Stress determination and geomechanical stability analysis of an oil well of Iran

    Indian Academy of Sciences (India)

    Ayub Elyasi; Kamran Goshtasbi; Omid Saeidi; Seyed Rahman Torabi

    2014-02-01

    In this paper, a numerical model using three-dimensional finite difference code FLAC3D is proposed for analysing the stability of an oil well drilled in four formations. Normalized Yielded Zone Area (NYZA, i.e., the ratio of surrounding yielded cross-sectional area to initial area of well) has been determined for different mud pressures. In each formation, by interpolating of obtained NYZA equal to one, the optimized mud pressure was determined using MATLAB software. Practical data including geomechanical parameters along with drilling data from one of Iranian oilfields, Mansouri-54 well have been utilized in this analysis. in situ stress was determined using stress polygon method and conducting hydraulic fracturing data in the field. Analytical solution using the Mogi–Coulomb and the Hoek–Brown failure criteria has been carried out and results are compared with the presented model. The results demonstrated that the NYZA and Hoek–Brown criteria might underestimate and overestimate the drilling mud pressure, respectively, and should be used cautiously. In the inclined section of the well, plastic zone showed more extension in the lower part than upper part of the well because of the high stress concentration.

  15. A physiological estimate of the difficulty and stress of work performed by oil well drillers

    Energy Technology Data Exchange (ETDEWEB)

    Nabieva, G.V.; Gimranov, R.M.

    1979-01-01

    The results of comprehensive physiological studies and pulsometry methods allow the labor of workers involved in oil well drilling to be placed in category III (heavy labor) in terms of difficulty; and strenuous, in terms of stress. The average shift intensity of functional stress on the cardiovascular system for all the professions studied exceeds the maximum allowable level established at a heart beat rate of 100 beats/min, which indicates the necessity of regulating work loads. To optimize driller working conditions and regulation of the physical loads, an improved regime of work and rest has been developed with introduction of regulated rests for meals and rest, which has been introduced and tested in the drill crews of the associations Bashnyeft' and Kuybyshevnyeft'.

  16. Determination of natural radioactivity in irrigation water of drilled wells in northwestern Saudi Arabia.

    Science.gov (United States)

    Alkhomashi, N; Al-Hamarneh, Ibrahim F; Almasoud, Fahad I

    2016-02-01

    The levels of natural radiation in bedrock groundwater extracted from drilled wells in selected farms in the northwestern part of Saudi Arabia were addressed. The investigated waters form a source of irrigation for vegetables, agricultural crops, wheat, and alfalfa to feed livestock consumed by the general public. Information about water radioactivity in this area is not available yet. Therefore, this study strives to contribute to the quality assessment of the groundwater of these wells that are drilled into the non-renewable Saq sandstone aquifer. Hence, gross alpha and beta activities as well as the concentrations of (224)Ra, (226)Ra, (228)Ra, (234)U, (238)U, and U(total) were measured, compared to national and international limits and contrasted with data quoted from the literature. Correlations between the activities of the analyzed radionuclides were discussed. The concentrations of gross alpha and beta activities as well as (228)Ra were identified by liquid scintillation counting whereas alpha spectrometry was used to determine (224)Ra, (226)Ra, (234)U and (238)U after separation from the matrix by extraction chromatography. The mean activity concentrations of gross α and β were 3.15 ± 0.26 Bq L(-1) and 5.39 ± 0.44 Bq L(-1), respectively. Radium isotopes ((228)Ra and (226)Ra) showed mean concentrations of 3.16 ± 0.17 Bq L(-1) and 1.12 ± 0.07 Bq L(-1), respectively, whereas lower levels of uranium isotopes ((234)U and (238)U) were obtained.

  17. Feasibility of Optimizing and Reserves from a Mature and Geological Complex Multiple Turbidite Offshore California Reservoir Through the Drilling and Completion of a Trilateral Horizontal Well.

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-06-01

    The main objective of this project is to devise an effective re- development strategy to combat producibility problems related to the Repetto turbidite sequences of the Carpinteria Field. The lack of adequate reservoir characterization, high-water cut production, and scaling problems have in the past contributed to the field`s low productivity. To improve productivity and enhance recoverable reserves, the following specific goals were proposed: (1) Develop an integrated database of all existing data from work done by the former ownership group. (2) Expand reservoir drainage and reduce sand problems through horizontal well drilling and completion. (3) Operate and validate reservoir`s conceptual model by incorporating new data from the proposed trilateral well. (4) Transfer methodologies employed in geologic modeling and drilling multilateral wells to other operators with similar reservoirs. Pacific Operators Offshore, Inc. with the cooperation of its team members; the University of Southern California; Schlumberger; Baker Oil Tools; Halliburton Energy Services and Coombs and Associates undertook a comprehensive study to reexamine the reservoir conditions leading to the cent field conditions and to devise methodologies to mitigate the producibility problems. A computer based data retrieval system was developed to convert hard copy documents containing production, well completion and well log data into easily accessible on-line format. To ascertain the geological framework of the reservoir, a thorough geological modeling and subsurface mapping of the Carpinteria field was developed. The model is now used to examine the continuity of the sands, characteristics of the sub-zones, nature of water influx and transition intervals in individual major sands. The geological model was then supplemented with a reservoir engineering study of spatial distribution of voidage in individual layers using the production statistics and pressure surveys. Efforts are continuing in

  18. 40 CFR Appendix 5 to Subpart A of... - Determination of Crude Oil Contamination in Non-Aqueous Drilling Fluids by Gas Chromatography...

    Science.gov (United States)

    2010-07-01

    ... determines crude (formation) oil contamination, or other petroleum oil contamination, in non-aqueous drilling... method blanks. Specific selection of reagents and purification of solvents by distillation in all-glass...

  19. Oil Well Top Hole Locations, State-oil-08-08, Published in 2008, Duchesne County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, was produced all or in part from Other information as of 2008. It is described as 'State-oil-08-08'. Data by this publisher...

  20. Oil Well Top Hole Locations, Oil-May-2006, Published in 2007, Duchesne County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, was produced all or in part from Other information as of 2007. It is described as 'Oil-May-2006'. Data by this publisher...

  1. Recovery of benthic megafauna from anthropogenic disturbance at a hydrocarbon drilling well (380 m depth in the Norwegian Sea.

    Directory of Open Access Journals (Sweden)

    Andrew R Gates

    Full Text Available Recovery from disturbance in deep water is poorly understood, but as anthropogenic impacts increase in deeper water it is important to quantify the process. Exploratory hydrocarbon drilling causes physical disturbance, smothering the seabed near the well. Video transects obtained by remotely operated vehicles were used to assess the change in invertebrate megafaunal density and diversity caused by drilling a well at 380 m depth in the Norwegian Sea in 2006. Transects were carried out one day before drilling commenced and 27 days, 76 days, and three years later. A background survey, further from the well, was also carried out in 2009. Porifera (45% of observations and Cnidaria (40% dominated the megafauna. Porifera accounted for 94% of hard-substratum organisms and cnidarians (Pennatulacea dominated on the soft sediment (78%. Twenty seven and 76 days after drilling commenced, drill cuttings were visible, extending over 100 m from the well. In this area there were low invertebrate megafaunal densities (0.08 and 0.10 individuals m(-2 in comparison to pre-drill conditions (0.21 individuals m(-2. Three years later the visible extent of the cuttings had reduced, reaching 60 m from the well. Within this area the megafaunal density (0.05 individuals m(-2 was lower than pre-drill and reference transects (0.23 individuals m(-2. There was a significant increase in total megafaunal invertebrate densities with both distance from drilling and time since drilling although no significant interaction. Beyond the visible disturbance there were similar megafaunal densities (0.14 individuals m(-2 to pre-drilling and background surveys. Species richness, Shannon-Weiner diversity and multivariate techniques showed similar patterns to density. At this site the effects of exploratory drilling on megafaunal invertebrate density and diversity seem confined to the extent of the visible cuttings pile. However, elevated Barium concentration and reduced sediment grain size

  2. Drilling Optimization: A Review

    Directory of Open Access Journals (Sweden)

    Abhilash M Bharadwaj

    2013-06-01

    Full Text Available With rapidly growing global demand for energy resources, oil and gas exploration & production companies face mounting pressure to maximize supply and increase the rate of discovery for new energy sources. Increasingly operating in more remote locations and investing heavily in equipment and facilities, companies face greater financial and operational risks than ever before. Optimization of drilling parameters during drilling operations aims to optimize weight on bit, bit rotation speed for obtaining maximum drilling rate as well as minimizing the drilling cost. Communication and computer technologies are among the most important disciplines which can contribute to drilling optimization. Large amount of data could be piped through different locations on the planet in reliable and time efficient manners.

  3. Drilling Optimization: A Review

    Directory of Open Access Journals (Sweden)

    Vinayaka S

    2012-08-01

    Full Text Available With rapidly growing global demand for energy resources, oil and gas exploration & production companies face mounting pressure to maximize supply and increase the rate of discovery for new energy sources. Increasingly operating in more remote locations and investing heavily in equipment and facilities, companies face greater financial and operational risks than ever before. Optimization of drilling parameters during drilling operations aims to optimize weight on bit, bit rotation speed for obtaining maximum drilling rate as well as minimizing the drilling cost. Communication and computer technologies are among the most important disciplines which can contribute to drilling optimization. Large amount of data could be piped through different locations on the planet in reliable and time efficient manners.

  4. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman R. Morrow

    2004-05-01

    We report on progress in three areas. In part one, the wetting effects of synthetic base oils are reported. Part two reports progress in understanding the effects of surfactants of known chemical structures, and part three integrates the results from surface and core tests that show the wetting effects of commercial surfactant products used in synthetic and traditional oil-based drilling fluids. An important difference between synthetic and traditional oil-based muds (SBM and OBM, respectively) is the elimination of aromatics from the base oil to meet environmental regulations. The base oils used include dearomatized mineral oils, linear alpha-olefins, internal olefins, and esters. We show in part one that all of these materials except the esters can, at sufficiently high concentrations, destabilize asphaltenes. The effects of asphaltenes on wetting are in part related to their stability. Although asphaltenes have some tendency to adsorb on solid surfaces from a good solvent, that tendency can be much increased near the onset of asphaltene instability. Tests in Berea sandstone cores demonstrate wetting alteration toward less water-wet conditions that occurs when a crude oil is displaced by paraffinic and olefinic SBM base oils, whereas exposure to the ester products has little effect on wetting properties of the cores. Microscopic observations with atomic forces microscopy (AFM) and macroscopic contact angle measurements have been used in part 2 to explore the effects on wetting of mica surfaces using oil-soluble polyethoxylated amine surfactants with varying hydrocarbon chain lengths and extent of ethoxylation. In the absence of water, only weak adsorption occurs. Much stronger, pH-dependent adsorption was observed when water was present. Varying hydrocarbon chain length had little or no effect on adsorption, whereas varying extent of ethoxylation had a much more significant impact, reducing contact angles at nearly all conditions tested. Preequilibration of

  5. A Proposal for Research and Development of an Explosive Drilling Technique for Geothermal Wells

    Energy Technology Data Exchange (ETDEWEB)

    None

    1975-10-01

    In order to make large scale use of the geothermal energy available it will be necessary to drill many thousands of holes deep into the earth. The objective of the proposed research is to greatly decrease drilling time and cost. Studies made of a new explosive drilling technique indicate that savings in time of from 70 to 80 percent. The research plan is to utilize explosive in the form of multiple-faced shaped charge capsules. [DJE-2005

  6. Dynamical analysis of high-pressure supercritical carbon dioxide jet in well drilling

    Institute of Scientific and Technical Information of China (English)

    DU Yu-kun; WANG Rui-he; NI Hong-jian; HUANG Zhi-yuan; LI Mu-kun

    2013-01-01

    This paper presents the design of an experimental setup and mathematical and physical models to determine the dynamical characteristics of the high-pressure supercritical carbon dioxide (SC-CO2) jet with a highly potential applications in the well drilling.The effects of three major factors on the wellbore dynamical characteristics of the high-pressure SC-CO2 jet,i.e.,the nozzle diameter,the standoff distance and the jet pressure are determined.It is indicated that the pressure of CO2 reduces severely in the SC-CO2 jet impact process.It is also found that the bottom-hole pressure and the temperature increase as the nozzle diameter increases but decrease with the increase of the standoff distance.The higher the jet pressure at the wellbore inlet is,the higher the pressure and the lower the temperature at the bottom-hole will be.

  7. Origin of a rhyolite that intruded a geothermal well while drilling at the Krafla volcano, Iceland

    Science.gov (United States)

    Elders, W.A.; Fridleifsson, G.O.; Zierenberg, R.A.; Pope, E.C.; Mortensen, A.K.; Gudmundsson, A.; Lowenstern, J. B.; Marks, N.E.; Owens, L.; Bird, D.K.; Reed, M.; Olsen, N.J.; Schiffman, P.

    2011-01-01

    Magma flowed into an exploratory geothermal well at 2.1 km depth being drilled in the Krafla central volcano in Iceland, creating a unique opportunity to study rhyolite magma in situ in a basaltic environment. The quenched magma is a partly vesicular, sparsely phyric, glass containing ~1.8% of dissolved volatiles. Based on calculated H2O-CO2 saturation pressures, it degassed at a pressure intermediate between hydrostatic and lithostatic, and geothermometry indicates that the crystals in the melt formed at ~900 ??C. The glass shows no signs of hydrothermal alteration, but its hydrogen and oxygen isotopic ratios are much lower than those of typical mantle-derived magmas, indicating that this rhyolite originated by anhydrous mantle-derived magma assimilating partially melted hydrothermally altered basalts. ?? 2011 Geological Society of America.

  8. 套管钻井技术在委内瑞拉ZM-351井的应用%Application of casing drilling technology in ZM-351 well in Venezuela

    Institute of Scientific and Technical Information of China (English)

    于顺明; 常淑敏

    2009-01-01

    ZM-351 is one experimental surface casing drilling well with diameter of 339.7 mm, which is located in block CAMPO MATA, Anaco Oil Filed of PDVSA. The well adopts the advanced international casing drilling technology, i.e. top drill lock assembly & bottom drill lock device. Compared with the close wells that are the same well structure and at the same block, the ZM-351 well completion time is shortened, the cost is reduced, and fully showing the advantage of casing drilling. The thesis describes ZM-351 casing drilling process, casing drilling key technology, drilling rig selection and its accessories and etc. so as to provide some experience for casing drilling in China.%ZM-351井是委内瑞拉国家石油公司PDVSA在东部ANACO油田CAMPO MATA区块的一口Φ339.7 mm套管钻井技术试验井.该井采用了国际先进的套管钻井顶部缩紧总成和底部缩紧装置,成功地完成了Φ339.7mm套管钻井技术试验,与相同区块、相同井身结构的临井相比,大大缩短了钻井周期,降低了钻井成本,充分体现了套管钻井技术的优越性.详细介绍了ZM-351井套管钻井工艺、套管钻井关键技术、钻机选型和设备配套等情况,为国内推广应用套管钻井技术提供了经验.

  9. Summary of results from a thermal gradient survey of the San Emidio wells Washoe County, Nevada, for Chevron Oil Co., Wells SE-A and SE-B, Project No. 76.112

    Energy Technology Data Exchange (ETDEWEB)

    Katzenstein, A.M.; Sanyai, S.K.

    1976-08-01

    This summary describes the results obtained from a temperature gradient survey of the San Emidio wells drilled in Washoe County, Nevada. The temperature gradient survey was performed during the month of July, 1976, by Geonomics, Inc., for the Chevron Oil Company. The approximate location of the survey is shown in Figure 1. A total of two holes were drilled with locations plotted on Figure 2.

  10. Fifth DOE symposium on enhanced oil and gas recovery and improved drilling technology. Volume 3. Gas and drilling

    Energy Technology Data Exchange (ETDEWEB)

    Linville, B. [ed.

    1979-01-01

    Volume 3 contains papers from the sessions on natural gas supporting research, western gas sands project, drilling technology, and environmental effects. Individuals were processed for inclusion in the Energy Data Base.

  11. 30 CFR 250.456 - What safe practices must the drilling fluid program follow?

    Science.gov (United States)

    2010-07-01

    ... INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling... and pull drill pipe and downhole tools at controlled rates so you do not swab or surge the well; (e... operations. You must maintain this equipment throughout the drilling of the well; (h) Before pulling...

  12. 40 CFR Appendix 6 to Subpart A of... - Reverse Phase Extraction (RPE) Method for Detection of Oil Contamination in Non-Aqueous Drilling...

    Science.gov (United States)

    2010-07-01

    ... for Detection of Oil Contamination in Non-Aqueous Drilling Fluids (NAF) 6 Appendix 6 to Subpart A of... Appendix 6 to Subpart A of Part 435—Reverse Phase Extraction (RPE) Method for Detection of Oil Contamination in Non-Aqueous Drilling Fluids (NAF) 1.0Scope and Application 1.1This method is used...

  13. The effects of diesel oil-based drilling mud extracts on immune responses of rainbow trout.

    Science.gov (United States)

    Tahir, A; Secombes, C J

    1995-07-01

    The potential suppressive effect of oil-pollution in the aquatic environment on fish immune responses was investigated by injecting rainbow trout (Oncorhychus mykiss) with an extract obtained from diesel oil-based drilling mud. To investigate the effect of the extract dose, 4 groups of 6 fish were exposed to 0, 0.6, 1.2, and 2.4 mL extract/Kg body weight (B.W.). To keep the injection volume constant, each extract dose was made up 2.4 mL/Kg B.W. with olive oil. Six weeks later the fish were sacrificed and a number of immmune parameters monitored. In a second experiment, the effect of exposure times was investigated. Fish wee exposed to 2.4 mL extract/Kg B.W., 2.4 mL olive oil/Kg B.W., or 2.4 mL saline/Kg B.W. and immune parameters were monitored 2, 4, 6 and 8 weeks post-injection. In the dose response experiment, there was no significant effect of the extract on serum immunoglobulin (Ig) levels and haemolytic complement (CH50) activity, but a suppressive effect on serum lysozyme level was found using the 0.6 mL/Kg dose. This dose also elevated proliferative activity of head kidney lymphocytes in response to the mitogen PHA. In the second experiment, investigating exposure time, again no significant overall effect on serum Ig or lysozyme level and CH50 activity was observed, although Ig levels were significantly lower at week two relative to the other groups. However, both extract- and olive oil-injected fish showed significantly lower lysozyme levels compared with the saline-injected (control) fish throughout the experiment. In contrast, at week six post-exposure, head kidney lymphocyte proliferation was significantly elevated in both the extract- and olive oil-exposed fish relative to the control fish.

  14. Unconventional neutron sources for oil well logging

    Energy Technology Data Exchange (ETDEWEB)

    Frankle, C.M., E-mail: cfrankle@lanl.gov; Dale, G.E.

    2013-09-21

    Americium–Beryllium (AmBe) radiological neutron sources have been widely used in the petroleum industry for well logging purposes. There is strong desire on the part of various governmental and regulatory bodies to find alternate sources due to the high activity and small size of AmBe sources. Other neutron sources are available, both radiological ({sup 252}Cf) and electronic accelerator driven (D–D and D–T). All of these, however, have substantially different neutron energy spectra from AmBe and thus cause significantly different responses in well logging tools. We report on simulations performed using unconventional sources and techniques to attempt to better replicate the porosity and carbon/oxygen ratio responses a well logging tool would see from AmBe neutrons. The AmBe response of these two types of tools is compared to the response from {sup 252}Cf, D–D, D–T, filtered D–T, and T–T sources. -- Highlights: • AmBe sources are widely used for well logging purposes. • Governmental bodies would prefer to minimize AmBe use. • Other neutron sources are available, both radiological and electronic. • Tritium–tritium spectrum neutrons have similar logging tool response to AmBe. • A tritium–tritium neutron generator may be a viable AmBe replacement.

  15. Oil Well Top Hole Locations, wells-08-2008, Published in 2008, Duchesne County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, was produced all or in part from Other information as of 2008. It is described as 'wells-08-2008'. Data by this publisher...

  16. Oil Well Top Hole Locations, wells-4-2008, Published in 2008, Duchesne County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, was produced all or in part from Other information as of 2008. It is described as 'wells-4-2008'. Data by this publisher...

  17. Review of Well Operator Files for Hydraulically Fractured Oil and Gas Production Wells: Well Design and Construction Fact Sheet

    Science.gov (United States)

    EPA reviewed a statistically representative sample of oil and gas production wells reported by nine service companies to help understand the role of well design and construction practices preventing pathways for subsurface fluid movement.

  18. Drilling and Testing the DOI041A Coalbed Methane Well, Fort Yukon, Alaska

    Science.gov (United States)

    Clark, Arthur; Barker, Charles E.; Weeks, Edwin P.

    2009-01-01

    The need for affordable energy sources is acute in rural communities of Alaska where costly diesel fuel must be delivered by barge or plane for power generation. Additionally, the transport, transfer, and storage of fuel pose great difficulty in these regions. Although small-scale energy development in remote Arctic locations presents unique challenges, identifying and developing economic, local sources of energy remains a high priority for state and local government. Many areas in rural Alaska contain widespread coal resources that may contain significant amounts of coalbed methane (CBM) that, when extracted, could be used for power generation. However, in many of these areas, little is known concerning the properties that control CBM occurrence and production, including coal bed geometry, coalbed gas content and saturation, reservoir permeability and pressure, and water chemistry. Therefore, drilling and testing to collect these data are required to accurately assess the viability of CBM as a potential energy source in most locations. In 2004, the U.S. Geological Survey (USGS) and Bureau of Land Management (BLM), in cooperation with the U.S. Department of Energy (DOE), the Alaska Department of Geological and Geophysical Surveys (DGGS), the University of Alaska Fairbanks (UAF), the Doyon Native Corporation, and the village of Fort Yukon, organized and funded the drilling of a well at Fort Yukon, Alaska to test coal beds for CBM developmental potential. Fort Yukon is a town of about 600 people and is composed mostly of Gwich'in Athabascan Native Americans. It is located near the center of the Yukon Flats Basin, approximately 145 mi northeast of Fairbanks.

  19. Geohydrology of Monitoring Wells Drilled in Oasis Valley near Beatty, Nye County, Nevada, 1997

    Science.gov (United States)

    Robledo, Armando R.; Ryder, Philip L.; Fenelon, Joseph M.; Paillet, Frederick L.

    1999-01-01

    Twelve monitoring wells were installed in 1997 at seven sites in and near Oasis Valley, Nevada. The wells, ranging in depth from 65 to 642 feet, were installed to measure water levels and to collect water-quality samples. Well-construction data and geologic and geophysical logs are presented in this report. Seven geologic units were identified and described from samples collected during the drilling: (1) Ammonia Tanks Tuff; (2) Tuff of Cutoff Road; (3) tuffs, not formally named but informally referred to in this report as the 'tuff of Oasis Valley'; (4) lavas informally named the 'rhyolitic lavas of Colson Pond'; (5) Tertiary colluvial and alluvial gravelly deposits; (6) Tertiary and Quaternary colluvium; and (7) Quaternary alluvium. Water levels in the wells were measured in October 1997 and February 1998 and ranged from about 18 to 350 feet below land surface. Transmissive zones in one of the boreholes penetrating volcanic rock were identified using flowmeter data. Zones with the highest transmissivity are at depths of about 205 feet in the 'rhyolitic lavas of Colson Pond' and 340 feet within the 'tuff of Oasis Valley.'

  20. Present-day stress of the central Persian Gulf: Implications for drilling and well performance

    Science.gov (United States)

    Haghi, A. H.; Kharrat, R.; Asef, M. R.; Rezazadegan, H.

    2013-11-01

    The present-day state of stress in the Persian Gulf is poorly understood but has significant impacts on well drilling and performance. The upper Permian to lower Triassic formation of Kangan/Dalan, Persian Gulf, exhibits a complex structural context in the neighborhood of the Oman Mountains and the Zagros orogenies. This formation is divided into four reservoir layers (K1 to K4) where three main lithologies (limestone, dolomite and anhydrite) are alternating. We conduct an analysis of the present-day stress and natural fractures at the wellbore using full-bore FMI logs, leak off test and density logs. For this purpose, borehole breakout and tensile fracture data are used to determine orientation of SH. Furthermore, density log, leak-off test and Kirsch equation for tensile fracture formation in the wellbores are used to calculate the magnitude of Sv, Sh and SH, respectively. Vertical stress (Sv) gradient at 3100 m depth approximates 20 MPa/km (2.9 psi/m), indicating a bulk density of 2.04 g/cm3. A total of 131 drilling induced tensile fractures and 21 breakouts with an overall length of 262 m are observed in two wells, indicating a mean maximum horizontal stress (SH) orientation of N53° (± 18.45°) for drilling-induced tensile fracture (DITF) data and N50° (± 10.79°) for breakout data. The mean orientation of SH rotates counterclockwise with depth from K2 (N70° ± 4.2°) to K4 (N40° ± 5.1°) reservoirs. Noticed correlation between these data and stress orientations from earthquake focal mechanism solution, first of all, indicates that the stresses are linked to the resistance forces generated by the Arabia-Eurasia collision at the Zagros orogeny and secondly confirms the reliability of focal mechanism solution data near continental collision zones. In the Kangan/Dalan Formation, the NW-SE main open fracture direction is found as a common regional direction which is sub-perpendicular to the present-day maximum horizontal stress. Minimum horizontal stress (Sh

  1. Oil and Natural Gas Wells, Western U.S.

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — A complete set of wells associated with oil, natural gas, and coal bed natural gas development in the western states as of June 2004. This is a static dataset even...

  2. Oil Well Bottom Hole Locations, Published in 2006, Farmer.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Bottom Hole Locations dataset as of 2006. Data by this publisher are often provided in Not Sure coordinate system; in a Not Sure projection; The extent...

  3. 浅谈水平井钻井技术现状及发展方向%Discussion on Current Situation and Development Direction of Horizontal Well Drilling Technology

    Institute of Scientific and Technical Information of China (English)

    张琦

    2015-01-01

    水平井钻井技术的发展对油井产量提高以及油田采收率提高都起到了至关重要的作用,水平井钻井技术的出现是石油钻井技术方面重大的突破。本文结合对国内外水平井钻井技术的现状分析,使我们充分了解到国内技术的差距,以便我们在今后技术改进方面有一个方向。%The development of horizontal well drilling technology plays an important role in improving the output of oil well and improving oil recovery efficiency, and the appearance of horizontal well drilling technology is a major breakthrough in oil drilling technology. Combined with the current situation of horizontal well drilling technology in the domestic and foreign, this paper enables us to fully understand the domestic technology gap which is for our technological improvements in the future.

  4. Approximately-Balanced Drilling in Daqing Oilfield

    Institute of Scientific and Technical Information of China (English)

    Xia Bairu; Zheng Xiuhua; Li Guoqing; Tian Tuo

    2004-01-01

    The Daqing oilfield is a multilayered heterogeneous oil field where the pressure are different in the same vertical profile causing many troubles to the adjustment well drillings. The approximately-balanced drilling technique has been developed and proved to be efficient and successful in Daqing oilfield. This paper discusses the application of approximately-balanced drilling technique under the condition of multilayered pressure in Daqing oilfield, including the prediction of formation pressure, the pressure discharge technique for the drilling well and the control of the density of drilling fluid.

  5. Probabilistic risk analysis of casing drilling operation for an onshore Brazilian well; Analise probabilistica de risco de uma operacao de casing drilling para um poco terrestre no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Jacinto, Carlos M.C.; Petersen, Flavia C.; Placido, Joao C.R. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Garcia, Pauli A.A. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2008-07-01

    In the present paper, one presents an approach to hazard identification and risks quantification concerning the use of retrievable BHA, of a casing drilling system, in 12 1/4 phase of an onshore well. The adopted approach can be subdivided as: execution of a hazard and operability study; prioritization of critical deviance; modeling of critical deviance by mean of event sequence diagram, fault tree and Bayesian network; modeling and simulation of a dynamic decision tree and experts' opinion analysis. As results, one has obtained: the time distribution to achieve the different ends modeled in the decision tree, i.e., sidetrack, or operation canceling, or success; the probabilities to achieve each modeled end and all recommendation to improve the success probability. The approach proved to be efficient in order that it presents significant results to support the decisions involving the casing drilling operations. (author)

  6. Horizontal well performance in Hassi-Messaoud oil field, Algeria

    Energy Technology Data Exchange (ETDEWEB)

    Azzouguen, A.; Mazouzi, A.; Delhomme, A.; Deghmoum, A. [Sonatrach Inc., Hydra, (Algeria)

    2000-11-01

    The performance of non-conventional wells drilled in Hassi-Messaoud field in Algeria was analyzed using a pressure transient analysis technique called Tiab's direct synthesis (TDS). This technique makes it possible to determine the permeability tensor and the effective length of horizontal wells. Transient tests were analyzed using the TDS method for 33 non-conventional wells. For the first time it was possible to obtain the permeability tensor and the vertical permeability anisotropy. Future horizontal well drilling can now be optimized through sensitivity studies. The performance of slanted horizontal and multilateral wells was also compared. It was determined that because of their low risk, slanted wells are more appropriate for the Hassi-Messaoud field. Besides improving productivity, horizontal wells have the added advantage of providing substantial information regarding the geology of the field. It was determined that the two parameters that control production are the length and the vertical permeability. Several recommendations were presented regarding the well spacing. The recommendations were based on different geological models. 21 refs., 12 figs.

  7. Chicxulub Impact Crater and Yucatan Carbonate Platform - PEMEX Oil Exploratory Wells Revisited

    Science.gov (United States)

    Pérez-Drago, G.; Gutierrez-Cirlos, A. G.; Pérez-Cruz, L.; Urrutia-Fucugauchi, J.

    2008-12-01

    Geophysical oil exploration surveys carried out by PEMEX in the 1940's revealed occurrence of an anomalous pattern of semi-circular concentric gravity anomalies. The Bouguer gravity anomalies covered an extensive area over the flat carbonate platform in the northwestern Yucatan Peninsula; strong density contrasts were suggestive of a buried igneous complex or basement uplift beneath the carbonates, which was referred as the Chicxulub structure. The exploration program carried out afterwards included a drilling program, starting with Chicxulub-1 well in 1952 and comprising eight deep boreholes through the 1970s. An aeromagnetic survey in late 1970's showed high amplitude anomalies in the gravity anomaly central sector. Thus, research showing Chicxulub as a large complex impact crater formed at the K/T boundary was built on the PEMEX decades-long exploration program. Despite frequent reference to PEMEX information and samples, original data and cores have not been openly available for detailed evaluation and integration with results from recent investigations. Core samples largely remain to be analyzed and interpreted in the context of recent marine, aerial and terrestrial geophysical surveys and the drilling/coring projects of UNAM and ICDP. In this presentation we report on the stratigraphy and paleontological data for PEMEX wells: Chicxulub- 1 (1582m), Sacapuc-1 (1530m), Yucatan-6 (1631m), Ticul-1 (3575m) Yucatan-4 (2398m), Yucatan-2 (3474m), Yucatan-5A (3003m) and Yucatan-1 (3221m). These wells remain the deepest drilled in Chicxulub, providing samples of impact lithologies, carbonate sequences and basement, which give information on post- and pre-impact stratigraphy and crystalline basement. We concentrate on stratigraphic columns, lateral correlations and integration with UNAM and ICDP borehole data. Current plans for deep drilling in Chicxulub crater target the peak ring and central sector, with offshore and onshore boreholes proposed to the IODP and ICDP

  8. Barite: a case study of import reliance on an essential material for oil and gas exploration and development drilling

    Science.gov (United States)

    Bleiwas, Donald I.; Miller, M. Michael

    2015-01-01

    Global dependence on a limited number of countries for specific mineral commodities could lead to sudden supply disruptions for the United States, and barite is one such commodity. Analyses of barite supply amounts and sources for the United States are demonstrative of mineral commodities on which the country is import reliant. Mineral commodity trade flows can be analyzed more easily than import reliances for commodities in which U.S. domestic demand is primarily met by materials contained within manufactured products, as with the rare-earth elements in cellular phones and computers. Barite plays an essential role as a weighting material in drilling muds used in oil and gas drilling, primarily to prevent the explosive release of gas and oil during drilling. The Nation’s efforts to become more energy independent are based largely on the domestic oil and gas industry’s ability to explore and develop onshore and offshore fuel deposits. These activities include increased efforts by the United States to locate and recover oil and gas within unconventional deposits, such as those in the Bakken, Eagle Ford, and Marcellus Formations, using advanced drilling technologies.

  9. Oil Well Top Hole Locations, Oil Well, Published in 2006, 1:24000 (1in=2000ft) scale, Iron County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Oil Well Top Hole Locations dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Other information as of 2006. It is described as...

  10. Oil, Gas, and Injection Wells in Louisiana, Geographic NAD83, LDNR (2007) [oil_gas_wells_LDNR_2007

    Data.gov (United States)

    Louisiana Geographic Information Center — This is a point dataset containing the location of over 230,000 oil and gas and injection wells in the state of Louisiana. It was developed from the DNR Office of...

  11. Wetting evaluation of silver based braze alloys onto zirconia metalized with reactive elements for application in oil well drill bots; Avaliacao do molhamento de ligas de adicao a base de prata sobre zirconia polida e metalizada com elementos ativos para aplicacao em brocas de perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, J.C.; Silva, J.M.; Santos, P.R.F.; Nascimento, R.M.; Martinelli, A.E. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Engenharia de Materiais], Email: jocabuzo@gmail.com; Pimenta, J.S. [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica

    2010-07-01

    Drill bits with hard ceramic inserts are often used on drilling operations. The cutting and crushing action of rocks will produce failures in the tricone bits, which are related to wear; total or partial rupture of the drill bit body or even the inserts; thermal shock and corrosion. The research of better drill bits with ceramic inserts thermally more stable and mechanically stronger, will lead to an increase of their lifetime, and so reducing costs of substitution and maintenance. In the present work, some silver based braze alloys were melted onto zirconia YSZ substrates metallized or not with active metals. inside a furnace with vacuum of 10{sup -5} mbar to evaluate the wetting behavior. The system with AgCuTi and the non metallized YSZ ceramic, showed low contact angles and stable interfaces, which may be appropriate for brazing metal/ceramic parts. (author)

  12. Applied technology in the solution of geothermal drilling problems of deep wells in La Primavera caldera (Mexico)

    Science.gov (United States)

    Santoyo-Gutiérrez, S.; García, A.; Morales, M.; Perezyera, J.; Rosas, A.

    1991-07-01

    The drilling of deep wells in the La Primavera caldera has evidenced a highly complex and hazardous problematic situation due to considerable losses of drilling fluids. Such large losses have not occurred in any other geothermal field in the world. These losses are due mainly to the structural conditions of the geological formations which are penetrated. The technology employed in the construction of deep wells has played a very important role in the solution to these problems. Field case histories describe the effectiveness of the developments of drilling fluids and cement materials in cavernous formations with severe lost-circulation problems. A processed clay bentonite was developed whose high performance and rapid hydration characteristics allowed a reduction of up to 5 hours in the drilling fluid conditioning time. Also, useful results were obtained through the development of a granular plugging mixture which maintained sealing properties at 70 kg/cm 2 under cavernous simulated conditions. This granular plugging mixture kept losses of the volume of drilling fluid under 8% with respect to the total volume. Special cement plugs with thixotropic behavior allowed the handling and placement of this slurry in the problematic zone. The CaSO 4 addition to the cement slurry was optimized so that a placement time of 30 min could be obtained. Additionally, the mechanical compressive strength values of this special cement plug ranged from 50 to 100 kg/cm 2.

  13. Recovery Act. Sub-Soil Gas and Fluid Inclusion Exploration and Slim Well Drilling, Pumpernickel Valley, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    Fairbank, Brian D. [Nevada Geothermal Power Company, Las Vegas, NV (United States)

    2015-03-27

    Nevada Geothermal Power Company (NGP) was awarded DOE Award DE-EE0002834 in January 2010 to conduct sub-soil gas and fluid inclusion studies and slim well drilling at its Black Warrior Project (now known as North Valley) in Washoe and Churchill Counties, Nevada. The project was designed to apply highly detailed, precise, low-cost subsoil and down-hole gas geochemistry methods from the oil and gas industry to identify upflow zone drilling targets in an undeveloped geothermal prospect. NGP ran into multiple institutional barriers with the Black Warrior project relating to property access and extensive cultural survey requirement. NGP requested that the award be transferred to NGP’s Pumpernickel Valley project, due to the timing delay in obtaining permits, along with additional over-budget costs required. Project planning and permit applications were developed for both the original Black Warrior location and at Pumpernickel. This included obtaining proposals from contractors able to conduct required environmental and cultural surveying, designing the two-meter probe survey methodology and locations, and submitting Notices of Intent and liaising with the Bureau of Land Management to have the two-meter probe work approved. The award had an expiry date of April 30, 2013; however, due to the initial project delays at Black Warrior, and the move of the project from Black Warrior to Pumpernickel, NGP requested that the award deadline be extended. DOE was amenable to this, and worked with NGP to extend the deadline. However, following the loss of the Blue Mountain geothermal power plant in Nevada, NGP’s board of directors changed the company’s mandate to one of cash preservation. NGP was unable to move forward with field work on the Pumpernickel property, or any of its other properties, until additional funding was secured. NGP worked to bring in a project partner to form a joint venture on the property, or to buy the property. This was unsuccessful, and NGP notified

  14. Discussion on the Application of Oil Drilling Automation Core Technology%谈石油钻井自动化核心技术的运用

    Institute of Scientific and Technical Information of China (English)

    刘源

    2012-01-01

    石油开采是我国能源供应的主要行业之一,通过对自然资源的充分挖掘利用有助于缓解国内能源危机.钻井是地下石油资源开采利用的有效方式,能够以最简化的生产工艺提高油井产量,与早期传统的生产模式相比,我国石油钻井过程在技术运用上有了很大的改善,多项自动化技术为石油企业提供了可靠的技术保障.鉴于此,本文阐述了传统石油钻井的不足,并提出先进自动化核心技术的运用情况.%Oil production is one of the major industries of China's energy supply, taking full use of natural resources will help to easing the domestic energy crisis. Drilling is an effective way of exploitation and usage of underground petroleum resources, and it can improve oil well production rate with the most simplified production process. Compared to early traditional mode of production, it has been greatly improved for China's oil drilling in the use of technology, many automation technology provide a reliable technical support for the oil companies. In view of this, the article gives the shortage of traditional oil drilling, and provides the condition of application of advanced automated core technologies.

  15. Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Chidsey, Thomas C. Jr.; Eby, David E.; Wray, Laura L.

    2001-04-19

    The primary objective of this project was to enhance domestic petroleum production by demonstration and transfer of horizontal drilling technology in the Paradox basin, Utah, Colorado, Arizona, and New Mexico. If this project can demonstrate technical and economic feasibility, then the technique can be applied to approximately 100 additional small fields in the Paradox basin alone, and result in increased recovery of 25 to 50 million barrels (40-80 million m3) of oil. This project was designed to characterize several shallow-shelf carbonate reservoirs in the Pennsylvania (Desmoinesian) Paradox Formation, choose the best candidate(s) for a pilot demonstration project to drill horizontally from existing vertical wells, monitor well performances, and report associated validation activities.

  16. Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Chidsey, Jr., Thomas C.; Eby, David E.; Wray, Laural L.

    2001-11-26

    The project's primary objective was to enhance domestic petroleum production by demonstration and transfer of horizontal drilling technology in the Paradox Basin, Utah, Colorado, Arizona, and New Mexico. If this project can demonstrate technical and economic feasibility, then the technique can be applied to approximately 100 additional small fields in the Paradox Basin alone, and result in increased recovery of 25 to 50 million barrels (4-8 million m3) of oil. This project was designed to characterize several shallow-shelf carbonate reservoirs in the Pennsylvanian (Desmoinesian) Paradox Formation, choose the best candidate(s) for a pilot demonstration project to drill horizontally from existing vertical wells, monitor well performance(s), and report associated validation activities.

  17. Bacterial communities associated with production facilities of two newly drilled thermogenic natural gas wells in the Barnett Shale (Texas, USA).

    Science.gov (United States)

    Davis, James P; Struchtemeyer, Christopher G; Elshahed, Mostafa S

    2012-11-01

    We monitored the bacterial communities in the gas-water separator and water storage tank of two newly drilled natural gas wells in the Barnett Shale in north central Texas, using a 16S rRNA gene pyrosequencing approach over a period of 6 months. Overall, the communities were composed mainly of moderately halophilic and halotolerant members of the phyla Firmicutes and Proteobacteria (classes Βeta-, Gamma-, and Epsilonproteobacteria) in both wells at all sampling times and locations. Many of the observed lineages were encountered in prior investigations of microbial communities from various fossil fluid formations and production facilities. In all of the samples, multiple H(2)S-producing lineages were encountered; belonging to the sulfate- and sulfur-reducing class Deltaproteobacteria, order Clostridiales, and phylum Synergistetes, as well as the thiosulfate-reducing order Halanaerobiales. The bacterial communities from the separator and tank samples bore little resemblance to the bacterial communities in the drilling mud and hydraulic-fracture waters that were used to drill these wells, suggesting the in situ development of the unique bacterial communities in such well components was in response to the prevalent geochemical conditions present. Conversely, comparison of the bacterial communities on temporal and spatial scales suggested the establishment of a core microbial community in each sampled location. The results provide the first overview of bacterial dynamics and colonization patterns in newly drilled, thermogenic natural gas wells and highlights patterns of spatial and temporal variability observed in bacterial communities in natural gas production facilities.

  18. Investigating Rheological Properties of High Performance Cement System for Oil Wells

    Directory of Open Access Journals (Sweden)

    Khalil Rehman Memon

    2013-10-01

    Full Text Available The main purpose of designing cement slurry for extreme and deep environment (HPHT wells is to develop high performance cement system in well bore to achieve zonal isolation. The primary objective of cement slurry is to improve rheological properties and displacement efficiency of cement system. Oil well slurries depend on its homogeneity of additive concentrations, quality and quantity to contribute the placement and success of a well drilling cementing operation. This research study is focused on the laboratory study of the High Performance Cement System (HPCS. This investigation of cement slurry was prepared with Silica Fume (SF and excess amount of water to decrease the slurry density in order to observe the rheological properties above 120C at different concentration of SF. Results indicates that the designed cement rheological properties are directly influenced by the shear rate and shear stress on the pump-ability of the cement with the increase of the SF concentration for the rheological improvement.

  19. Performance of high-rate gravel-packed oil wells

    Energy Technology Data Exchange (ETDEWEB)

    Unneland, Trond

    2001-05-01

    Improved methods for the prediction, evaluation, and monitoring of performance in high-rate cased-hole gravel-packed oil wells are presented in this thesis. The ability to predict well performance prior to the gravel-pack operations, evaluate the results after the operation, and monitor well performance over time has been improved. This lifetime approach to performance analysis of gravel-packed oil wells contributes to increase oil production and field profitability. First, analytical models available for prediction of performance in gravel-packed oil wells are reviewed, with particular emphasis on high-velocity flow effects. From the analysis of field data from three North Sea oil fields, improved and calibrated cased-hole gravel-pack performance prediction models are presented. The recommended model is based on serial flow through formation sand and gravel in the perforation tunnels. In addition, new correlations for high-velocity flow in high-rate gravel-packed oil wells are introduced. Combined, this improves the performance prediction for gravel-packed oil wells, and specific areas can be targeted for optimized well design. Next, limitations in the current methods and alternative methods for evaluation and comparison of well performance are presented. The most widely used parameter, the skin factor, remains a convenient and important parameter. However, using the skin concept in direct comparisons between wells with different reservoir properties may result in misleading or even invalid conclusions. A discussion of the parameters affecting the skin value, with a clarification of limitations, is included. A methodology for evaluation and comparison of gravel-packed well performance is presented, and this includes the use of results from production logs and the use of effective perforation tunnel permeability as a parameter. This contributes to optimized operational procedures from well to well and from field to field. Finally, the data sources available for

  20. 30 CFR 250.414 - What must my drilling prognosis include?

    Science.gov (United States)

    2010-07-01

    ... OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... must include a brief description of the procedures you will follow in drilling the well. This prognosis... 30 Mineral Resources 2 2010-07-01 2010-07-01 false What must my drilling prognosis include?...

  1. Selection of area and specific site for drilling a horizontal well in Calhoun County, West Virginia

    Energy Technology Data Exchange (ETDEWEB)

    Reeves, T.K.; Overbey, W.K. Jr.; Salamy, S.P.; Locke, C.D.

    1992-03-01

    This report discusses the data collection and analysis procedures used to establish criteria for geologic and engineering studies conducted by BDM to select a general area for more detailed study and a specific site for the drilling of a cooperative well with an industry partner, the Consolidated Natural Gas Development Company (CNGD). The results of detailed geologic studies are presented for two areas in Calhoun County, West Virginia, and one area along the Logan-Boone County line in West Virginia. The effects of Appalachian Basin tectonics and the Rome Trough Rift system were identified on seismic lines made available by (CNGD). These helped to identify and define the trapping mechanisms which had been effective in each area. Engineering analyses of past production histories provided data to support selection of target areas and then to select a specific site that met the project requirements for production, reservoir pressure, and risk. A final site was selected in Lee District at the southwestern margin of the Sand Ridge gas field based on the combination of a geologic trapping mechanism and reservoir pressures which were projected as 580 psi with a stress ratio of 0.53.

  2. Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000-2012.

    Science.gov (United States)

    Ingraffea, Anthony R; Wells, Martin T; Santoro, Renee L; Shonkoff, Seth B C

    2014-07-29

    Casing and cement impairment in oil and gas wells can lead to methane migration into the atmosphere and/or into underground sources of drinking water. An analysis of 75,505 compliance reports for 41,381 conventional and unconventional oil and gas wells in Pennsylvania drilled from January 1, 2000-December 31, 2012, was performed with the objective of determining complete and accurate statistics of casing and cement impairment. Statewide data show a sixfold higher incidence of cement and/or casing issues for shale gas wells relative to conventional wells. The Cox proportional hazards model was used to estimate risk of impairment based on existing data. The model identified both temporal and geographic differences in risk. For post-2009 drilled wells, risk of a cement/casing impairment is 1.57-fold [95% confidence interval (CI) (1.45, 1.67); P well relative to a conventional well drilled within the same time period. Temporal differences between well types were also observed and may reflect more thorough inspections and greater emphasis on finding well leaks, more detailed note taking in the available inspection reports, or real changes in rates of structural integrity loss due to rushed development or other unknown factors. Unconventional gas wells in northeastern (NE) Pennsylvania are at a 2.7-fold higher risk relative to the conventional wells in the same area. The predicted cumulative risk for all wells (unconventional and conventional) in the NE region is 8.5-fold [95% CI (7.16, 10.18); P wells drilled in the rest of the state.

  3. Western Canada SAGD drilling and completions performance

    Energy Technology Data Exchange (ETDEWEB)

    Turchin, S.; Tucker, R. [Ziff Energy Group (Canada)

    2011-07-01

    In the heavy oil industry, steam assisted gravity drainage (SAGD) is a thermal recovery method used to enhance oil recovery. In 2009, Ziff Energy carried out a study on SAGD drilling and completions performance in Western Canada. This paper presents the methodology used to assess drilling performances and the results obtained. This study was conducted on 159 SAGD well pairs and 1,833 delineation wells in the Western Canadian Sedimentary Basin from late 2004 to fall 2008. The drilling performance assessment was calculated from several aspects including well quality, drilling and completions cost performance and drilling time analysis. This study provided a detailed analysis of drilling and completions costs of SAGD which can help companies to improve their performance.

  4. Development Strategies for Achieving High Production with Fewer Wells in Conventional Offshore Heavy Oil Fields in Bohai Bay, China

    Institute of Scientific and Technical Information of China (English)

    Fu Xiang; Li Xiangfang; Kang Xiaodong

    2006-01-01

    Development strategy for heavy-oil reservoirs is one of the important research interests in China National Offshore Oil Corp. (CNOOC) that plans a highly effective development for heavy oil fields in multilayered fluvial reservoirs because of their significant influence on marine oil and even on China's petroleum production. The characteristics analysis of multilayered fluvial reservoirs in the heavy oil fields in Bohai Bay indicates that large amounts of oil were trapped in the channel, point bar and channel bar sands. The reserves distribution of 8 oilfields illustrates that the reserves trapped in the main sands, which is 20%-40% of all of the sand bodies, account for 70%-90% of total reserves of the heavy oil fields. The cumulative production from high productivity wells (50% of the total wells) was 75%-90% of the production of the overall oilfield, while only 3%-10% of the total production was from the low productivity wells (30% of the total wells). And the high productivity wells were drilled in the sands with high reserves abundance. Based on the above information the development strategy was proposed, which includes reserves production planning, selection of well configuration, productivity design, and development modification at different stages.

  5. Horizontal drilling activity in Manitoba

    Energy Technology Data Exchange (ETDEWEB)

    Fox, J.

    1997-04-01

    An update of horizontal well drilling in Manitoba was provided. Manitoba`s productive formations are: (1) the Bakken Formation, (2) the Lodgepole Formation, (3) the Mission Canyon Formation, (4) the Amaranth Formation, and (5) the Melita Formation. A total of 28 exploratory wells and 29 development wells, including 11 horizontal wells were drilled in 1996. The 11 horizontal wells accounted for 30 per cent of the drilling meterage. The leading drillers for horizontal wells in Manitoba are Tundra Oil and Gas, Chevron, Anderson and HCO. Production from horizontal wells in 1996 totaled 310 cubic meter per day. To date, no horizontal wells have been drilled in the Bakken Formation. The least successful horizontal well application has been in the Lodgepole Formation. A summary of horizontal well production was provided for each Formation. 4 tabs., 10 figs.

  6. Fiscal 1997 survey report. Survey on the innovative well drilling technology; 1997 nendo chosa hokokusho. Kakushinteki kosei kussaku gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In the geothermal drilling, reduction of the cost of well drilling is an important subject for technical development. The geothermal resource development tends to be made at higher temperatures and at deeper wells. In the present drilling technology, the cost is rising with the exponentially increasing depth and temperature, and there is also occurring the technical limit. Accordingly, the survey clarified the limit of the present drilling technology/cost to point out the research trend of the drilling technology as substitute for the present one, possibilities of the introduction, and the R and D target and subjects. As to latest drilling systems abroad and in Japan, the following were surveyed to study and extract promising technologies and systems: improvement/application of drilling equipment/materials (enhancement of heat resistance of the main drilling equipment, etc., cooling effects of top drive, heat resistance verification of MWD tools, PDM, tricone bits, multi-stage cementing tools, etc.), heightening of drilling rates, trend surveys of slim hole drilling, control drilling, well maintenance/workover, and well design technology. 68 refs., 73 figs., 40 tabs.

  7. Better well control through safe drilling margin identification, influx analysis and direct bottom hole pressure control method for deep water

    Energy Technology Data Exchange (ETDEWEB)

    Veeningen, Daan [National Oilwell Varco IntelliServ (NOV), Houston, TX (United States)

    2012-07-01

    Currently, well control events are almost exclusively detected by using surface measurements. Measuring a volume increase in the 'closed loop' mud circulation system; a standpipe pressure decrease; or changes in a variety of drilling parameters provide indicators of a kick. Especially in deep water, where the riser comprises a substantial section of the well bore, early kick detection is paramount for limiting the severity of a well bore influx and improve the ability to regain well control. While downhole data is presently available from downhole tools nearby the bit, available data rates are sparse as mud pulse telemetry bandwidth is limited and well bore measurements compete with transmission of other subsurface data. Further, data transfer is one-directional, latency is significant and conditions along the string are unknown. High-bandwidth downhole data transmission system, via a wired or networked drill string system, has the unique capability to acquire real-time pressure and temperature measurement at a number of locations along the drill string. This system provides high-resolution downhole data available at very high speed, eliminating latency and restrictions that typically limit the availability of downhole data. The paper describes well control opportunities for deep water operations through the use of downhole data independent from surface measurements. First, the networked drill string provides efficient ways to identify pore pressure, fracture gradient, and true mud weight that comprise the safe drilling margin. Second, the independent measurement capability provides early kick detection and improved ability to analyze an influx even with a heterogeneous mud column through distributed along-string annular pressure measurements. Third, a methodology is proposed for a direct measurement method using downhole real-time pressure for maintaining constant bottom hole pressure during well kills in deep water. (author)

  8. HETEROGENEOUS SHALLOW-SHELF CARBONATE BUILDUPS IN THE PARADOX BASIN, UTAH AND COLORADO: TARGETS FOR INCREASED OIL PRODUCTION AND RESERVES USING HORIZONTAL DRILLING TECHNIQUES

    Energy Technology Data Exchange (ETDEWEB)

    Thomas C. Chidsey, Jr.

    2002-12-01

    The Paradox Basin of Utah, Colorado, Arizona, and New Mexico contains nearly 100 small oil fields producing from carbonate buildups within the Pennsylvanian (Desmoinesian) Paradox Formation. These fields typically have one to 10 wells with primary production ranging from 700,000 to 2,000,000 barrels (111,300-318,000 m{sup 3}) of oil per field and a 15 to 20 percent recovery rate. At least 200 million barrels (31.8 million m{sup 3}) of oil will not be recovered from these small fields because of inefficient recovery practices and undrained heterogeneous reservoirs. Several fields in southeastern Utah and southwestern Colorado are being evaluated as candidates for horizontal drilling and enhanced oil recovery from existing, vertical, field wells based upon geological characterization and reservoir modeling case studies. Geological characterization on a local scale is focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible reservoir compartmentalization, within these fields. This study utilizes representative cores, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells. The results of these studies can be applied to similar fields elsewhere in the Paradox Basin and the Rocky Mountain region, the Michigan and Illinois Basins, and the Midcontinent region. This report covers research activities for the first half of the third project year (April 6 through October 5, 2002). This work included capillary pressure/mercury injection analysis, scanning electron microscopy, and pore casting on selected samples from Cherokee and Bug fields, Utah. The diagenetic fabrics and porosity types found at these fields are indicators of reservoir flow capacity, storage capacity, and potential for enhanced oil recovery via horizontal drilling. The reservoir quality of Cherokee and Bug fields has been affected by multiple generations of dissolution, anhydrite

  9. Reactivation of wells through reentries with a horizontal section in unconsolidated heavy oil sands

    Energy Technology Data Exchange (ETDEWEB)

    Bolanos, C.; Suarez, S.; Silvera, M. [LAGOVEN, Maturin (Venezuela)

    1995-12-31

    The current exploitation areas of heavy oil are located in southern Monagas and have an estimated STOOIP of 26.5 MMMBLs. The production mechanisms are bottom water drive and rock expansion. Cumulative production reaches 685 million barrels up to July 1994. In order to optimize the exploitation of the heavy and extra heavy oil remaining reserves by lowering the pressure drop between reservoir and the wellbore, reduce costs to increase the profits from these reservoirs, a program of horizontal redrill or {open_quotes}reentries,{close_quotes} as known widely, was started. This paper presents the experiences and results obtained after 41 horizontal reentries made in Jobo, Pilon, and Morichal Fields in the period April 1993 to July 1994. Up to July 1994 wells were active with an associated of 21.7 MBOPD with an average of 20% water cut, confirming the successful application of this technology in heavy oils and unconsolidated sands. Several points will be discussed such as reservoir characteristics, well design, horizontal length, productivity index, drilling, completion, water production, surface equipment, and production of horizontal wells compared with vertical wells.

  10. Study of the application of sunflower oil in the process of drilling ABNT 1045 steel

    Directory of Open Access Journals (Sweden)

    Jean Robert Pereira Rodrigues

    2014-04-01

    Full Text Available The cutting fluids in machining, when chosen and applied adequately can contemplate in benefits during the manufacturing processes. The selected method should allow the cutting fluid to reach the closest possible of the cutting edge lubricating the chip-tool interface. The properties of the fluid are fundamental so that the same facilitates the machining process. However the fluid can represent a great problem for the environment and health of the operator. For that reason, several scientific and technological studies are constantly developed to investigate the performance and alternative applications of cutting fluids in machining operations. This work studies the effect of sunflower oil in the cutting forces for the drilling process of 1045 ABNT steel. The fluid was applied in the form MQL - Minimum Quantity Lubrication for different cutting conditions. The cutting speed, feed rate and the length of the hole were varied. Each one of the cutting variables two levels were used. The results suggest a good acting sunflower oil in the work accomplished.

  11. Technology strategy for cost-effective drilling and intervention; Technology Target Areas; TTA4 - Cost effective drilling and intervention

    Energy Technology Data Exchange (ETDEWEB)

    2007-07-01

    The main goals of the OG21 initiative are to (1) develop new technology and knowledge to increase the value creation of Norwegian oil and gas resources and (2) enhance the export of Norwegian oil and gas technology. The OG21 Cost-effective Drilling and Intervention (CEDI) Technology Target Area (TTA) has identified some key strategic drilling and well intervention needs to help meet the goals of OG21. These key strategic drilling and well intervention needs are based on a review of present and anticipated future offshore-Norway drilling and well intervention conditions and the Norwegian drilling and well intervention industry. A gap analysis has been performed to assess the extent to which current drilling and well intervention research and development and other activities will meet the key strategic needs. Based on the identified strategic drilling and well intervention needs and the current industry res each and development and other activities, the most important technology areas for meeting the OG21 goals are: environment-friendly and low-cost exploration wells; low-cost methods for well intervention/sidetracks; faster and extended-reach drilling; deep water drilling, completion and intervention; offshore automated drilling; subsea and sub-ice drilling; drilling through basalt and tight carbonates; drilling and completion in salt formation. More specific goals for each area: reduce cost of exploration wells by 50%; reduce cost for well intervention/sidetracks by 50%; increase drilling efficiency by 40%; reduce drilling cost in deep water by 40 %; enable offshore automated drilling before 2012; enable automated drilling from seabed in 2020. Particular focus should be placed on developing new technology for low-cost exploration wells to stem the downward trends in the number of exploration wells drilled and the volume of discovered resources. The CEDI TTA has the following additional recommendations: The perceived gaps in addressing the key strategic drilling and

  12. Trends in hydraulic fracturing distributions and treatment fluids, additives, proppants, and water volumes applied to wells drilled in the United States from 1947 through 2010: data analysis and comparison to the literature

    Science.gov (United States)

    Gallegos, Tanya J.; Varela, Brian A.

    2015-01-01

    Hydraulic fracturing is presently the primary stimulation technique for oil and gas production in low-permeability, unconventional reservoirs. Comprehensive, published, and publicly available information regarding the extent, location, and character of hydraulic fracturing in the United States is scarce. This national spatial and temporal analysis of data on nearly 1 million hydraulically fractured wells and 1.8 million fracturing treatment records from 1947 through 2010 (aggregated in Data Series 868) is used to identify hydraulic fracturing trends in drilling methods and use of proppants, treatment fluids, additives, and water in the United States. These trends are compared to the literature in an effort to establish a common understanding of the differences in drilling methods, treatment fluids, and chemical additives and of how the newer technology has affected the water use volumes and areal distribution of hydraulic fracturing. Historically, Texas has had the highest number of records of hydraulic fracturing treatments and associated wells in the United States documented in the datasets described herein. Water-intensive horizontal/directional drilling has also increased from 6 percent of new hydraulically fractured wells drilled in the United States in 2000 to 42 percent of new wells drilled in 2010. Increases in horizontal drilling also coincided with the emergence of water-based “slick water” fracturing fluids. As such, the most current hydraulic fracturing materials and methods are notably different from those used in previous decades and have contributed to the development of previously inaccessible unconventional oil and gas production target areas, namely in shale and tight-sand reservoirs. Publicly available derivative datasets and locations developed from these analyses are described.

  13. 渤海油田低效井侧钻技术应用前景分析%Application Prospect of Sidetrack Drilling Technology for Inefficient Wells in Bohai Oilfield

    Institute of Scientific and Technical Information of China (English)

    王晓鹏; 韩耀图

    2015-01-01

    渤海油田目前低效井越来越多.新钻调整井或治理低效井面临着成本高、手段单一等难题.针对此问题,通过分析渤海油田稳产现状、剩余油分布规律,提出了低效井侧钻的必要性.根据渤海油田钻完井技术水平,提出了利用平台现有修井机进行低效井侧钻中短半径井眼的低成本侧钻思路,分析了钻完井方案可行性,评估了修井机作业能力.研究结果显示,渤海常规的φ152.4mm钻头+动力钻具+随钻测井工具(LWD+MWD)+非磁钻铤+震击器+钻杆的钻具组合可实现10°/30m以下的造斜率要求.优化的侧钻小井眼的井身结构和完井防砂技术方案适用于渤海油田的侧钻井作业.目前海洋修井机从提升能力、最大扭矩、水力清洁等方面均能满足侧钻井要求,海上平台现有修井机进行低效井中短半径井眼的侧钻作业在渤海油田具有可行性.结合具体实例进行了低效井侧钻技术应用经济效益评估,侧钻中短半径井眼技术及优化管理措施可大幅度降低钻井成本,提高经济效益.%There are more and more low-production wells in Bohai Oilfield. At present, drilling adjustment wells or admin-istering inefficient wells are faced with such problems as high cost and less means. For this, we analyzed production status and residual oil distribution of the Oilfield, and found it necessary to use sidetrack drilling technology for inefficient well drilling. According to the drilling and completion technology, we proposed to use workover rig for sidetracking of middle-short radius wells, analyzed the feasibility of drilling and completion programs, and evaluated the marine workover rig ca-pacity. It was shown that the conventional drilling assembly of φ152.4mm drill bit+motor+logging while drilling tool ( LWD+MWD) +non-magnetic drill collar+jar+drill pipe could achieve the build-up rate below 10°/30m. The optimized well-bore configuration of sidetracking slim hole and

  14. Contracts for field projects and supporting research on enhanced oil recovery and improved drilling technology. Progress review No. 34, quarter ending March 31, 1983

    Energy Technology Data Exchange (ETDEWEB)

    Linville, B. (ed.)

    1983-07-01

    Progress achieved for the quarter ending March 1983 are presented for field projects and supporting research for the following: chemical flooding; carbon dioxide injection; and thermal/heavy oil. In addition, progress reports are presented for: resource assessment technology; extraction technology; environmental and safety; microbial enhanced oil recovery; oil recovered by gravity mining; improved drilling technology; and general supporting research. (ATT)

  15. Deep Drilling Into the Chicxulub Impact Crater: Pemex Oil Exploration Boreholes Revisited

    Science.gov (United States)

    Fucugauchi, J. U.; Perez-Cruz, L.

    2007-05-01

    The Chicxulub structure was recognized in the 1940´s from gravity anomalies in oil exploration surveys by Pemex. Geophysical anomalies occur over the carbonate platform in NW Yucatan, where density and magnetic susceptibility contrasts with the carbonates suggested a buried igneous complex or basement uplift. The exploration program developed afterwards included several boreholes, starting with the Chicxulub-1 in 1952 and eventually comprising eight deep boreholes completed through the 1970s. The investigations showing Chicxulub as a large impact crater formed at the K/T boundary have relayed on the Pemex decades-long exploration program. Despite frequent reference to Pemex information, original data have not been openly available for detailed evaluation and incorporation with results from recent efforts. Logging data and core samples remain to be analyzed, reevaluated and integrated in the context of recent marine, aerial and terrestrial geophysical surveys and the drilling/coring projects of UNAM and ICDP. In this presentation we discuss the paleontological data, stratigraphic columns and geophysical logs for the Chicxulub-1 (1582m), Sacapuc-1 (1530m), Yucatan-6 (1631m) and Ticul-1 (3575m) boreholes. These boreholes remain the deepest ones drilled in Chicxulub and the only ones providing samples of the melt-rich breccias and melt sheet. Other boreholes include the Y1 (3221m), Y2 (3474m), Y4 (2398m) and Y5A (3003m), which give information on pre-impact stratigraphy and crystalline basement. We concentrate on log and microfossil data, stratigraphic columns, lateral correlation, integration with UNAM and ICDP borehole data, and analyses of sections of melt, impact breccias and basal Paleocene carbonates. Current plans for deep drilling in Chicxulub crater focus in the peak ring zone and central sector, with proposed marine and on-land boreholes to the IODP and ICDP programs. Future ICDP borehole will be located close to Chicxulub-1 and Sacapuc-1, which intersected

  16. Modeling and optimization for oil well production scheduling☆

    Institute of Scientific and Technical Information of China (English)

    Jin Lang; Jiao Zhao

    2016-01-01

    In this paper, an oil wel production scheduling problem for the light load oil wel during petroleum field exploi-tation was studied. The oil well production scheduling was to determine the turn on/off status and oil flow rates of the wel s in a given oil reservoir, subject to a number of constraints such as minimum up/down time limits and well grouping. The problem was formulated as a mixed integer nonlinear programming model that minimized the total production operating cost and start-up cost. Due to the NP-hardness of the problem, an improved par-ticle swarm optimization (PSO) algorithm with a new velocity updating formula was developed to solve the problem approximately. Computational experiments on randomly generated instances were carried out to eval-uate the performance of the model and the algorithm's effectiveness. Compared with the commercial solver CPLEX, the improved PSO can obtain high-quality schedules within a much shorter running time for all the instances.

  17. Hydraulic analysis of the operation of oil and gas wells

    Energy Technology Data Exchange (ETDEWEB)

    Gabor, T.; Szaharov, V.A.; Szilas, A.P.

    1984-01-01

    The results are cited of a study of the operation of operational oil and gas wells. A hydraulic system of operational wells is identified for the first time, which consists of elements of a stratum, well and surface equipment system. After a brief presentation of the rating methods which describe the operation of the elements, the methods for hydraulic analysis of the complete system are detailed. After theoretical presentation of the methods, the course of computer (EVM) programs, developed for practical purposes, is shown. These programs may be used to solve two basic problems in gusher extraction of oil: identification of the maximal flow rate of a gusher well and the operational point of a well which has a wellhead coupling.

  18. Reliability-Growth of Triplex Drilling Pump

    Institute of Scientific and Technical Information of China (English)

    Hou Yu; ZhaoZhong

    1996-01-01

    @@ Introduction to triplex pump The triplex pump widely used in oilfields is composed of power end assembly, fluid end assembly, piston-liner spraying system, lubrication system and charging system.The pump delivers mud into oil well. Through nozzles of drilling bit, the mud inside the drilling shaft comes to the annular space between drilling shaft and casing string and then returns to surface.

  19. Laboratory development and field application of novel cement system for cementing high-temperature oil wells

    Energy Technology Data Exchange (ETDEWEB)

    Wan, X.; Zhang, H.; Li, Y.; Yang, Y. [SINOPEC, Beijing (China); Shan, H.; Xiao, Z. [OPT, Beijing (China)

    2010-07-01

    The challenges that oil and gas well engineers face when cementing mid-to-high temperature exploration oil and gas wells were discussed. A newly developed cement system with an effective laminar-flow spacer was presented along with case histories that document the system's effectiveness for cementing high temperature exploration wells. The problems associated with cementing high temperature exploration wells include high bottom hole static temperature; very low pump rates; and very long job times. These challenges contribute to the operational risks during cement slurry placement in the wellbore as well as during cement sheath setting during the life of the well. The new cement formulation presented in this paper addresses these challenges. Eight jobs have been completed in the field with much success. The combination of a new retarder and fluid loss control additive improves the system performance considerably in terms of low fluid loss rate, minimal free water, proper rheology, predictable thickening time, high resistance to salt contaminations and no adverse effect on set cement strength. The drilling muds are effectively displaced by the laminar flow spacer, thus improving the cementing bond. 9 refs., 5 tabs., 6 figs.

  20. Steam Flooding after Steam Soak in Heavy Oil Reservoirs through Extended-reach Horizontal Wells

    Institute of Scientific and Technical Information of China (English)

    Ning Zhengfu; Liu Huiqing; Zhang Hongling

    2007-01-01

    This paper presents a new development scheme of simultaneous injection and production in a single horizontal well drilled for developing small block reservoirs or offshore reservoirs.It is possible to set special packers within the long completion horizontal interval to establish an injection zone and a production zone.This method can also be used in steam flooding after steam soak through a horizontal well.Simulation results showed that it was desirable to start steam flooding after six steam soaking cycles and at this time the oil/steam ratio was 0.25 and oil recovery efficiency was 23.48%.Steam flooding performance was affected by separation interval and steam injection rate.Reservoir numerical simulation indicated that maximum oil recovery would be achieved at a separation section of 40-50 m at steam injection rate of 100-180 t/d; and the larger the steam injection rate,the greater the water cut and pressure difference between injection zone and production zone.A steam injection rate of 120 t/d was suitable for steam flooding under practical injection-production conditions.All the results could be useful for the guidance of steam flooding projects.

  1. Monte Carlo Simulations of Neutron Oil well Logging Tools

    CERN Document Server

    Azcurra, M

    2002-01-01

    Monte Carlo simulations of simple neutron oil well logging tools into typical geological formations are presented.The simulated tools consist of both 14 MeV pulsed and continuous Am-Be neutron sources with time gated and continuous gamma ray detectors respectively.The geological formation consists of pure limestone with 15% absolute porosity in a wide range of oil saturation.The particle transport was performed with the Monte Carlo N-Particle Transport Code System, MCNP-4B.Several gamma ray spectra were obtained at the detector position that allow to perform composition analysis of the formation.In particular, the ratio C/O was analyzed as an indicator of oil saturation.Further calculations are proposed to simulate actual detector responses in order to contribute to understand the relation between the detector response with the formation composition

  2. Interpretation of core and well log physical property data from drill hole UPH-3, Stephenson County, Illinois

    Science.gov (United States)

    Daniels, Jeffrey J.; Olhoeft, Gary R.; Scott, James H.

    1983-09-01

    Laboratory and well log physical property measurements show variations in the mineralogy with depth in UPH-3. Gamma ray values generally decrease with depth in the drill hole, corresponding to a decrease in the felsic mineral components of the granite. Correspondingly, an increase with depth in mafic minerals in the granite is indicated by the magnetic susceptibility and gamma ray measurements. These mineralogic changes indicated by the geophysical well logs support the hypothesis of fractionation during continuous crystalization of the intrusive penetrated by UPH-3. Two fracture zones and an altered zone within the granite penetrated by drill hole UPH-3 are defined by the physical property measurements. An abnormally low magnetic susceptibility response in the upper portion of the drill hole can be attributed to alteration of the rock adjacent to the sediments overlying the granite. Fracture zones can be identified from the sonic velocity, neutron, and resistivity measurements. A fracture zone, characterized by low resistivity values and low neutron values, is present in the depth interval from 1150 to 1320 m. Low magnetic susceptibility and high gamma ray values indicate the presence of felsic-micaceous pegmatites within this fracture zone. An unfractured region present from a depth of 1380 m to the bottom of the hole is characterized by an absence of physical property variations. The magnetic susceptibility and gamma ray measurements indicate a change in the amount of mafic minerals at the base of this otherwise homogenous region of the drilled interval. Abrupt changes and repeated patterns of physical properties within the drill hole may represent interruptions in the crystalization process of the melt or they may be indicative of critical temperatures for specific mineral assemblages within the intrusive.

  3. Avoidance of unconventional oil wells and roads exacerbates habitat loss for grassland birds in the North American great plains

    Science.gov (United States)

    Thompson, Sarah J.; Johnson, Douglas H.; Nieumuth, Neal; Ribic, Christine

    2015-01-01

    Oil development in the Bakken shale region has increased rapidly as a result of new technologies and strong demand for fossil fuel. This region also supports a particularly high density and diversity of grassland bird species, which are declining across North America. We examined grassland bird response to unconventional oil extraction sites (i.e. developed with hydraulic fracturing and horizontal drilling techniques) and associated roads in North Dakota. Our goal was to quantify the amount of habitat that was indirectly degraded by oil development, as evidenced by patterns of avoidance by birds. Grassland birds avoided areas within 150 m of roads (95% CI: 87–214 m), 267 m of single-bore well pads (95% CI: 157–378 m), and 150 m of multi-bore well pads (95% CI: 67–233 m). Individual species demonstrated variable tolerance of well pads. Clay-colored sparrows (Spizella pallida) were tolerant of oil-related infrastructure, whereas Sprague's pipit (Anthus spragueii) avoided areas within 350 m (95% CI: 215–485 m) of single-bore well pads. Given these density patterns around oil wells, the potential footprint of any individual oil well, and oil development across the region, is greatly multiplied for sensitive species. Efforts to reduce new road construction, concentrate wells along developed corridors, combine numerous wells on multi-bore pads rather than build many single-bore wells, and to place well pads near existing roads will serve to minimize loss of suitable habitat for birds. Quantifying environmental degradation caused by oil development is a critical step in understanding how to better mitigate harm to wildlife populations.

  4. Regulation of Water Pollution from Hydraulic Fracturing in Horizontally-Drilled Wells in the Marcellus Shale Region, USA

    Directory of Open Access Journals (Sweden)

    Heather Hatzenbuhler

    2012-12-01

    Full Text Available Hydraulic fracturing is an industrial process used to extract fossil fuel reserves that lie deep underground. With the introduction of horizontal drilling, new commercial sources of energy have become available. Wells are drilled and injected with large quantities of water mixed with specially selected chemicals at high pressures that allow petroleum reserves to flow to the surface. While the increased economic activities and the outputs of domestic energy are welcomed, there is growing concern over negative environmental impacts from horizontal drilling in shale formations. The potential for water contamination, land destruction, air pollution, and geologic disruption has raised concerns about the merits of production activities used during extraction. This paper looks at the impacts of horizontal drilling using hydraulic fracturing on water supplies and takes a comprehensive look at legislative and regulatory approaches to mitigate environmental risks in the Marcellus shale region. The overview identifies shortcomings associated with regulatory controls by local and state governments and offers two policy suggestions to better protect waters of the region.

  5. Decision 99-26, application 1027549 - Startech Energy Inc., application to drill a noncritical level-1 sour gas well Turner Valley Field,

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-07-01

    Startech Energy Inc. (Startech) applied to the Alberta Energy and Utilities Board (EUB), pursuant to Section 2.020 of the Alberta Oil and Gas Conservation Regulations for a licence to drill a level-1 noncritical sour gas well from a surface location of Legal Subdivision 13, Section 32, Township 21, Range 3, West of the 5th Meridian. The purpose of the well would be to produce sour gas from the Turner Valley Formation from a bottomhole location of Legal Subdivision 7, Section 5, Township 22, Range 3, West of the 5th Meridian. The Board received several objections to the application from area residents near the proposed well; the intervenors group was known as the Whisky Hills Owners Alliance. The issues considered were: need for the well, proposed well access and access road locations, impacts of the proposed well and access road, safety of the well, including potential hydrogen sulfide release rates, drilling, completion and production considerations, public safety risk assessment, and emergency response planning and preparedness, public notification and consultation, and other matters. Having considered all of the evidence, the Board determined that approval of Application No. 1027549 was in the public interest, because it met all of the Board's regulatory requirements. The Board was satisfied that Startech was committed to take appropriate measures to ensure that public safety risks and impacts would be minimized. Also the Board determined that the public safety risks and impacts associated with the proposed well were representative of normal industrial risks and impacts accepted by society. Conditions are listed.

  6. Role of environmental pollutants in liver physiology: special references to peoples living in the oil drilling sites of Assam.

    Directory of Open Access Journals (Sweden)

    Tapan Dey

    Full Text Available The populations residing near polluted sites are more prone to various types of diseases. The important causes of air pollution are the suspended particulate matter, respirable suspended particulate matter, sulfur dioxide and nitrogen dioxide. As limited information is available enumerating the effect of these pollutants on liver physiology of the population living near the polluted sites; in the present study, we tried to investigate their effect on liver of the population residing near the oil drilling sites since birth. In this study, a randomly selected 105 subjects (46 subjects from oil drilling site and 61 subjects from control site aged above 30 years were taken under consideration. The particulate matter as well as the gaseous pollutants, sulfur dioxide and nitrogen dioxide, were analyzed through a respirable dust sampler. The level of alkaline phosphatase, alanine transaminase and aspartate transaminase enzymes in serum were measured by spectrophotometer. The generalized regression model studies suggests a higher concentration of respirable suspended particulate matter, suspended particulate matter and nitrogen dioxide lowers the alkaline phosphatase level (p<0.0001 by 3.5 times (95% CI 3.1-3.9, 1.5 times (95% CI 1.4-1.6 and 12 times (95% CI 10.74-13.804, respectively in the exposed group. The higher concentration of respirable suspended particulate matter and nitrogen dioxide in air was associated with increase in alanine transaminase level (p<0.0001 by 0.8 times (95% CI 0.589-1.049 and by 2.8 times (95% CI 2.067-3.681 respectively in the exposed group. The increase in nitrogen dioxide level was also associated with increase in aspartate transaminase level (p<0.0001 by 2.5 times (95% CI 1.862-3.313 in the exposed group as compared to control group. Thus, the study reveals that long-term exposure to the environmental pollutants may lead to liver abnormality or injury of populations living in polluted sites.

  7. Research on forced gas draining from coal seams by surface well drilling

    Institute of Scientific and Technical Information of China (English)

    Wu Dongmei; Wang Haifeng; Ge Chungui; An Fenghua

    2011-01-01

    Surface drilling was performed at the Luling Coal Mine, in Huaibei, to shorten the period required for gas draining. The experimental study was designed to reduce the cost of gas control by efficiently draining gas from the upper protected layer. The structural arraignment and technical principles of pressure relief via surface drilling are discussed. Results from the trial showed that gas drained from the surface system over a period of 10 months. The total amount of collected gas was 248.4 million m3. The gas draining occurred in three stages: a growth period; a period of maximum gas production; and an attenuation period. The period of maximum gas production lasted for 4 months. During this time the methane concentration ranged from 60% to 90% and the average draining rate was 10.6 m3/min. Combined with other methods of draining it was possible to drain 70.6% of the gas from middle coal seam groups. The amount of residual gas dropped to 5.2 m3/ton, and the pressure of the residual gas fell to 0.53 MPa,thereby eliminating the outburst danger in the middle coal seam groups. The factors affecting pressure relief gas draining by surface drilling were analysed.

  8. Esterification Reaction of Glycerol and Palm Oil Oleic Acid Using Methyl Ester Sulfonate Acid Catalyst as Drilling Fluid Formulation

    Science.gov (United States)

    Sari, V. I.; Hambali, E.; Suryani, A.; Permadi, P.

    2017-02-01

    Esterification reaction between glycerol with palm oil oleic acid to produce glycerol ester and one of the utilization of glycerol esters is as ingredients of drilling fluids formula for oil drilling needs. The purpose of this research is to get the best conditions of the esterification process. The esterification reaction does with the reactants is glycerol with purity of 97.6%, palm oil oleic acid with the molar ratio is 1:1, Methyl Ester Sulfonate Acid (MESA) catalyst 0.5%, and stirring speed 400 rpm. The temperature range of 180°C to 240°C and the processing time between 120 to 180 minutes. The results showed that the best conditions of the esterification reaction at the temperature 240°C and time process are 180 minute. The increasing temperature resulted that the acid number decreases and causing the conversion increased. The maximum conversion is 99.24%, density 0.93 g/cm3, flash point 241°C, pour point -3°C, the boiling point of 244 °C, the acid value of 1.90 mg KOH/g sample, kinematic viscosity 31.51 cSt (40°C), surface tension 37.0526 dyne/cm and GCMS identification, glycerol ester at 22,256 retention time (minutes) and wide area 73.75 (%). From the research results obtained glycerol ester with characteristics suitable for drilling fluid formulations.

  9. Variability of oil and gas well productivities for continuous (unconventional) petroleum accumulations

    Science.gov (United States)

    Charpentier, Ronald R.; Cook, Troy A.

    2013-01-01

    Over the last decade, oil and gas well productivities were estimated using decline-curve analysis for thousands of wells as part of U.S. Geological Survey (USGS) studies of continuous (unconventional) oil and gas resources in the United States. The estimated ultimate recoveries (EURs) of these wells show great variability that was analyzed at three scales: within an assessment unit (AU), among AUs of similar reservoir type, and among groups of AUs with different reservoir types. Within a particular oil or gas AU (such as the Barnett Shale), EURs vary by about two orders of magnitude between the most productive wells and the least productive ones (excluding those that are dry and abandoned). The distributions of EURs are highly skewed, with most of the wells in the lower part of the range. Continuous AUs were divided into four categories based on reservoir type and major commodity (oil or gas): coalbed gas, shale gas, other low-permeability gas AUs (such as tight sands), and low-permeability oil AUs. Within each of these categories, there is great variability from AU to AU, as shown by plots of multiple EUR distributions. Comparing the means of each distribution within a category shows that the means themselves have a skewed distribution, with a range of approximately one to two orders of magnitude. A comparison of the three gas categories (coalbed gas, shale gas, and other low-permeability gas AUs) shows large overlap in the ranges of EUR distributions. Generally, coalbed gas AUs have lower EUR distributions, shale gas AUs have intermediate sizes, and the other low-permeability gas AUs have higher EUR distributions. The plot of EUR distributions for each category shows the range of variation among developed AUs in an appropriate context for viewing the historical development within a particular AU. The Barnett Shale is used as an example to demonstrate that dividing wells into groups by time allows one to see the changes in EUR distribution. Subdivision into groups

  10. Mathematical Model and Simulation of a Pneumatic Apparatus for In-Drilling Alignment of an Inertial Navigation Unit during Horizontal Well Drilling

    OpenAIRE

    Djurkov, Alexander; Cloutier, Justin; Mintchev, Martin P.

    2008-01-01

    Conventional methods in horizontal drilling processes incorporate magnetic surveying techniques for determining the position and orientation of the bottom-hole assembly (BHA). Such means result in an increased weight of the drilling assembly, higher cost due to the use of non-magnetic collars necessary for the shielding of the magnetometers, and significant errors in the position of the drilling bit. A fiber-optic gyroscope (FOG) based inertial navigation system (INS) has been pro...

  11. Use of the method of Boolean models to study different methods of drilling wells of large diameter

    Energy Technology Data Exchange (ETDEWEB)

    Selivanov, A.N.; Ryabinin, A.I.

    1981-01-01

    A description is made of the method of statistical modeling using the method of Boolean models as an example of processing and analyzing the results of drilling wells of large diameter by different methods. It is indicated that this method as compared to traditional methods of multiple-factor analysis with comparatively small volume of experimental data makes it possible to obtain a complete qualitative and quantitative characterization of the studied phenomenon.

  12. Application of rapid drilling technique of"one trip drilling" in Lukeqin heavy oil reservoir%“一趟钻”快速钻井技术在鲁克沁稠油油藏中的应用

    Institute of Scientific and Technical Information of China (English)

    钱峰; 肖华

    2012-01-01

    Lukeqin heavy oil reservoir is in great depth and developed with salt rocks, so the requirement for wellbore quality is high. Frequent tripping is the feature of the preexisting drilling process, and the drilling efficiency is low. Base on surveying a number of past field operations, the drilling history data is analyzed, and the matching speed raising technique is studied. The high efficient PDC bit and high efficiency BHA are designed and optimized, and the high quality matching drilling fluid is taken, to carry out the objective of two sections of drilling operations in one trip. The rapid drilling technique of one trip drilling improved greatly the drilling rate of Lukeqin heavy oil reservoir, and decreased the drilling cost. It effectively protected the reservoir, and played a great role in increasing oil reserve and production.%鲁克沁稠油油藏油层深、盐膏层发育,对井身质量要求高,原有的钻井工艺起下钻频繁,钻井时效低.在调研前期大量现场施工的基础上,分析了钻井井史资料,研究了提速配套技术,通过改变提速技术方案,设计优选了高效PDC钻头、高效井下动力钻具及采用优质配套的钻井液等措施,最终实现了二开“一趟钻”的目标.“一趟钻”快速钻井技术大幅度提高了鲁克沁稠油油藏的钻井速度,降低了钻井成本,有效地保护了油气层,为油田增储上产起到了较大的推动作用.

  13. COMPETITION FOR SPACE BETWEEN FISHING AND EXPLORATORY OIL DRILLING, OBSERVED FROM A DRILLING PLATFORM IN THE ESPIRITO SANTO BASIN, SOUTHEASTERN BRAZIL

    Directory of Open Access Journals (Sweden)

    Alessandra Coutinho Thomé da Silva

    2015-03-01

    Full Text Available Fishing and oil drilling compete for space in some regions off the Brazilian coast. Fish congregate around drilling platforms, which attracts fishing vessels that may illegally breach the 500 m safety perimeter. The objective of this study was to identify the fleets that frequent the safety zone of a platform and their behavior and to determine if there was a seasonal relationship in this interaction, during two exploration campaigns, in different periods, carried out on the "Ocean Star" platform in the Espírito Santo Basin. The results indicated a high incidence of artisanal fishing vessels inside the prohibited area, and of uncooperative behavior on the part of the boat crews. The statistical method of Factorial Correspondence Analysis distinguished vessels that were using pelagic longlines to fish for dolphinfish, registered in the state of Espírito Santo and longer than 11 m, which operated during the summer campaign. Vessels fishing for scombrids, which were less than 11 m long and registered outside Espírito Santo, were prominent in the autumn-winter campaign. In conclusion, the data showed that the fleets involved in each exploratory campaign were different, but to determine the real reason why the boats insist on frequenting the area close to the platform further study is necessary.

  14. HIGH-POWER TURBODRILL AND DRILL BIT FOR DRILLING WITH COILED TUBING

    Energy Technology Data Exchange (ETDEWEB)

    Robert Radtke; David Glowka; Man Mohan Rai; David Conroy; Tim Beaton; Rocky Seale; Joseph Hanna; Smith Neyrfor; Homer Robertson

    2008-03-31

    Commercial introduction of Microhole Technology to the gas and oil drilling industry requires an effective downhole drive mechanism which operates efficiently at relatively high RPM and low bit weight for delivering efficient power to the special high RPM drill bit for ensuring both high penetration rate and long bit life. This project entails developing and testing a more efficient 2-7/8 in. diameter Turbodrill and a novel 4-1/8 in. diameter drill bit for drilling with coiled tubing. The high-power Turbodrill were developed to deliver efficient power, and the more durable drill bit employed high-temperature cutters that can more effectively drill hard and abrasive rock. This project teams Schlumberger Smith Neyrfor and Smith Bits, and NASA AMES Research Center with Technology International, Inc (TII), to deliver a downhole, hydraulically-driven power unit, matched with a custom drill bit designed to drill 4-1/8 in. boreholes with a purpose-built coiled tubing rig. The U.S. Department of Energy National Energy Technology Laboratory has funded Technology International Inc. Houston, Texas to develop a higher power Turbodrill and drill bit for use in drilling with a coiled tubing unit. This project entails developing and testing an effective downhole drive mechanism and a novel drill bit for drilling 'microholes' with coiled tubing. The new higher power Turbodrill is shorter, delivers power more efficiently, operates at relatively high revolutions per minute, and requires low weight on bit. The more durable thermally stable diamond drill bit employs high-temperature TSP (thermally stable) diamond cutters that can more effectively drill hard and abrasive rock. Expectations are that widespread adoption of microhole technology could spawn a wave of 'infill development' drilling of wells spaced between existing wells, which could tap potentially billions of barrels of bypassed oil at shallow depths in mature producing areas. At the same time, microhole

  15. Image Reconstruction for Invasive ERT in Vertical Oil Well Logging

    Institute of Scientific and Technical Information of China (English)

    周海力; 徐立军; 曹章; 胡金海; 刘兴斌

    2012-01-01

    An invasive electrical resistance tomographic sensor was proposed for production logging in vertical oil well.The sensor consists of 24 electrodes that are fixed to the logging tool,which can move in the pipeline to acquire data on the conductivity distribution of oil/water mixture flow at different depths.A sensitivity-based algorithm was introduced to reconstruct the cross-sectional images.Analysis on the sensitivity of the sensor to the distribution of oil/water mixture flow was carried out to optimize the position of the imaging cross-section.The imaging results obtained using various boundary conditions at the pipe wall and the logging tool were compared.Eight typical models with various conductivity distributions were created and the measurement data were obtained by solving the forward problem of the sensor system.Image reconstruction was then implemented by using the simulation data for each model.Comparisons between the models and the reconstructed images show that the number and spatial distribution of the oil bubbles can be clearly identified.

  16. Research and Industrial Application of Drilling Technology of Ultra-deep Wells%超深井钻井技术研究及工业化应用

    Institute of Scientific and Technical Information of China (English)

    张金成; 牛新明; 张进双

    2015-01-01

    陆上油气勘探开发正向着超深层领域发展,中国石化钻遇的超深井普遍存在着压力系统复杂、地层岩性复杂、储层流体复杂、工程力学复杂等工程地质特征。钻井工程面临着设计优化难、施工风险大、钻井速度慢、工程质量控制难度大等技术问题。在钻井施工中表现为钻井周期长、复杂情况和故障多、工程投资大,甚至有些井难以钻达目的层。2005年以来,中国石化石油工程技术研究院联合石油高校、油田企业组成“产—学—研”攻关团队,以川东北、塔里木盆地超深层油气勘探开发为依托,紧密围绕“优质、安全、高效”攻关目标,强化室内模拟和理论分析,加强以新型工具和新材料为载体的技术攻关,强化技术集成应用,研究形成了多信息综合反演钻井地质环境因素精细描述技术、基于钻井工程风险评价的井身结构优化设计方法、大尺寸井眼气体钻井及流体安全转换技术、高效破岩工具及配套技术、基于常规导向的超深水平井井眼轨迹控制技术、超高温及超高密度钻井液技术、高酸性气田胶乳防气窜水泥浆固井技术等7项技术创新成果,并开展了现场试验及工业化应用,形成了超深井钻井配套技术,使我国超深井钻井技术跨入了世界先进行列。%Offshore oil and gas exploration is advancing to the ultra-deep structure field.For Sinopec, it is very common to encounter the complicated geological characteristics of complex pressure system, ancient sedimentary, HTHP, fluid toxicity and difficulties in engineering mechanics.In terms of drilling engineering, the technical problems exist in design optimiza-tion, high construction risk, slow drilling speed and quality control.In well drilling construction, long drilling period, com-plex circumstances, multiple faults, large investment and even being difficult to reach the target layer

  17. Clear well physical water treatment technology for the oil field

    Energy Technology Data Exchange (ETDEWEB)

    Troncoso y Troncoso, Joao Ricardo [Weatherford Brazil, Rio de Janeiro, RJ (Brazil); Rzeznik, Lawrence; Parker, Wiley L. [Weatherford International, Houston, TX (United States)

    2008-07-01

    Deposits of various types are common problems associated with oil and gas production. Deposits of scale, paraffin can block tubing, cause pumps to stick and clog valves and chokes. The expense and widespread occurrence of deposition problems have resulted in the development of a variety of treatment options which have been marginally successful at best. This paper discusses a new and novel approach for controlling scale, paraffin using an electronic physical water treating device and results that have been achieved. This physical water treatment technology has been applied to oil and gas production wells which incorporate all forms of product lift. Units are now also being installed in several South American locations. This paper will discuss the results obtained from the use of these physical water treatment devices and discuss the criteria which are used to ascertain whether a particular well site's problems can be eased by use of these devices. These criteria will be discussed for both land based and offshore oil wells. (author)

  18. Full-Scale Deep Well Drilling Simulation%全尺寸深井钻井模拟装置对钻井技术发展的影响

    Institute of Scientific and Technical Information of China (English)

    西德尼·格林

    2011-01-01

    缩短钻井周期是降低深井钻井成本和钻井风险的关键,这需要钻井新技术、新工艺、新材料、新工具的研究与应用,这必然要很大程度上依赖于大量的室内试验.斯伦贝谢Terra Tek钻完井实验室有全球最先进的全尺寸钻井模拟试验装置,在30多年间做了大量的模拟试验,试验结果对钻井技术发展、钻头设计、钻井液体系优选及性能优化起到了积极的促进作用.在介绍Terra Tek全尺寸钻井模拟试验装置的组成及主要功能的基础上,分析了该实验室在美国岩石力学协会钻井论坛、冲击钻井及深井钻井模拟试验中取得的主要成果,并介绍了该实验室在页岩气地层特点、开发技术和井眼稳定等方面取得的研究进展.%Deep-well drilling is essential for oil and gas recovery, and in many ways drives the advancement in energy recovery for unconventional and difficult reservoirs. Furthermore,as the world moves more toward unconventional oil and to gas,more and more reliance is placed on drilling. This is particularly true for gas,as more length of drilled hole-much greater lengths of drilled hole-will be required for the same amount of BTU's recovered. Drilling is often the key to economic success and risk reduction. Advancements are being made in drill bits,in drilling muds,and drilling techniques. Unfortunately we cannot "see"the drilling operation at great depths,and must rely on experimentation trial-and-error to a large extent.The field drilling is to some extent a "free" laboratory,and indeed advancements are being made via this field laboratory and trial-an-error experimentation. Unfortunately, there are limitations with this approach,and the introduction of new innovations tends to be slow and limited. However,the Schlumberger TerraTek Drilling and Completions Laboratory offers an opportunity for quantitative measurements that greatly add to the field laboratory observations. The TerraTek Drilling and

  19. Drilling down natural gas well permitting policy: Examining the effects of institutional arrangements on citizen participation and policy outcomes

    Science.gov (United States)

    Long, Laurie C.

    Over the past decade the movement of natural gas drilling operations toward more suburban and urban communities has created unique policy challenges for municipalities. Municipal response is manifest in a variety of institutional arrangements, some more enabling than others regarding citizen access to public hearings. This observation lead to the main research question, "How are variations in citizen participation affecting policy outcomes?" The argument is made that institutions affecting citizen participation, in turn affect policy outcomes. If the general public is given access to public hearings, their preferences for longer setbacks will be taken into account and the approved gas wells will have greater distances from neighboring residences -- effectively providing for greater safety. Given the paucity of research on the topic of natural gas drilling, the research first begins with the presentation of a theoretical framework to allow for analysis of the highly complex topic of gas well permitting, emphasizing the rule-ordered relationships between the various levels of decision making and provides a typology of collective action arenas currently used by Texas municipalities. The research uses paired case studies of most similar design and employs a mixed methods process for the collection, analysis and interpretation of the municipal level gas well permitting process. The investigation includes a complete census of 185 approved gas wells from four North Texas cities between the years 2002-2012; 20 interviews comprised of city officials and drilling operators; and archival records such as gas well site plans, ordinances, online government documents and other public information. The findings reveal that zoning institutions are associated with a 15% longer gas well setback than siting institutions and institutions without waivers are associated with a 20% longer gas well setback than institutions with waiver rules. The practical implications suggest that citizen

  20. Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Thomas C. Chidsey; Kevin McClure; Craig D. Morgan

    2003-10-05

    The Paradox Basin of Utah, Colorado, Arizona, and New Mexico contains nearly 100 small oil fields producing from carbonate buildups within the Pennsylvanian (Desmoinesian) Paradox Formation. These fields typically have one to 10 wells with primary production ranging from 700,000 to 2,000,000 barrels (111,300-318,000 m{sup 3}) of oil per field and a 15 to 20 percent recovery rate. At least 200 million barrels (31.8 million m{sup 3}) of oil will not be recovered from these small fields because of inefficient recovery practices and undrained heterogeneous reservoirs. Several fields in southeastern Utah and southwestern Colorado are being evaluated as candidates for horizontal drilling and enhanced oil recovery from existing vertical wells based upon geological characterization and reservoir modeling case studies. Geological characterization on a local scale is focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible reservoir compartmentalization, within these fields. This study utilizes representative cores, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells. The results of these studies can be applied to similar fields elsewhere in the Paradox Basin and the Rocky Mountain region, the Michigan and Illinois Basins, and the Midcontinent region. This report covers research activities for the first half of the fourth project year (April 6 through October 5, 2003). The work included (1) analysis of well-test data and oil production from Cherokee and Bug fields, San Juan County, Utah, and (2) diagenetic evaluation of stable isotopes from the upper Ismay and lower Desert Creek zones of the Paradox Formation in the Blanding sub-basin, Utah. Production ''sweet spots'' and potential horizontal drilling candidates were identified for Cherokee and Bug fields. In Cherokee field, the most productive wells are located in the

  1. Key drilling technology for marine deepwater relief wells%海洋深水救援井钻井关键技术

    Institute of Scientific and Technical Information of China (English)

    刘书杰; 李相方; 何英明; 耿亚楠; 周建良

    2015-01-01

    深水钻井具有较高风险,在救援井设计方面,国内外没有相关标准规范可参照,深水井实施救援井作业的数量也很少。为了保证深水油气田安全高效开发,结合中国南海深水钻井的需要,对深水救援井的井位选择、井眼轨迹设计方法、探测定位技术、连通技术、动态压井方法等一系列关键技术进行了整理和分析。救援井的井位选择需考虑海底地质条件、洋流、风向、热辐射、商业保险等因素,救援井井眼轨迹需根据连通点位置、探测定位工具的要求、轨迹实施难度进行设计,连通方式首选直接钻通事故井井眼,动态压井方案的制定应结合钻井船的能力优选最高效安全的压井方案。研究结果对于建立深水救援井设计体系具有一定的参考价值。%There is great risk in deepwater drilling and there is no international standard for reference regarding the design of relief well drilling, and not many relief wells are drilled for deepwater wells. In order to ensure safe and efifcient development of deepwater oil/gas ifelds and in conjunction with the requirement of deepwater drilling in the South China Sea, a number of key technologies have been arranged and analyzed such as selection of relief well location, method of wellbore trajectory design, detection and location technology, connection technique, dynamic well killing technique, etc. The selection of relief well location should take into consideration the submarine geological conditions, ocean currents, wind directions, thermal radiation, commercial insurance, etc. The trajectory of relief well should be designed according to the location of connecting point, the requirement of detection and location tools and dififculty in following the trajectory. The preferred connecting method is to directly penetrate the borehole of trouble well. The formulation of dynamic killing program should be the most efifcient and safest

  2. Effect of Nitric Acid on the Low Fluorescing Performance of Drilling Fluid Lubricant Based Animal and Vegetable Oils

    Directory of Open Access Journals (Sweden)

    Feng-shan Zhou

    2013-01-01

    Full Text Available After synthesis of mixed fatty acid triethanolamine ester surfactant based on animal and vegetable mixed oils, the reaction solution was added into 4% (wt/wt liquid nitric acid or 9% (wt/wt solid nitric acid as eliminating fluorescent agent continuing to react from 1 to 2 hours. The low fluorescence lubricant named E167 for drilling fluid was prepared, in which maximum fluorescence intensity (Fmax was less than 10 in three-dimensional fluorescence spectra of excitation wavelength range. When the E167 was added into fresh water based drilling fluid at the dosage of 0.5% (wt/wt, the sticking coefficient reduced rate (ΔKf is 78% and the extreme pressure (E-P friction coefficient reduced rate (Δf is 79%. In the case of 4% brine mud with 0.5% (wt/wt E167 in it, the ΔKf and Δf are 75% and 62%, respectively. After the hot rolling ageing test 180°C × 16 h with the E167 was added into fresh water based drilling fluid at the dosage of 1% (wt/wt, the ΔKf and Δf are greater than 70%, which shows a much better lubrication properties of strong resistance to high temperature. The fresh water based drilling fluid which contains 1% (wt/wt E167 is almost nonfoaming even after hot rolling ageing 120°C × 16 h.

  3. Application of KCl polysulfonate drilling fluid in the third drilling of well TP338H%KCl聚磺钻井液在TP338H井三开的应用

    Institute of Scientific and Technical Information of China (English)

    范落成; 王杰东; 何小明; 胡林

    2015-01-01

    在TP338H井的几口邻井施工时,三开井段均采用常规聚磺钻井液体系,在钻井过程中,PDC钻头泥包、井壁失稳垮塌、下钻大段划眼等复杂情况时有发生,严重影响了钻井施工进度。通过查询和调研相关钻井液资料,决定在TP338H井三开使用KCl聚磺钻井液体系,以聚磺钻井液为基础,通过加入KCl来增强其抑制性和防塌性能。室内性能评价表明,KCl聚磺钻井液的抑制防塌性、高温稳定性、抗污染性、润滑性及流变性能均优于常规聚磺钻井液体系。该井三开井段施工顺利,未出现钻头泥包、严重垮塌等复杂情况,KCl聚磺钻井液体系在该井取得了良好的应用效果,对以后该区块的钻井液施工具有很好的参考意义。%In the construction of adjacent wells of well TP338H, the third drilling sections all adopted the conventional polysulfo⁃nate drilling fluid. In the process of drilling, some complex situations often occurred, including PDC bit balling, wellbore instability and long section reaming, which affected the drilling construction schedule seriously. Through researching the related materials of drilling fluid, in the third drilling of well TP338H, KCl polysulfonate drilling fluid system was adopted. Using polysulfonate drilling fluid as the foundation, the inhibition and anti collapse properties were enhanced by adding KCl. The indoor results show that, the performances of KCl polysulfonate drilling fluid system are superior to those of conventional polysulfonate drilling fluid system, among them, the performances include inhibition and anti collapse, high temperature stability, anti pollution ability, lubricity and rheological properties. The third drilling construction of this well was smooth, and the complex situations including bit balling and serious collapse were not happened. KCl polysulfonate drilling fluid system achieves good results in the well, thereby offering good

  4. Technical standardization of oil well abandonment: a review of current standards and technologies

    Energy Technology Data Exchange (ETDEWEB)

    Suzart, J. Walter P.; Pessoa, Laudemar; Paiva, Maria [Halliburton Energy Services (HES), Duncan, OK (United States)

    2008-07-01

    The objective of this study is to provide a new methodology for well abandonment. This practice is becoming more and more important because of the increasing number of production fields being abandoned. We strongly recommend a study of cement slurries properties for specific use in temporary and permanent abandonment plugs based on the estimation of the cement slurry hardened when placed in the well. By using specific additives, it is possible to achieve very stable slurries. For example, when permeability is reduced, formation fluid migration can be blocked and chemical reactions between the fluid and the slurry may be inhibited. With this objective, we present a laboratory investigation model and an example of slurry testing recommendation. During the abandonment operation, all records of the well characteristics should be maintained to include the reason for the abandonment, and location of fresh water, brine, and hydrocarbon zones that may exist. This documentation will also allow the analysis of solutions for the problems that originally caused the abandonment of the well. This data could be important for future use by environmental protection commissions to reopen or to drill an adjacent well. Given the high price of oil, it may now be economically feasible to reopen the well, if the reason for abandonment was low productivity. This way, a critical analysis of the current conditions of well and field abandonment in the country is presented. Based on this information, a review of the current standards is suggested. (author)

  5. Reverse trade mission on the drilling and completion of geothermal wells

    Energy Technology Data Exchange (ETDEWEB)

    1989-09-09

    This draft report was prepared as required by Task No. 2 of the US Department of Energy, Grant No. DE-FG07-89ID12850 Reverse Trade Mission to Acquaint International Representatives with US Power Plant and Drilling Technology'' (mission). As described in the grant proposal, this report covers the reactions of attendees toward US technology, its possible use in their countries, and an evaluation of the mission by the staff leaders. Note this is the draft report of one of two missions carried out under the same contract number. Because of the diversity of the mission subjects and the different attendees at each, a separate report for each mission has been prepared. This draft report has been sent to all mission attendees, specific persons in the US Department of Energy and Los Alamos National Lab., the California Energy Commission (CEC), and various other governmental agencies.

  6. Integrated 3D geology modeling constrained by facies and horizontal well data for Block M of the Orinoco heavy oil belt

    Energy Technology Data Exchange (ETDEWEB)

    Longxin, M.; Baojun, X.; Shancheng, Z.; Guoqing, H. [CNPC America Ltd., Caracas (Venezuela)

    2008-10-15

    Horizontal well drilling with cold production were used to develop most of heavy oil fields in Venezuela's Orinoco heavy oil belt. This study interpreted the horizontal well logs of Block M of the Orinoco heavy oil belt in an effort to improve production from this highly porous and permeable reservoir. The reservoir is comprised primarily of non-consolidated sandstones. A porosity calculation formula for the horizontal well without porosity logs was established based on the study of horizontal well logging data of block M in the Orinoco heavy oil belt. A high quality 3-D simulation tool was used to separate the block into several different sections. A set of methods were presented in order to identify if the well track was approaching an adjacent formation, to estimate the distance between the well track and the adjacent formation, and to correct the deep resistivity of the horizontal section affected by the adjacent formation. A set of interpretation techniques were established, based on the combination of well logging data, seismic data and the oilfield development performance data. It was concluded that the development of the precise 3D geological model helped to establish a solid foundation for guiding the well position design and the drilling of the horizontal well. It also contributed to the reservoir numerical simulation and the effective development of the oil field. 6 refs., 2 tabs., 14 figs.

  7. State uses of Exxon and Stripper Well oil overcharge funds

    Energy Technology Data Exchange (ETDEWEB)

    Gonzales, H.

    1989-08-01

    This report incorporates information collected by NCLC in telephone surveys conducted from July through August 1989. As with the previous reports, the information we collected on the status and state uses of both Exxon and Stripper Well funds is contained in a series of tables and in the narrative summary section of the report. Section 1 of the report provides background information regarding the two main sources of oil overcharge funds distributed to the states since 1986 (the Exxon and Stripper Well cases). Section 2 provides a brief overview of NCLC's findings on the status of state allocation decisions and on specific uses of these funds. Section 3 of the report, which provides a narrative summary of each state's Exxon and Stripper Well oil overcharge allocations, gives specific examples of some of the programs or projects funded with both these funds, with an emphasis on low-income uses. While information for some states may include all allocations made, the narrative section is not intended to be an exhaustive list of funded projects. Where available, the allocation process used by each state is also provided. Finally, Section 4 contains important notes, relating to the series of tables that follow, as well as the tables themselves. 10 tabs.

  8. 30 CFR 250.402 - When and how must I secure a well?

    Science.gov (United States)

    2010-07-01

    ... GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations General Requirements § 250.402 When and how must I secure a well? Whenever you interrupt drilling operations, you must...) Inability to keep the drilling rig on location; or (3) Repair to major drilling or well-control...

  9. Localization of polycyclic aromatic hydrocarbons and heavy metals in surface soil of Asia’s oldest oil and gas drilling site in Assam, north-east India: Implications for the bio-economy

    Directory of Open Access Journals (Sweden)

    Hemen Sarma

    2016-09-01

    Full Text Available The environmental influx of hazardous contaminants viz PAHs and HMs occurs due to oil and gas drilling, and processing of petroleum products in industrial facilities and refineries. This problem plagues crude oil drilling sites as PAHs are an essential component of and HMs coexist with crude oil. We analyzed the spatial distribution of 16 PAHs and 8 HMs in 10 contaminated sites of Assam, a state in India. These included Digboi, where crude oil was drilled in 1867 and the first oil well in Asia that was drilled. The Ʃ16 PAHs in soil were detected with a minimum of 13.48 and a maximum of 86.3 mgkg−1 and Ʃ 8 heavy metal concentrations in the soil ranged between 69.51 and 336.06 mgkg−1. A negative correlation was detected between the relative concentrations of PAHs and HMs. The results confirmed that the non-biodegradable nature of HMs made them stay in the soil for longer periods of time. In our study, we found that the levels of lead, copper, nickel, and chromium (total in soil were 73.62, 11.86, 58.97 and 158.66 mgkg−1. The recovery percentage for PAHs and HMs were in the range of 67–97% and 90–95% respectively. Spatial distribution indices for Phenanthrene/Anthracene, Naphthalene/Acenapthhylene, Chyrsene/Benzo (g, h, i perylene and Fluranthene/Pyrene calculated for soil samples indicated that the spatial distribution of PAHs in soil is uneven which might be due to variations in contaminates disseminated in soil. Such regionalized concentration has serious implications on the bio-economy both in terms of health and economy, especially since the proximity of crude oil sites to paddy fields and/or tea plantations uniquely marks the landscape of upper Assam.

  10. Evidence of emissions from oil and gas drilling operations in northeastern Colorado

    Science.gov (United States)

    Petron, G.; Montzka, S. A.; Karion, A.; Miller, B. R.; Frost, G. J.; Hirsch, A.; Sweeney, C.; Andrews, A. E.; Dlugokencky, E. J.; Hall, B. D.; Trainer, M.; Welsh, D. C.; Wolfe, D. E.; Tans, P. P.

    2010-12-01

    Since 2007, air samples collected regularly at NOAA tall towers and from aircraft across the US have been analyzed for over sixty different species, including greenhouse gases (CO2, CH4, N2O, SF6), CO, several hydrocarbons (propane, n-butane, pentanes, benzene, acetylene), and ozone-depleting substances. The Boulder Atmospheric Observatory (BAO) is a 300-m tall tower located 35 km north of the Denver metropolitan area in the northern Colorado Front Range. The BAO sits on the southwestern edge of the Denver-Julesburg Basin (DJB), home to over 15,000 oil and gas wells. Using in-situ meteorological data, we analyze the air composition of the BAO samples for three different wind sectors: the North and East sector (with strong contributions from oil and gas production operations and cattle feedlots), the South sector (dominated by the Denver urban area), and the West sector (containing the foothills of the Rocky Mountains and a few oil and gas wells). Air samples from the BAO North and East sector exhibit enhanced levels of alkanes that are strongly correlated with each other. To put these BAO samples in a regional context, we drove a mobile laboratory around BAO during the summer of 2008. A continuous methane analyzer was used to detect regional enhancements in methane and local plumes from point sources (including a natural gas processing plant, feedlot, and waste water treatment plant). Targeted air samples within and outside of plumes were collected and later analyzed in the NOAA lab. Samples collected over the DJB show very similar molar ratios of alkanes as the BAO samples from the North and East sector. These alkane ratios compare very well with the ratios measured in over 70 natural gas samples collected at various wells in the DJB in 2006.

  11. Numerical Simulation of Geostress and Pore Pressure Evolution around Oil or Water Well under Different Injection-Production Ratio

    Directory of Open Access Journals (Sweden)

    Liu Jian-jun

    2013-01-01

    Full Text Available Geostress evolution in the process of oil field development can directly influence wellbore stability. Therefore, it is significant to strengthen the research of the evolution rule for well drilling and casing protection. Considering the interaction between reservoir seepage and stress fields, a mathematical model to characterize the stress evolution around wellbore was built. Using the FEM Software ABAQUS, through numerical simulation, the authors studied the evolution features of pore pressure and stress changes with time under different injection-production ratio, which disclosed the dynamic change regulation of pore pressure and stress of surrounding rock nearby the injection and production wells. These results may have implications in the treatment of wellbore stability and optimizing the injection and production processes during oil and gas production.

  12. Ultrasonic technology for enhanced oil recovery from failing oil wells and the equipment for its implemention.

    Science.gov (United States)

    Abramov, Vladimir O; Mullakaev, Marat S; Abramova, Anna V; Esipov, Igor B; Mason, Timothy J

    2013-09-01

    A new method for the ultrasonic enhancement of oil recovery from failing wells is described. The technology involves lowering a source of power ultrasound to the bottom of the well either for a short treatment before removal or as a permanent placement for intermittent use. In wells where the permeability is above 20 mD and the porosity is greater than 15% ultrasonic treatment can increase oil production by up to 50% and in some cases even more. For wells of lower permeability and porosity ultrasonic treatment alone is less successful but high production rates can be achieved when ultrasound is applied in conjunction with chemicals. An average productivity increase of nearly 3 fold can be achieved for this type of production well using the combined ultrasound with chemical treatment technology. Copyright © 2013 Elsevier B.V. All rights reserved.

  13. Case-Based Reasoning Method in Cost Estimation of Drilling Wells

    OpenAIRE

    Hossein Shams Mianaei; Seyed Hossein Iranmanesh

    2013-01-01

    Aim of study is the cost estimation of drilling6T8T 6T8Twells6T8T 6T8Tusing6T Case-Based 6TReasoning6T8T (CBR) method which6T8T is created based6T8T 6T8Ton6T8T 6T8Tthe6T8T 6T8Tviewpoint of using presented6T8T 6T8Tsolutions6T8T 6T8Tfor6T8T 6T8Tprevious6T8T 6T8Tsolved6T8T 6T8Tproblems6T8T in order 6T8Tto solve6T8T new 6T8Tsimilar problems6T8T. 6T8TIn companies6T8T 6T8Tor6T8T 6T8Torganizations6T8T which 6T8Tcost estimation, scheduling,6T8T 6T8Tdesign6T8T, planning 6T8Tand project activities6T8T ...

  14. Case-Based Reasoning Method in Cost Estimation of Drilling Wells

    OpenAIRE

    Hossein Shams Mianaei; Seyed Hossein Iranmanesh

    2013-01-01

    Aim of study is the cost estimation of drilling6T8T 6T8Twells6T8T 6T8Tusing6T Case-Based 6TReasoning6T8T (CBR) method which6T8T is created based6T8T 6T8Ton6T8T 6T8Tthe6T8T 6T8Tviewpoint of using presented6T8T 6T8Tsolutions6T8T 6T8Tfor6T8T 6T8Tprevious6T8T 6T8Tsolved6T8T 6T8Tproblems6T8T in order 6T8Tto solve6T8T new 6T8Tsimilar problems6T8T. 6T8TIn companies6T8T 6T8Tor6T8T 6T8Torganizations6T8T which 6T8Tcost estimation, scheduling,6T8T 6T8Tdesign6T8T, planning 6T8Tand project activities6T8T ...

  15. Application of hydraulic pulse cavitating jet technology in unconventional well drilling%水力脉冲空化射流技术在非常规钻井中的应用

    Institute of Scientific and Technical Information of China (English)

    辛建华

    2012-01-01

    For some unconventional wells, due to old stratum and poor drillability, it takes longer drilling period and encounters more complex situation, including obvious decline of mechanical drilling rate and soaring drilling cost. Based on the drilling prac-tice of unconventional wells, it is found that conventional drilling technique cannot slove the problems of low mechanical drilling rate and long drilling period. Through research, oil experts found that, under the conditions of fixed hydraulic parameters, the use of pulse jet and cavitating jet could have a greater impact load, improve the efficiency of rock clearing and rock breaking, and success-fully resolve the problem of low mechanical drilling rate and long drilling period. By tracking and comparative analysis of the appli-cation of hydraulic pulse cavitating jet technology in the drilling of unconventional wells, this paper researched on the feasibility of enhancing mechanical drilling rate by the technology and explored the means to improve the tools structure of the technology, hy-draulic parameters, drilling tools combination and the adaptability of the technology to stratum. All the researches above were of practical meanings in making technical preparation for the improvement of mechanical drilling rate of unconventional wells.%部分非常规井由于地层古老,岩性致密,可钻性差,钻井周期长,钻井过程中遇到的复杂情况增多,机械钻速下降幅度明显增大,同时钻井成本也急剧增加。从非常规钻井施工实际不难发现,采用传统钻井工艺和方式不能解决钻井机械钻速低,钻井周期长等难题。目前,石油专家通过探索研究发现,在水力参数不变的条件下,利用脉冲射流和空化射流能够产生较大的冲击载荷,提高清岩和破岩效率,从而顺利解决了钻井机械钻速低,钻井周期长等难题。通过跟踪、对比分析水力空化射流钻井技术在非常规钻井中的应

  16. Data regarding hydraulic fracturing distributions and treatment fluids, additives, proppants, and water volumes applied to wells drilled in the United States from 1947 through 2010

    Science.gov (United States)

    Gallegos, Tanya J.; Varela, Brian A.

    2015-01-01

    Comprehensive, published, and publicly available data regarding the extent, location, and character of hydraulic fracturing in the United States are scarce. The objective of this data series is to publish data related to hydraulic fracturing in the public domain. The spreadsheets released with this data series contain derivative datasets aggregated temporally and spatially from the commercial and proprietary IHS database of U.S. oil and gas production and well data (IHS Energy, 2011). These datasets, served in 21 spreadsheets in Microsoft Excel (.xlsx) format, outline the geographical distributions of hydraulic fracturing treatments and associated wells (including well drill-hole directions) as well as water volumes, proppants, treatment fluids, and additives used in hydraulic fracturing treatments in the United States from 1947 through 2010. This report also describes the data—extraction/aggregation processing steps, field names and descriptions, field types and sources. An associated scientific investigation report (Gallegos and Varela, 2014) provides a detailed analysis of the data presented in this data series and comparisons of the data and trends to the literature.

  17. An innovative drilling system

    Energy Technology Data Exchange (ETDEWEB)

    Nees, J.; Dickinson, E.; Dickinson, W.; Dykstra, H.

    1991-05-01

    The principal project objectives were the following: To demonstrate the capability of the Ultrashort Radius Radial System to drill and complete multiple horizontal radials in a heavy oil formation which had a production history of thermal operations. To study the effects that horizontal radials have on steam placement at specific elevations and on reducing gravity override. To demonstrate that horizontal radials could be utilized for cyclic production, i.e. for purposes of oil production as well as for steam injection. Each of these objectives was successfully achieved in the project. Early production results indicate that radials positively influenced cyclic performance. This report documents those results. 15 refs., 29 figs., 1 tab.

  18. Identification and quantification of alkene-based drilling fluids in crude oils by comprehensive two-dimensional gas chromatography with flame ionization detection.

    Science.gov (United States)

    Reddy, Christopher M; Nelson, Robert K; Sylva, Sean P; Xu, Li; Peacock, Emily A; Raghuraman, Bhavani; Mullins, Oliver C

    2007-04-27

    Comprehensive two-dimensional gas chromatography with flame ionization detection (GC x GC-FID) was used to measure alkene-based drilling fluids in crude oils. Compared to one-dimensional gas chromatography, GC x GC-FID is more robust for detecting alkenes due to the increased resolution afforded by second dimension separations. Using GC x GC-FID to analyze four oil samples from one reservoir contaminated with the same drilling fluid, C(15), C(16), C(17), C(18) and C(20) alkenes were identified. The drilling fluid that contaminated these samples also differed from another commercially obtained fluid, which only contained C(16) and C(18) alkenes. These results should motivate the petroleum industry to consider GC x GC-FID for measuring drilling fluids.

  19. Modeling and analysis of stick-slip and bit bounce in oil well drillstrings equipped with drag bits

    Science.gov (United States)

    Kamel, Jasem M.; Yigit, Ahmet S.

    2014-12-01

    Rotary drilling systems equipped with drag bits or fixed cutter bits (also called PDC), used for drilling deep boreholes for the production and the exploration of oil and natural gas, often suffer from severe vibrations. These vibrations are detrimental to the bit and the drillstring causing different failures of equipment (e.g., twist-off, abrasive wear of tubulars, bit damage), and inefficiencies in the drilling operation (reduction of the rate of penetration (ROP)). Despite extensive research conducted in the last several decades, there is still a need to develop a consistent model that adequately captures all phenomena related to drillstring vibrations such as nonlinear cutting and friction forces at the bit/rock formation interface, drive system characteristics and coupling between various motions. In this work, a physically consistent nonlinear model for the axial and torsional motions of a rotating drillstring equipped with a drag bit is proposed. A more realistic cutting and contact model is used to represent bit/rock formation interaction at the bit. The dynamics of both drive systems for rotary and translational motions of the drillstring, including the hoisting system are also considered. In this model, the rotational and translational motions of the bit are obtained as a result of the overall dynamic behavior rather than prescribed functions or constants. The dynamic behavior predicted by the proposed model qualitatively agree well with field observations and published theoretical results. The effects of various operational parameters on the dynamic behavior are investigated with the objective of achieving a smooth and efficient drilling. The results show that with proper choice of operational parameters, it may be possible to minimize the effects of stick-slip and bit-bounce and increase the ROP. Therefore, it is expected that the results will help reduce the time spent in drilling process and costs incurred due to severe vibrations and consequent

  20. Ionic interactions in the water zone at oil well-sites

    Energy Technology Data Exchange (ETDEWEB)

    Kleven, R.

    1996-11-01

    The aim of this doctoral thesis has been to obtain a better understanding of ionic behaviour in a water zone of sedimentary rock exposed to sea-water based drilling fluid and completion fluid. Interaction processes addressed have been ion exchange on the surface of the reservoir rocks and precipitation of divalent cations with sulphate ions from the sea water. Clay minerals are focused on because of their ability to conduct electricity through ion-exchange reactions. The most important parameters that the distribution of ions around a borehole depends upon are suggested to be (1) the ability of the sedimentary rocks to sorb/desorb ions, (2) the effect of added solutions on the sorption/desorption processes, (3) the mobility of ions. The first of four enclosed papers studies ionic interaction, mainly on homo-ionic clay mineral - salt solution, in batch experiments under pH, ionic strength and temperature conditions likely to occur in the field. Paper II investigates the use of tritiated water as a reference tracer in miscible displacement processes in porous sandstone cores. Ionic interaction processes during drilling of oil wells with conventional KCl bentonite mud tagged with HTO were studied by means of measured ionic and HTO concentration of water sampled in the near well-bore region. A tracer method was developed and ``tracer diagrams`` illustrate sorption/desorption processes. The water analyses, sampling procedure, and tracer techniques are presented in the third paper. Paper IV compares the interpretation of laboratory data and field data. 173 refs., 47 figs., 22 tabs.

  1. Movement features of gas in different types of drilling lfuid during kicking in deepwater wells%深水井气侵在不同类型钻井液中运动特征

    Institute of Scientific and Technical Information of China (English)

    张玉山; 赵维青; 张星星; 李双

    2016-01-01

    深水井钻井液密度窗口一般小于0.06 g/cm3,压井过程中容易压漏地层,研究气体在不同钻井液类型中的运动规律有利于正确及时处理井控。通过对多相流的理论研究和计算,采用2口井的钻井液和实钻数据,结合Drillbench软件进行校核,得出了气体在不同钻井液类型中的运动特性;通过研究得出,天然气在水基钻井液中内部表现为气体滑脱和膨胀,长时间的关井会导致压破上层套管鞋;而在油基或者合成基钻井液中,则表现为气体溶解进其中,气体达到泡点压力后再次脱出;而在溢流发现难度上,水基钻井液相对容易发现,而油基钻井液由于气体溶解到钻井液内,溢流不易被发现。研究结果为深水井设计和现场安全处理井控事件奠定理论基础。%The drilling lfuids for deepwater drilling can break down the formations easily during well killing for its density window is generally less than 0.06 g/cm3. In order to perform well control accurately in time, it is necessary to study the movement features of gas in different types of drilling lfuid. After multiphase lfow was theoretically analyzed and calculated, the results were checked by using the DrillbenchSoftware based on drilling lfuid and actual drilling data of two wells. In this way, the movement features of gas in different types of drilling lfuid were identiifed. The gas in water-base drilling lfuid is presented in the form of slippage and expansion, and it can break the upper casing shoe after long-term well shut in. In oil-base or synthetic-base drilling lfuids, the gas is dissolved and then migrates out when the bubble point pressure is reached. It is easier to detect the kick in water-base drilling lfuid than in oil-base drilling lfuid, for the gas is dissolved into the latter one. This paper strengthens the understanding on the deepwater well control and provides the theoretical basis for deepwater well

  2. Experimental and numerical study on casing wear in highly deviated drilling for oil and gas

    Directory of Open Access Journals (Sweden)

    Hao Yu

    2016-06-01

    Full Text Available Aimed at studying the casing wear in the highly deviated well drilling, the experimental study on the casing wear was carried out in the first place. According to the test data and the linear wear model based on the energy dissipation proposed by White and Dawson, the tool joint–casing wear coefficient was obtained. The finite element model for casing wear mechanism research was established using ABAQUS. The nodal movement of the contact surface was employed to simulate the evolution of the wear depth, exploiting the Umeshmotion user subroutine. In addition, the time-dependent geometry of the contact surfaces between the tool joint and casing was being updated continuously. Consequently, the contact area and contact pressure were changed continuously during the casing wear process, which gives a more realistic simulation. Based on the shapes of worn casing, the numerical simulation research was carried out to determine the remaining collapse strength. Then the change curve of the maximum casing wear depth with time was obtained. Besides, the relationship between the maximum wear depth and remaining collapse strength was established to predict the maximum wear depth and the remaining strength of the casing after a period of accumulative wear, providing a theoretical basis for the safety assessment of worn casing.

  3. Preparation of fluidized catalytic cracking slurry oil-in-water emulsion as anti-collapse agent for drilling fluids

    Directory of Open Access Journals (Sweden)

    Zhengqiang Xiong

    2016-12-01

    Full Text Available Fluidized catalytic cracking slurry oil-in-water emulsion (FCCSE was prepared by using interfacial complexes generation method that was simple and versatile. The critical factors influencing the sample preparation process were optimized, for instance, the optimum value of the mixed hydrophile-lipophile balance of compound emulsifier was 11.36, the content of compound emulsifier was 4 wt%, the emulsification temperature was 75 °C, the agitation speed was 200 rpm, and the emulsification time was 30–45 min. The performance as a drilling fluid additive was also investigated with respect to rheological properties, filtration loss and inhibition of FCCSE. Experimental results showed that FCCSE was favorable to inhibiting clay expansion and dispersion and reducing fluid loss. Furthermore, it had good compatibility with other additives and did not affect the rheological properties of drilling fluids. FCCSE exhibited better performance than the available emulsified asphalt. It has a promising application as anti-collapse agent in petroleum and natural gas drilling.

  4. New developments of steerable motorsystems for drilling for oil and gas. Neue Entwicklungen und Felderfahrungen auf dem Gebiet steuerbarer Motorsysteme fuer Tiefbohrungen auf Erdoel und Erdgas

    Energy Technology Data Exchange (ETDEWEB)

    Juergens, R.; Krueger, V. (Eastman Christensen GmbH, Celle (Germany, F.R.))

    1991-04-01

    The improvements regarding drilling techniques and exploitation of oil and gas reservoirs are a major challenge to achieve better economics and to take care of the only limited resources. A significant contribution to achieve this objective is the development of steerable drilling motors, that allow faster and more precise directional drilling and also enable to reach laterally extended and horizontal reservoirs. Beginning with first steerable motors in the early eighties, systems have been enhanced, their range of application was enlarged and tailormade new systems were developed and introduced in the field. (orig.).

  5. Routine Drilling Fluid Technology in the Application of Under-balanced Well%常规钻井液技术在欠平衡井中的应用

    Institute of Scientific and Technical Information of China (English)

    王鹏; 兰正升; 王建博

    2011-01-01

    四川油田早在20世纪60年代就开始了边喷边钻作业实践,在90年代中后期,该技术在国内迅速发展,并取得显著的成效,并在钻井中采用泡沫、空气、常规钻井液等作为循环介质,本文主要介绍常规钻井液技术在欠平衡井段的应用、工艺流程、技术措施,并对施工中遇到的复杂情况进行分析总结.%Sichuan oil field as early as 60 years in the 20th century, began drilling operations side spray edge practice in the late 90's, the rapid development of the technology in the country, and achieved remarkable results, and used in the drilling foam, air, conventional drilling fluid as die circulating medium, the paper introduces the conventional under-balanced drilling technology in the well section of the application process, technical measures, and the complexities encountered in the construction were analyzed and summarized.

  6. Organophilization of bentonite clays with non-ionic surfactants aiming their use in drilling fluids base oil; Organofilizacao de argilas bentoniticas com tensotivo nao-ionico visando seu uso em fluidos de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, I.A.; Costa, J.M.R.; Neves, G.A.; Ferreira, H.C. [Universidade Federal de Campina Grande (UAEMa/CCT/UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais; Ferreira, H.S. [Universidade Federal da Paraiba (DEMAT/CT/UFPB), Joao Pessoa, PB (Brazil). Dept. de Materiais

    2010-07-01

    The use of nonionic surfactants has been replacing the traditional ionic surfactants among others by its high potential for resistance to thermal degradation. This work aims at the development of organoclay by the addition of nonionic surfactants for use in drilling fluids for oil wells based oil. The bentonite clay was organophilized and then characterized by X-ray diffraction and swelling Foster, seeking the most appropriate choice of surfactant to liquid organic dispersing media: ester, diesel and paraffin. With the obtained dispersions were measured apparent viscosities and plastic. The results showed that incorporation of surfactants used in the clay interlayer spacing increased significantly and that the dispersions showed rheological properties within the specifications of PETROBRAS, for the use of organophilic clays in drilling fluids in a non-aqueous base. (author)

  7. Optimizing the drilled well patterns for CBM recovery via numerical simulations and data envelopment analysis

    Institute of Scientific and Technical Information of China (English)

    Luo Jinhui; Yang Yongguo; Chen Yuhua

    2012-01-01

    Coalbed methane (CBM) commercial development requires choosing the arrangement of the wells.This should be done by considering the corresponding input-output (investment-profit) efficiencies.Simulations were obtained from the computer modeling group (CMG) given the reservoir conditions of the Panzhuang block in the southern part of the Qinshui Basin.This is a demonstration region for CBM development located in Shanxi province of northern China.The sensitivity of gas production from a single vertical well to the primary reservoir parameters was estimated first.Then multi-well gas production from three different well patterns was simulated to estimate the most appropriate well spacing.Combining the investment requirements then gave investment-profit efficiencies for these well patterns.A data envelopment analysis (DEA) model was used to optimize the efficiency.The results show that the permeability,the reservoir pressure,and the gas content have an evident impact on single well gas production.The desorption time has little or no affect on production.The equilateral triangular well pattern (ETWP)in a 400 m well spacing is,for multi-well development,the optimal pattern.It has a better input-output ratio,a longer stable yield time,and provides for greater CBM recovery than does either the rectangular well pattern (RWP) or the five point well pattern (FPWP).

  8. The Novel Method to Estimate Effect of Cement Slurry Consistency toward Friction Pressure in Oil/Gas Well Cementing

    Directory of Open Access Journals (Sweden)

    Adrian Pattinasarany

    2012-11-01

    Full Text Available The aim of this study is to investigate effect of cement slurry consistency toward friction pressure during oil/gas cementing operation. Completion of an oil/gas well has become more important because the reserve has become harder to find. The oil/gas company cannot afford to lose million dollars they spent when locating, drilling and recovering the oil from the Earth if they failed it. The safety, health and environment also have become more important issue, because any completion problem can lead to prolong operation and creating more hazard and risk. Cementing operation plays a very important role during completion because it creates a secure conduit to bring the precious oil/gas to the surface and a place to install completion jewelry. During cementing operation lost circulation can be one of the serious problems that arise. Circulation is said to be lost when the cement slurry pumped flows into one or more geological formations instead of returning up casing annulus. This is due to sum of hydrostatic pressure and friction pressure is exceeding fracture gradient. Method that commonly used to calculate friction from American Petroleum Institute (API assumed the cement slurry will exhibit time independent nature. Cement slurry consistency was found to have significant effect to friction pressure.

  9. HETEROGENEOUS SHALLOW-SHELF CARBONATE BUILDUPS IN THE PARADOX BASIN, UTAH AND COLORADO: TARGETS FOR INCREASED OIL PRODUCTION AND RESERVES USING HORIZONTAL DRILLING TECHNIQUES

    Energy Technology Data Exchange (ETDEWEB)

    David E. Eby; Thomas C. Chidsey, Jr.; Kevin McClure; Craig D. Morgan

    2003-07-01

    The Paradox Basin of Utah, Colorado, Arizona, and New Mexico contains nearly 100 small oil fields producing from carbonate buildups within the Pennsylvanian (Desmoinesian) Paradox Formation. These fields typically have one to 10 wells with primary production ranging from 700,000 to 2,000,000 barrels (111,300-318,000 m{sup 3}) of oil per field and a 15 to 20 percent recovery rate. At least 200 million barrels (31.8 million m{sup 3}) of oil will not be recovered from these small fields because of inefficient recovery practices and undrained heterogeneous reservoirs. Several fields in southeastern Utah and southwestern Colorado are being evaluated as candidates for horizontal drilling and enhanced oil recovery from existing vertical wells based upon geological characterization and reservoir modeling case studies. Geological characterization on a local scale is focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible reservoir compartmentalization, within these fields. This study utilizes representative cores, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells. The results of these studies can be applied to similar fields elsewhere in the Paradox Basin and the Rocky Mountain region, the Michigan and Illinois Basins, and the Midcontinent region. This report covers research activities for the second half of the third project year (October 6, 2002, through April 5, 2003). The primary work included describing and mapping regional facies of the upper Ismay and lower Desert Creek zones of the Paradox Formation in the Blanding sub-basin, Utah. Regional cross sections show the development of ''clean carbonate'' packages that contain all of the productive reservoir facies. These clean carbonates abruptly change laterally into thick anhydrite packages that filled several small intra-shelf basins in the upper Ismay zone

  10. Oil and Gas Wells - U.S. Fish and Wildlife Service Lands

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This geospatial dataset contains oil and gas wells that intersect either the U.S. Fish and Wildlife Service interest or approved boundary or both. Oil and gas wells...

  11. Oil and Gas Wells - U.S. Fish and Wildlife Service Lands

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This geospatial dataset contains oil and gas wells that intersect either the U.S. Fish and Wildlife Service interest or approved boundary or both. Oil and gas wells...

  12. Case Studies of Water Shut-Off Treatments in Oil and Gas Production Wells

    National Research Council Canada - National Science Library

    Sławomir Falkowicz; Stanisław Dubiel; Renata Cicha-Szot

    2012-01-01

      Case Studies of Water Shut-Off Treatments in Oil and Gas Production Wells In this study some of the experimental results of water shut-off treatments in oil and gas production wells were presented...

  13. Evaluation of commercial drilling and geological software for deep drilling applications

    Science.gov (United States)

    Pierdominici, Simona; Prevedel, Bernhard; Conze, Ronald; Tridec Team

    2013-04-01

    The avoidance of operational delays, financial losses and drilling hazards are key indicators for successful deep drilling operations. Real-time monitoring of drilling operation data as well as geological and petrophysical information obtained during drilling provide valuable knowledge that can be integrated into existing geological and mechanical models in order to improve the drilling performance. We have evaluated ten different geological and drilling software packages capable to integrate real-time drilling and planning data (e.g. torque, drag, well path, cementing, hydraulic data, casing design, well control, geo-steering, cost and time) as well as other scientific and technical data (i.e. from drilling core, geophysical downhole logging, production test) to build geological and geophysical models for planning of further deep drillings in a given geological environment. To reach this goal, the software has to be versatile to handle different data formats from disciplines such as geology, geophysics, petrophysics, seismology and drilling engineering as well as data from different drilling targets, such as geothermal fluids, oil/gas, water reservoirs, mining purpose, CO2 sequestration, or scientific goals. The software must be capable to analyze, evaluate and plan in real-time the next drilling steps in the best possible way and under safe conditions. A preliminary geological and geophysical model with the available data from site surveys and literature is built to address a first drilling plan, in which technical and scientific aspects are taken into consideration to perform the first drilling (wildcat well). During the drilling, the acquired scientific and technical data will be used to refine the previous geological-drilling model. The geological model hence becomes an interactive object strongly linked to the drilling procedure, and the software should allow to make rapid and informed decisions while drilling, to maximize productivity and minimize drilling

  14. Appreciation of environmental risks analysis methodologies in the offshore well drilling activities; Analise de metodologias na avaliacao de riscos ambientais relacionados as atividades de perfuracao de pocos maritimos

    Energy Technology Data Exchange (ETDEWEB)

    Zampolli, Daniella M. [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil); Morooka, Celso K. [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Engenharia de Petroleo

    2004-07-01

    Nowadays, the projects of products and processes are supposed to integrate environmental risks criteria, in addition to their inherent operation impacts. Industrial activities, in general, generate risks to the environment, and, in case of incidents occurrence, many of the possible consequences can be translated into serious impacts. The Risk Analysis is destined to act as a decision tool in the environmental area, and therefore, the use of one of these during the project phase of an enterprise becomes important, aiming the guarantee of the system reliability. The present article has the purpose of analyzing methodologies that are being employed for the environmental risk analysis, as well as usual procedures applied in the oil industry, specially for the offshore wells drilling, evaluating and discussing their peculiarities and possible improvement. It was intended to obtain a general overview of risk analysis methodologies, with the objective of verifying the existence of some characteristics that would positively contribute for the knowledge of the inherent risks in the activities of petroleum installations, where this kind of learning is something extremely technically necessary and legally mandatory. (author)

  15. 基于油基钻井液提高钻速的原理与方法%Research on Mechanism and Methods of Improving ROP for Oil-based Drilling Fluid

    Institute of Scientific and Technical Information of China (English)

    王富华; 谭学超; 高鲁军; 王瑞和; 郭保雨

    2012-01-01

    The positive and adverse influences of oil-based drilling fluid on ROP are analyzed with the general equation for drilling rate in terms of the properties of oil-based drilling fluid. It indicates that the formation lithology superior to the well type and drilling fluid exerts the main influence on ROP. The optimum type of drilling bit and optimization of drilling parameters play a more important role in improving ROP than the formulation and performances of drilling fluid. Through regulating the composition of drilling fluid, cleaning bits, alternating wettability of bottom-hole rock, improving the extreme pressure lubricity, adding neutral wetting agent, mixing high temperature stability oil-soluble macromolecule agent to replace organic clay and oxidized asphalt, reducing the contents of micron and submicron particles, modifying shear thinning behavior and increasing efficiency of carrying cuttings to help improving the ROP effectively.%结合通用钻速方程和油基钻井液的特点,分析了油基钻井液对钻速正反两方面的影响,指出了影响机械钻速的主要因素是地层岩石特性,其次是井型和钻井液性能.提高机械钻速的主要途径包括钻头的合理选型、钻进技术参数的合理优化,以及钻井液配方与性能优化.通过调整钻井液配方与性能,使其能够有效清洁钻头、改变井底岩石的润湿性、大幅度提高钻井液的极压润滑性;向钻井液中加入中性润湿剂改变微裂隙表面润湿性;加入抗高温的油溶性高分子增黏提切剂代替有机土、氧化沥青等胶体颗粒,以便降低微米、亚微米颗粒含量,提高剪切稀释性和携岩效率,从而提高机械钻速.

  16. STIMULATION TECHNOLOGIES FOR DEEP WELL COMPLETIONS

    Energy Technology Data Exchange (ETDEWEB)

    Stephen Wolhart

    2003-06-01

    The Department of Energy (DOE) is sponsoring a Deep Trek Program targeted at improving the economics of drilling and completing deep gas wells. Under the DOE program, Pinnacle Technologies is conducting a project to evaluate the stimulation of deep wells. The objective of the project is to assess U.S. deep well drilling & stimulation activity, review rock mechanics & fracture growth in deep, high pressure/temperature wells and evaluate stimulation technology in several key deep plays. Phase 1 was recently completed and consisted of assessing deep gas well drilling activity (1995-2007) and an industry survey on deep gas well stimulation practices by region. Of the 29,000 oil, gas and dry holes drilled in 2002, about 300 were drilled in the deep well; 25% were dry, 50% were high temperature/high pressure completions and 25% were simply deep completions. South Texas has about 30% of these wells, Oklahoma 20%, Gulf of Mexico Shelf 15% and the Gulf Coast about 15%. The Rockies represent only 2% of deep drilling. Of the 60 operators who drill deep and HTHP wells, the top 20 drill almost 80% of the wells. Six operators drill half the U.S. deep wells. Deep drilling peaked at 425 wells in 1998 and fell to 250 in 1999. Drilling is expected to rise through 2004 after which drilling should cycle down as overall drilling declines.

  17. [Pollution hazard for water bodies at oil production].

    Science.gov (United States)

    Zholdakova, Z I; Beliaeva, N I

    2015-01-01

    In the paper there have been summarizes the concepts of the danger of the pollution ofwater bodies in oil production (the most dangerous are reagents used in the drilling, drilling waste, oil and petrochemicals, oil biodestructors. There was shown the danger of the spread of oil pollution. New indices, presenting a hazard during drilling and oil production have been substantiated The tasks aimed to the improvement of the standards and methods of the control of the water pollution by oil, as well as of the documents regulating the conditions of environmental protection during the drilling have been conceived.

  18. Performance analysis of proportional-integral feedback control for the reduction of stick-slip-induced torsional vibrations in oil well drillstrings

    Science.gov (United States)

    Monteiro, Hugo L. S.; Trindade, Marcelo A.

    2017-06-01

    The stick-slip phenomenon, in the process of drilling oil wells, can lead to large fluctuations in drill-bit angular velocity, due to the interaction between drill-bit and rock formation, and, thus, cause irreparable damage to the process. In this work, the performance of control laws applied to the rotary table (responsible for moving the drillstring) is analyzed, in order to reduce stick-slip and drill-bit angular velocity oscillations. The control laws implemented are based on a PI (Proportional-Integral) controller, for which the torque applied to the rotating table has components proportional and integral to the table angular velocity with constant or variable WOB (Weight-On-Bit). For the drillstring, a finite element model with a linear interpolation for the torsional motion was proposed. The torque at drill-bit was modeled considering a non-regularized dry friction model, with parameters that were adjusted using empirical data proposed in literature. Several performance criteria were analyzed and it was observed that a minimization of the mean deviation of the drill-bit angular velocity relative to the target one would provide the best operating condition. Parametric analyses of proportional and integral control gains were performed, yielding level curves for the mean deviation of drill-bit angular velocity. From these curves, stability regions were defined in which the deviation is acceptable. These regions were observed to be wider for smaller values of WOB and higher values of target angular velocity and vice-versa. In addition, the inclusion of a controlled dynamic WOB was proposed leading to reduced levels of mean deviation of angular velocity and, thus, improving stability regions for the drilling process.

  19. State uses of Exxon and Stripper Well oil overcharge funds

    Energy Technology Data Exchange (ETDEWEB)

    Gonzales, H.; Soifer, J.; Janis, L.

    1990-07-01

    Since March of 1986, state governments have received roughly $3.46 billion in funds obtained by the federal government through two major cases, based on price overcharges committed by numerous oil companies during the period of price controls, between 1973 and 1981. Furthermore, about another $1 billion may still be collected from oil companies, with roughly 1/2 to be distributed to the states (and the other 1/2 to the federal government), over the next 5 to 10 years. The role of state government is to allocate the funds, within the specific case guidelines, to new or existing energy programs, in a way which is designed to benefit (or provide restitution to) the class or classes of purchasers who bore the burden of the overcharges. This report incorporates information collected by NCLC through telephone surveys conducted during July, 1990. The information we collected on the status and state uses of both Exxon and Stripper Well funds is contained in the state-by-state narrative summary section and in a series of tables at the end of the report. Each of the quarterly reports tracks final state decisions allocating use of these funds. The terms allocated'' and designated'' are used interchangeably throughout the document to mean that final state decisions have been made regarding these funds. Tracking state allocations about these funds is the only practical way for us to provide an overview of the actual status of state processes or decisions which have occurred with regard to this money. 8 tabs.

  20. 30 CFR 250.455 - What are the general requirements for a drilling fluid program?

    Science.gov (United States)

    2010-07-01

    ... well control. This program must address drilling fluid safe practices, testing and monitoring equipment... drilling fluid program? 250.455 Section 250.455 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil...

  1. 30 CFR 250.424 - What are the requirements for prolonged drilling operations?

    Science.gov (United States)

    2010-07-01

    ... the prolonged operations on continued drilling operations and the life of the well. At a minimum, you... drilling operations? 250.424 Section 250.424 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and...

  2. Development of drilling fluids based on polysaccharides and natural minerals

    OpenAIRE

    Zhanar Nurakhmetova; Iskander Gussenov; Vladimir Sigitov; Sarkyt Kudaibergenov

    2016-01-01

    The technology of oil well drilling in complex geological conditions by applying the drilling muds based on the polysaccharides – gellan, xanthan and their mixture which potentially possess a good flocculation properties and the ability to reversible sol-gel transition in dependence of temperature and concentration of low molecular weight cations in water has been justified in this work. For the preparation of drilling muds, gellan and xanthan were used, these polymers were obtained from b...

  3. DALI - drilling advisor with logic interpretations: methodological issues for designing underbalanced drilling operations. Improving efficiency using case-based reasonic

    Energy Technology Data Exchange (ETDEWEB)

    Santana, Gustavo A.; Velazquez C, David [Mexican Oil Institute, Mexico DF (Mexico)

    2004-07-01

    A system that applies a method of knowledge-intensive case-based reasoning, for repair and prevention of unwanted events in the domain of offshore oil well drilling, has been developed in cooperation with an oil company. From several reoccurring problems during oil well drilling the problem of 'lost circulation', i.e. loss of circulating drilling fluid into the geological formation, was picked out as a pilot problem. An extensive general knowledge model was developed for the domain of oil well drilling. Different cases were created on the basis of information from one Mexican Gulf operator. When the completed CBR-system was tested against a new case, cases with descending similarity were selected by the tool. In an informal evaluation, the two best fitting cases proved to give the operator valuable advise on how to go about solving the new case (author)

  4. Addendum 2: Logs of monitor wells drilled May 1988 through December 1992

    Energy Technology Data Exchange (ETDEWEB)

    Stout, J. [Ray Raskin Associates Inc., Tempe, AZ (United States); Qualheim, B. [Lawrence Livermore National Lab., CA (United States); McPherrin, R. [Lawrence Livermore National Lab., CA (United States); Barber, K. [Allied Signal Technical Services, Livermore, CA (United States); Hedegaard, R. [ICF Kaiser Engineers, San Francisco, CA (United States); McConihe, W.; Miller, T. [Brown and Caldwell, Pleasanton, CA (United States)

    1993-11-01

    The logs in this addendum were plotted in a new format by the same software package (LOGGER by Rockware, Denver, CO) that was used in the original publication. The scale remains the same, 1 inch = 15 foot. The header is totally automated with a subheading indexing the well-construction symbols. Geophysical curves are labeled in their respective channels, and percentage core recovery is plotted in a histogram. Lithologic symbols are plotted to scale in a channel similar to previous logs. The lithologic description also has been automated to assure consistency in terminology. Descriptions are more extensive and are referenced by leader lines to the lithologic symbol. Additional figures included for this Addendum are: a plot of all the monitoring well locations at the LLNL Main site and a plot detailing the gasoline spill area well locations in the vicinity of Building 403.

  5. Environment-friendly drilling operation technology

    Science.gov (United States)

    Luo, Huaidong; Jing, Ning; Zhang, Yanna; Huang, Hongjun; Wei, Jun

    2017-01-01

    Under the circumstance that international safety and environmental standards being more and more stringent, drilling engineering is facing unprecedented challenges, the extensive traditional process flow is no longer accepted, the new safe and environment-friendly process is more suitable to the healthy development of the industry. In 2015, CNPCIC adopted environment-friendly drilling technology for the first time in the Chad region, ensured the safety of well control, at the same time increased the environmental protection measure, reduced the risk of environmental pollution what obtain the ratification from local government. This technology carries out recovery and disposal of crude oil, cuttings and mud without falling on the ground. The final products are used in road and well site construction, which realizes the reutilization of drilling waste, reduces the operating cost, and provides a strong technical support for cost-cutting and performance-increase of drilling engineering under low oil price.

  6. Impact of oil-based drill mud disposal on benthic foraminiferal assemblages on the continental margin off Angola

    Science.gov (United States)

    Jorissen, F. J.; Bicchi, E.; Duchemin, G.; Durrieu, J.; Galgani, F.; Cazes, L.; Gaultier, M.; Camps, R.

    2009-12-01

    In order to assess the possible environmental impact of oily cuttings discharged during oil exploration activities, we studied the benthic foraminiferal faunas in a five-station, 4-km-long sampling transect around a cuttings disposal site at about 670 m depth offshore Angola (W Africa), where drilling activities started 1.5 years before sampling. Living (Rose Bengal stained) and dead foraminiferal faunas were sampled in March 2006. The faunal patterns mirror the spatial distribution of hydrocarbons, which are dispersed into a southeastern direction. Four different areas can be distinguished on the basis of the investigated faunal parameters (density, diversity and species composition of the living fauna, and comparison with subrecent dead faunas). The fauna at station S31, 300 m SE of the oil cuttings disposal site, appears to be clearly impacted: the faunal density and diversity are maximal, but evenness is minimal. Taxa sensitive to organic enrichment, such as Uvigerina peregrina, Cancris auriculus and Cribrostomoides subglobosus, have largely disappeared, whereas the low-oxygen-resistant taxon Chilostomella oolina and opportunistic buliminids and bolivinids attain relatively high densities. At station S32, 500 m SE of the disposal site, environmental impact is still perceptible. The faunal density is slightly increased, and U. peregrina, apparently the most sensitive species, is still almost absent. The faunas found at 1 and 1.8 km SE of the disposal site are apparently no longer impacted by the drill mud disposal. Faunal density and diversity are low, and the faunal composition is typical for a mesotrophic to eutrophic upper slope environment. Finally, Station S35, 2 km NW of the disposal site, contains an intermediate fauna, where both the low-oxygen-resistant C. oolina and the more sensitive taxa ( U. peregrina, C. auriculus and C. subglobosus) are present. All taxa live close to the sediment-water interface here, indicating a reduced oxygen penetration into

  7. Well Spacing for Horizontal Wells

    Directory of Open Access Journals (Sweden)

    C.D.S. Keuengoua

    2011-06-01

    Full Text Available In the developing phase of a hydrocarbon reservoir and planning for drilling the production wells, it is necessary to drill the wells in an appropriate spacing to achieve maximum economic revenues during the reservoir life span. Well spacing which is the real location and interrelationship between producing oil or gas wells in an oil field is an important parameter. It is determined for the maximum ultimate production of a given reservoir and should be taken in consideration during well planning to avoid drilling of unnecessary wells. This study presents the concept of drainage area on horizontal well and horizontal productivity indices with different equations and their applications. A user friendly Excel Spreadsheet program was developed to calculate the productivity values of horizontal wells using three major available productivity equations. Also, the developed spreadsheet program was used to evaluate the effect of well spacing on the productivities of horizontal wells using productivity index approach and drainage area concept. It also helps to review the comparison between vertical and horizontal wells spacing based on drainage area concept. This program was validated, and then was used to study the effect of horizontal well length on the ratio of horizontal well productivity to vertical well productivity. The results show that higher ratio of horizontal well productivity to vertical well productivity values are obtained with increase length of the horizontal well. It is a very useful tool for making decision about the application of well spacing for horizontal wells.

  8. Wellbore Surveying While Drilling Based on Kalman Filtering

    Directory of Open Access Journals (Sweden)

    Mahmoud ElGizawy

    2010-01-01

    Full Text Available Problem statement: Oil and gas are global fuels obtained primarily from drilling wells in underground terrestrial reservoirs. Vertical drilling is preferred because of its simplicity and therefore low cost, but subsurface targets can often be procured only by directing the wellbore along predefined non-vertical trajectories. For instance, directional drilling must be employed to reach locations inaccessible to the drilling rig, to side track an existing well (multilateral drilling, or to drill multiple wells from the same offshore platform (horizontal drilling. Approach: A complete knowledge of the wellbore direction and orientation during the drilling process is essential to guarantee proper directional drilling procedure. Results: Thus, besides the conventional drilling assembly, directional drilling operations require sensors to provide azimuth, inclination and toolface angles of the drill. These sensors are part of the Measurement-While-Drilling (MWD tool, which in current technology is installed several feet behind the drill bit. In such systems, values for inclination and toolface angles are determined from accelerometer measurements at predetermined stationary surveying stations; these values are then incorporated with magnetometer measurements to deliver the azimuth angle. Values for inclination and azimuth angles at the current surveying station are combined with those from the previous station to compute the position of the probe. However, there is no accurate information about the wellbore trajectory between survey stations. Additionally, the magnetic field of the magnetometers has deleterious effect on the overall accuracy of surveying measurements. Conclusion: A method to provide continuous information about the wellbore trajectory has been developed in this study. The module developed integrates a Rotary Steerable System (RSS and MWD tool into one drilling probe utilizing Inertial Navigation System (INS technology. This is achieved

  9. Near Well Simulation of Extra-Heavy Oil Production Using SAGD

    OpenAIRE

    Kou, Guandong; Halvorsen, Britt

    2015-01-01

    Heavy oil and bitumen represent a massive world resource more than twice the size of global reserves of light or conventional oil. In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the oil viscosity, in order to extract the oil. Steam-Assisted Gravity Drainage (SAGD) is a thermal method where continuous steam injection is used. In this method, two horizontal wells are placed in parallel. Different types of inflow control technologies are developed to increase ...

  10. A new anti-slough drilling fluid study and application

    Science.gov (United States)

    Zhao, X. Y.; Meng, Y. F.; Hou, X. T.; Xiao, C.; Li, G.; Niu, C. C.

    2016-08-01

    Currently the BIOCAT drilling fluid system adopted in oil field results in wellbore collapsing frequently, borehole enlargement rate over 100%. In order to settle these problems, the Impermeable anti-collapsing inhibitive Polymer Drilling Fluids System is developed by optimizing the inhibitors with high anti-collapsing inhibitive instead of BIOCAT inhibitor, adding impermeable agent SMT3, sealing materials such as graphite, calcium carbonate, etc. Laboratory experiments results show that the developed drilling fluid system has stronger inhibitive and anti-collapse capacity. The swelling increment decreases by over 10% and recovery rate increases by 60%-70%, also, it can efficiently prolong the borehole wall stable period by over 100%. 24 wells applications with the Impermeable anti-collapsing inhibitive Polymer Drilling Fluids System achieved good results, comparing to adjacent wells with BIOCAT drilling fluid system, wellbore collapsing decreasing significantly and borehole diameter enlargement of unstable hole section in wells decreased from 100% to 10%, well drilling time decreased by 15%, drilling cost decreased by 10%. It shows that the developed Impermeable anti-collapsing inhibitive Polymer Drilling Fluids System KPAM-NH4PAN can provide strong and long-term inhibition, close to oil-based drilling fluid. so it is suggested that it be used in subsequent drilling operations to enhance the wellbore stability in an oilfield.

  11. 巴什托油气田高密度钻井液技术研究%Application of high density drilling fluid technique in Bashituo oil & gas field

    Institute of Scientific and Technical Information of China (English)

    常连玉

    2011-01-01

    为解决巴什托油气田在钻井过程中存在的盐膏侵严重、井壁失稳、井底温度高、存在高压层、易漏失等一系列难题,通过优选膨润土加量、抗高温处理剂、加重剂等,开发出一套适合巴什托地区的高密度钻井液体系.该体系密度达到2.20 g/cm',抗温可达160 9C,具有良好的热稳定性、抑制性能和抗污染能力.在BK8H井进行了现场应用,施工过程中钻井液性能良好,未发生任何井下事故和井下复杂情况,顺利钻穿440 m的盐膏层,三开井径扩大率为2.33%,而且与该区同类型井相比缩短了钻井周期,表明该高密度钻井液体系完全适应巴什托区块复杂条件下的钻井要求.%formation intruded seriously by salt bed, wellbore instability, high temperature in downhole, within high pressure layers and leakage were all made the drilling difficult in Bashituo oil & gas field. A set of high density drilling fluid suitable for this area was developed to settle the problem by optimizing the bentonite concentration, High temperature resisting additive agent and weighting agent.The density of this system can reach up to 2.20 gram per centimeter while temperature can get as high as 160 degree. The drilling fluid was used in field experiment in Well BK8H and has gained well results due to thermal stability, inhibitive character and resisting pollution. During the treatment in Well BK8H, the fluid system performed well, no accident and other complex situation happened downhole.Due to this, salt bed with 400 meters was drilled though smoothly, and the enlargement rate of re-drilling well was 2.33percent, besides,the drilling cycle of this well was shorter than that of the similar well in the same area. A11 these illustrates that the high density drilling fluid system meet the drilling requirement under complex conditions in Bashituo blocks.

  12. Hydrothermal alteration in the Reykjanes geothermal system: Insights from Iceland deep drilling program well RN-17

    Science.gov (United States)

    Marks, Naomi; Schiffman, Peter; Zierenberg, Robert A.; Franzson, Hjalti; Fridleifsson, Gudmundur Ó.

    2010-01-01

    The Reykjanes geothermal system is a seawater-recharged hydrothermal system that appears to be analogous to seafloor hydrothermal systems in terms of host rock type and low water/rock alteration. The similarities make the Reykjanes system a useful proxy for seafloor vents. At some time during the Pleistocene, the system was dominated by meteoric water recharge, and fluid composition at Reykjanes has evolved through time as a result of changing proportions of meteoric water influx as well as differing pressure and temperature conditions. The purpose of this study is to characterize secondary mineralization, degree of metasomatic alteration, and bulk composition of cuttings from well RN-17 from the Reykjanes geothermal system. The basaltic host rock includes hyaloclastite, breccia, tuff, extrusive basalt, diabase, as well as a marine sedimentary sequence. The progressive hydrothermal alteration sequence observed with increasing depth results from reaction of geothermal fluids with the basaltic host rock. An assemblage of greenschist facies alteration minerals, including actinolite, prehnite, epidote and garnet, occurs at depths as shallow as 350 m; these minerals are commonly found in Icelandic geothermal systems at temperatures above 250 °C (Bird and Spieler, 2004). This requires hydrostatic pressures that exceed the present-day depth to boiling point curve, and therefore must record alteration at higher fluid pressures, perhaps as a result of Pleistocene glaciation. Major, minor, and trace element profiles of the cuttings indicate transitional MORB to OIB composition with limited metasomatic shifts in easily mobilized elements. Changes in MgO, K 2O and loss on ignition indicate that metasomatism is strongly correlated with protolith properties. The textures of alteration minerals reveal alteration style to be strongly dependent on protolith as well. Hyaloclastites are intensely altered with calc-silicate alteration assemblages comprising calcic hydrothermal

  13. Sedimentary petrology of oil well rock cores; Petrologia sedimentaria de nucleos de rocas de pozos petroleros

    Energy Technology Data Exchange (ETDEWEB)

    Izquierdo M, Georgina; Paredes S, Adriana [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2001-07-01

    At the request of PEMEX Exploration and Production (PEP), in the area of Geology of the Gerencia de Geotermia, the necessary methodology has been integrated to carry out the geologic characterization of cores obtained during the oil well drilling. The integrated studies have been of utility for PEMEX, because they provide detailed information on the processes, conditions of deposition and diagenesis that occur in sedimentary rocks. On the other hand, this geologic information contributes to the update of the geologic model of the field in study. [Spanish] A solicitud de PEMEX Exploracion y Produccion (PEP), en el area de Geologia de la Gerencia de Geotermia, se ha integrado la metodologia necesaria para llevar a cabo la caracterizacion geologica de nucleos obtenidos durante la perforacion de pozos petroleros. Los estudios integrados han sido de utilidad para PEMEX, pues proporcionan informacion detallada sobre los procesos, condiciones de depositacion y diagenesis que ocurren en rocas sedimentarias. Por otro lado, esta informacion geologica contribuye a la actualizacion del modelo geologico del campo en estudio.

  14. Study on Coalmine Large Diameter Engineering Well Drilling%煤矿大口径工程井钻井技术研究

    Institute of Scientific and Technical Information of China (English)

    周兢

    2016-01-01

    煤矿大口径工程井要求井斜小、直径大,其钻井方法可分为反井钻井法和常规钻井法。反井钻井法虽然钻进效率高但对施工设备和工程条件要求苛刻,而常规钻井法集定向钻进、气动潜孔锤钻进、分级扩孔等技术为一体,具有适用范围广、施工成本低等特点。利用常规钻井法施工煤矿大口径工程井存在着扩孔钻头机械破岩能量不足和钻井液携岩能力弱等问题,提出通过加大钻机扭矩、优化扩孔分级方案以及采用气举反循环钻进工艺来解决上述问题,而且给出了采用气举反循环工艺施工典型煤矿大口径工程井的主要设备配置方案。%The coalmine large diameter engineering well requires small deviation and large diameter. The drilling method can be divid⁃ed into raise boring drilling and conventional drilling. The raise boring drilling although has high efficiency, but harsh demands on con⁃struction equipment and engineering specifications. While the conventional drilling has set directional drilling, pneumatic DTH drill⁃ing, graded reaming into one, thus wide range of application and low construction cost. Moreover, the paper has pointed out issues of conventional drilling have insufficient reamer bit mechanical rock breaking energy, weaker drilling fluid carrying capacity etc. Thus drill torque increasing, reaming graded scheme optimizing and air-lift reverse circulation drilling using put forward to solve above is⁃sues;also main equipment configuration scheme for air-lift reverse circulation drilling to construct typical coalmine large diameter en⁃gineering well provided.

  15. 30 CFR 203.30 - Which leases are eligible for royalty relief as a result of drilling a phase 2 or phase 3 ultra...

    Science.gov (United States)

    2010-07-01

    ... ROYALTY RATES OCS Oil, Gas, and Sulfur General Royalty Relief for Drilling Ultra-Deep Wells on Leases Not... a result of drilling a phase 2 or phase 3 ultra-deep well? 203.30 Section 203.30 Mineral Resources... drilling a phase 2 or phase 3 ultra-deep well? Your lease may receive a royalty suspension volume...

  16. The research and practice of boosting oil production by duplicated horizontal wells in thick super heavy oil reservoir

    Energy Technology Data Exchange (ETDEWEB)

    Peiwu, Li; Yang Jing, Wangping; Ping, Yuan [Exploration and Development Research Institute of Liaohe Oilfield Company, PetroChina, P.R.China , 124010 (China)

    2011-07-01

    In the oil industry, the extraction of heavy oil and super heavy oil from reservoirs is difficult and production decline and sand production are some of the numerous challenges it faces. The aim of this paper is to show how secondary development can address these issues. A preliminary study was conducted and then a plan of secondary development was applied to M6 Block which is a massive extra-ultra heavy oil reservoir. The plan included 154 wells with 30 new horizontal wells. Results proved SAGD to be a good technique for high oil recovery results with improved production from M6 Block. After the implementation of the secondary development, oil recovery improved by 36.3%. This technique also solved the sand production problem. This study showed that secondary development can be a solution to obtain a better performance from heavy oil reservoirs and provides guidance to other similar reservoir.

  17. WETTABILITY AND PREDICTION OF OIL RECOVERY FROM RESERVOIRS DEVELOPED WITH MODERN DRILLING AND COMPLETION FLUIDS

    Energy Technology Data Exchange (ETDEWEB)

    Jill S. Buckley; Norman R. Morrow

    2003-05-01

    This report summarizes the experimental results of some baseline imbibition tests on recovery of mineral oil at very strongly water wet conditions (VSWW) from sandstones with air permeability ranging from 80 to 360 md. Mixed wettability cores were prepared by adsorption from either Minnelusa or Gullfaks crude oil using either synthetic Minnelusa reservoir brine or sea water. Recovery of two synthetic-based mud (SBM) base oils, Petrofree(reg sign)SF and LVT 200 from mixed wettability cores gave results that correlated closely with results for refined oils with viscosities ranging from 3.8 to 84 cp. Two synthetic-based mud emulsifiers (LE SUPERMUL and EZ MUL(reg sign)NT) were added to mineral oil and tested for their effect on the wettability of MXW-F core samples as indicated by spontaneous imbibition. In both cases a significant decrease in water wetness was obtained.

  18. Oil and Gas Well locations, Upper Colorado River Basin, 2007

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Federal onshore lands contain an estimated 20 percent of the oil and 25 percent of the undiscovered natural gas resources in the United States (U.S. Bureau of Land...

  19. CASING DRILLING TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Nediljka Gaurina-Međimurec

    2005-12-01

    Full Text Available Casing drilling is an alternative option to conventional drilling and uses standard oilfield casing instead of drillstring. This technology is one of the greatest developments in drilling operations. Casing drilling involves drilling and casing a well simultaneously. In casing driling process, downhole tools can be retrieved, through the casing on wire-line, meaning tool recovery or replacement of tools can take minutes versus hours under conventional methods. This process employs wireline-retrievable tools and a drill-lock assembly, permitting bit and BHA changes, coring, electrical logging and even directional or horizontal drilling. Once the casing point is reached, the casing is cemented in place without tripping pipe.

  20. CASING DRILLING TECHNOLOGY

    OpenAIRE

    Nediljka Gaurina-Međimurec

    2005-01-01

    Casing drilling is an alternative option to conventional drilling and uses standard oilfield casing instead of drillstring. This technology is one of the greatest developments in drilling operations. Casing drilling involves drilling and casing a well simultaneously. In casing driling process, downhole tools can be retrieved, through the casing on wire-line, meaning tool recovery or replacement of tools can take minutes versus hours under conventional methods. This process employs wireline-re...

  1. Gas Well Top Hole Locations, LP and LNG - MO 2012 State Permitted Oil and Gas Wells (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This data set contains permitted oil and gas wells within the State of Missouri that are not protected under confidentiality rules. Production numbers have been...

  2. 加拿大非常规油气田优快钻井技术%Optimized fast drilling technology for unconventional oil/gas ifeld in Canada

    Institute of Scientific and Technical Information of China (English)

    侯立中; 郑德帅; 吴俊霞

    2014-01-01

    Due to high cost of unconventional oil/gas ifelds development like tight gas, it is in urgent need to study optimized fast drilling in order to reduce drilling costs. The development of unconventional oil and gas needs to place long horizontal sectionin in the reservoir. In view of the technical challenges like dififculty in control of wellbore trajectory in long horizontal section and low penetra-tion rate, the mechanical properties of bottomhole assembly was analyzed and optimized through computation, and the compound drill-ing rate in the horizontal section was improved, all of which reduced the number of trips in combination with bit selection. The drillstring oscillator was used to improve wob transferring efifciency;oil-based drilling lfuid was specially prepared for horizontal section, which greatly reduced the friction factor and effectively inhibited wellbore instability. The application of optimized fast drilling technology in Daylight Unconventional Oil/Gas Field (Canada) shows that this technology signiifcantly reduces drilling period and drilling costs, and provides useful reference for high-efifcient development of domestic unconventional oil/gas ifelds.%由于致密气等非常规油气田开发成本高,迫切需要进行优快钻井研究降低钻井成本。非常规油气开发需要在储层内布置长水平井段,针对长水平井段井眼轨迹控制困难、机械钻速低的技术难题,通过计算,分析了底部钻具组合力学特性,优化了底部钻具组合,提高水平段复合钻进比例,配合钻头选型,减少了起下钻次数;采用钻柱振荡器提高钻压传递效率,针对水平井段优化配置油基钻井液体系,大幅度降低了摩擦因数,又抑制了井壁失稳。加拿大daylight非常规油气田应用结果表明,应用优快钻井技术大幅度降低了钻井周期和成本,为国内非常规油气田高效开发提供了借鉴。

  3. High performance nature of biodegradable polymeric nanocomposites for oil-well drilling fluids

    OpenAIRE

    Tarek M. Madkour; Samar Fadl; M.M. Dardir; Mohamed A. Mekewi

    2016-01-01

    Multi-walled carbon nanotube (MWCNT) and graphene nanoplatelet reinforced thermoplastic poly(lactic acid) (PLA) biodegradable nanocomposites were designed and prepared using solution casting techniques. The prepared biodegradable polymers are expected to provide an environmentally friendly alternative to petroleum-based polymers. Both nanocomposite systems exhibited better thermal stability and improved mechanical performance over the unreinforced polymer exhibiting excellent strength and deg...

  4. Investigation of drilling failure of Well A1, E-Field, onshore Niger Delta, Nigeria, using 3-D seismic data

    Science.gov (United States)

    Akinmosin, A.; Oladele, S.; Oriade, O. F.

    2016-02-01

    This study aimed at investigating reasons for failure of Well A1 that is surrounded by hydrocarbon discoveries in onshore Niger delta with a view to propose optimal location for a new well through interpretation of new 3-D seismic data. Sands encountered by Well A1 were delineated and tied to seismic. Structural closure was mapped and reservoirs at various depths were stacked and sectioned. Porosity, Net to Gross, and Gross Rock Volume of the reservoirs were computed. Well A1 was correlated to a nearby Well K4 and a good correlation was observed. A fault assisted multi reservoirs Prospect-E with south-westerly shift with depth was delineated on the hanging wall of structure building E-Fault whose closing contours is expected to trap hydrocarbon. Petrophysical properties of the reservoirs range from fair to good. Well A1 either perforated prospect-E beneath the oil water contact, completely missed prospect-E or punctured the wet foot wall of E-fault. Consequently, Well A1 could not impact the objective sands and only able to produce water. Well A1 failed because of wrong surface positioning which unsuccessfully targeted the shifting reservoirs. A successful exploratory well in E-Field would be a gently south-westerly deviated well whose vertical section would encounter the shallower sands and deviated section targeting the deeper sands with surface location at about 1 km southeast of Well A1.

  5. Automatic evaluation procedure for the drilling of an offshore well; Procedimiento de evaluacion automatica de la perforacion de un pozo marino

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz, B. [Petroleos Mexicanos (PEMEX) (Mexico); Martinez, J. [Instituto Mexicano de Petroleo, Mexico City (Mexico)

    1996-12-31

    This paper presents a methodology to the evaluation of well drilling in the marine zone of Mexico, which can be applied to any kind of well in any region and any kind of international contract. This procedure is an automatic process and can reduce human errors. 2 refs., 11 tabs.

  6. A device for separating and detecting drilling fluid oil and gas based on semi-permeable membrane%基于半透膜的钻井液油气分离检测技术

    Institute of Scientific and Technical Information of China (English)

    李三国; 谢关宝

    2013-01-01

    During drilling, oil and gas detection of mud logging from drilling fluids is one of the important means of discovering and evaluating oil and gas layer. The oil and gas component information quantitatively got is the basis to evaluate the reservoir and oil and gas characters. At present, the detected hydrocarbon components in mud logging gas measurement technology are obtained from the electricdegasser, which is affected by the drilling fluid temperature, liquid level and viscosity, and only less oil and gas quantitative informationed obtained. It affects the accuracy of interpretation and evaluation of oil and gas. semi-permeable membrane has the characteristics of the selective separation of oil and gas, hydrocarbon components can be directly obtained from the drilling fluid, and can provide a quantitative basis for oil and gas interpretation and evaluation. Through the studies of semi-permeable membrane and oil and gas separation technology, we produce the oil and gas separator on the basis of those. After such tests as stability and sensitivity, high temperature and resisting impact in lab, and experimentation at well site. It conclued that the drilling fluid oil and gas separator of semi-permeable membrane can be used to detect oil and gas, expand the content of hydrocarbon detection and enrich the information of hydrocarbon reservoir evaluation.%在钻井过程中,录井对钻井液油气的检测是发现和评价油气层重要手段之一,定量获取油气组分信息是有效评价油气层和油气性质的基础.目前录井气测技术所检测的烃组分通常由电动脱气器获得,受钻井液温度、液面高度和黏度的影响较大,所获得的油气定量信息较少,影响了油气解释与评价的准确性.半透膜对油气具有选择性分离的特性,能直接从钻井液中获取烃类组分,能够为油气解释与评价提供定量的基础信息.通过对半透膜和气体分离技术的研究,制备适合现场油气分离要

  7. Acoustic Energy: An Innovative Technology for Stimulating Oil Wells

    Energy Technology Data Exchange (ETDEWEB)

    Edgar, Dorland E.; Peters, Robert W.; Johnson, Donald O.; Paulsen, P. David; Roberts, Wayne

    2006-04-30

    The objective of this investigation was to demonstrate the effectiveness of sonication in reducing the viscosity of heavy crude oils. Sonication is the use of acoustic or sound energy to produce physical and/or chemical changes in materials, usually fluids. The goal of the first project phase was to demonstrate a proof of concept for the project objective. Batch tests of three commercially available, single-weight oils (30-, 90-, and 120-wt) were performed in the laboratory. Several observations and conclusions were made from this series of experiments. These include the following: (1) In general, the lower the acoustic frequency, the greater the efficiency in reducing the viscosity of the oils; (2) Sonication treatment of the three oils resulted in reductions in viscosity that ranged from a low of 31% to a high of 75%; and (3) The results of the first phase of the project successfully demonstrated that sonication could reduce the viscosity of oils of differing viscosity. The goal of the second project phase was to demonstrate the ability of sonication to reduce the viscosity of three crude oils ranging from a light crude to a heavy crude. The experiments also were designed to examine the benefits of two proprietary chemical additives used in conjunction with sonication. Acoustic frequencies ranging from 800 Hz to 1.6 kHz were used in these tests, and a reactor chamber was designed for flow-through operation with a capacity of one gallon (3.8 liters). The three crude oils selected for use in the testing program were: (1) a heavy crude from California with a viscosity of approximately 65,000 cP (API gravity about 12{sup o}), (2) a crude from Alabama with a significant water content and a viscosity of approximately 6,000 cP (API gravity about 22 {sup o}), and (3) a light crude from the Middle East with a viscosity of approximately 700 cP (API gravity about 32{sup o}). The principal conclusions derived from the second project phase include the following: (1) The

  8. Acoustic Energy: An Innovative Technology for Stimulating Oil Wells

    Energy Technology Data Exchange (ETDEWEB)

    Edgar, Dorland E.; Peters, Robert W.; Johnson, Donald O.; Paulsen, P. David; Roberts, Wayne

    2006-04-30

    The objective of this investigation was to demonstrate the effectiveness of sonication in reducing the viscosity of heavy crude oils. Sonication is the use of acoustic or sound energy to produce physical and/or chemical changes in materials, usually fluids. The goal of the first project phase was to demonstrate a proof of concept for the project objective. Batch tests of three commercially available, single-weight oils (30-, 90-, and 120-wt) were performed in the laboratory. Several observations and conclusions were made from this series of experiments. These include the following: (1) In general, the lower the acoustic frequency, the greater the efficiency in reducing the viscosity of the oils; (2) Sonication treatment of the three oils resulted in reductions in viscosity that ranged from a low of 31% to a high of 75%; and (3) The results of the first phase of the project successfully demonstrated that sonication could reduce the viscosity of oils of differing viscosity. The goal of the second project phase was to demonstrate the ability of sonication to reduce the viscosity of three crude oils ranging from a light crude to a heavy crude. The experiments also were designed to examine the benefits of two proprietary chemical additives used in conjunction with sonication. Acoustic frequencies ranging from 800 Hz to 1.6 kHz were used in these tests, and a reactor chamber was designed for flow-through operation with a capacity of one gallon (3.8 liters). The three crude oils selected for use in the testing program were: (1) a heavy crude from California with a viscosity of approximately 65,000 cP (API gravity about 12{sup o}), (2) a crude from Alabama with a significant water content and a viscosity of approximately 6,000 cP (API gravity about 22 {sup o}), and (3) a light crude from the Middle East with a viscosity of approximately 700 cP (API gravity about 32{sup o}). The principal conclusions derived from the second project phase include the following: (1) The

  9. Study and Application of Case Overshot for Sidetrack Drilling Horizontal Well Technology%套管开窗侧钻水平井技术的研究与应用

    Institute of Scientific and Technical Information of China (English)

    程安新

    2011-01-01

    The application of case overshot for sidetrack drilling horizontal welltechnology in overall managing casing damage wells and tapping the potential remainingoil in the maturing oilfield has got obvious effects on opening up the oilstorage in uncontrolled areas and residual oil in dead space, while itsapplication inless permeable and thin oil paylayer may increase single well production and recovery. To guaranteetechnology effects of sidetrack horizontal well requires making a careful studyof geological condition about oil wells and deciding a sound operational planand a proper well completion pattern to fully meet the demand for later perioddevelopment operation.%套管开窗侧钻水平井技术应用于老油田套损井综合治理和老区剩余油挖潜改造,对开发未受控面积内的储油和死角残余油效果明显;应用于低渗透、薄油层,可有效提高单井产量和采收率。要保证侧钻水平井的工艺效果,必须仔细研究油井地质状况,制定完善的施工方案和适宜的完井方式,使之充分满足后期开发作业的要求。

  10. FOR-1: zapping worn-out wells for left-behind oil

    Energy Technology Data Exchange (ETDEWEB)

    Zimmerman, M.D.

    1980-09-25

    This review of enhanced oil recovery predicts oil extracted from old wells will provide over 50% of the US crude production by 1995. Economic incentives and new regulations are encouraging industry's commercialization of enhanced oil recovery techniques. Fire recovery techniques are diagrammed and described: steam blasting, waterflooding, underground burning, chemical altering, and gas mixing. A major breakthrough is the development of a multi-solid, fluidized-bed combustion system for oil-field steam generators.

  11. Optimization of perforated completions for horizontal wells in a high-permeability, thin oil zone : case study : Hassi R'mel oil rim, Algeria

    Energy Technology Data Exchange (ETDEWEB)

    Bourenane, M.; Recham, R. [Sonatrach Production PED, Hydra (Algeria); Tiab, D. [Oklahoma Univ., Norman, OK (United States)

    2004-07-01

    The efficiency and economics of horizontal wells has increased significantly in the past twenty years due to advances in drilling and completion technologies. State of the art applications require even better completion designs to optimize production, and ultimate recoverable reserves. Perforation is a common well completion method whose performance depends on the perforation length and its distribution along the horizontal well, perforation density, phasing, depth of penetration and diameter of the individual perforations. This study examined how reservoir heterogeneity and coning problems influence the performance of perforated completions for horizontal wells. Eight horizontal wells from the Hassi R'mel oil rim in Algeria were subjected to a petrophysical evaluation. A numerical solution was developed to optimize the perforated completion wells in heterogeneous reservoirs with large gas caps and an active aquifer. The most relevant reservoir parameters were examined through a sensitivity analysis. In particular, the performance of the HRZ-09 well was simulated because it was completed non-conventionally using an inverted high angle technique. Therefore, it was possible to study the effect of perforating the slated section of the well. The study showed that no extra recovery should be expected from the double perforation of this well. 22 refs., 3 tabs., 17 figs.

  12. First evaluation of foraminiferal metabarcoding for monitoring environmental impact from an offshore oil drilling site

    KAUST Repository

    Laroche, Olivier

    2016-08-29

    At present, environmental impacts from offshore oil and gas activities are partly determined by measuring changes in macrofauna diversity. Morphological identification of macrofauna is time-consuming, expensive and dependent on taxonomic expertise. In this study, we evaluated the applicability of using foraminiferal-specific metabarcoding for routine monitoring. Sediment samples were collected along distance gradients from two oil platforms off Taranaki (New Zealand) and their physicochemical properties, foraminiferal environmental DNA/RNA, and macrofaunal composition analyzed. Macrofaunal and foraminiferal assemblages showed similar shifts along impact gradients, but responded differently to environmental perturbations. Macrofauna were affected by hypoxia, whereas sediment grain size appeared to drive shifts in foraminifera. We identified eight foraminiferal molecular operational taxonomic units that have potential to be used as bioindicator taxa. Our results show that metabarcoding represents an effective tool for assessing foraminiferal communities near offshore oil and gas platforms, and that it can be used to complement current monitoring techniques. (C) 2016 Elsevier Ltd. All rights reserved.

  13. NAFTA opportunities: Oil and gas field drilling machinery and services sector

    Energy Technology Data Exchange (ETDEWEB)

    1993-01-01

    The North American Free Trade Agreement (NAFTA) significantly improves market access in Mexico and Canada for U.S. exports of oil and gas field equipment. Foreign markets account for more than 80 percent of U.S. shipments of oil and gas field machinery. Foreign markets are expected to continue their importance to this industry, in the long term. Mexico and Canada are moderate-sized markets for U.S. exports of oilfield products. In 1992, U.S. exports of this equipment amounted to about $113 million to Mexico and $11 million to Canada.

  14. Drilling lfuid design and test method for offshore ultra-HTHP wells and new drilling lfuid technology abroad%海洋超高温高压井钻井液设计与测试方法及国外钻井液新技术

    Institute of Scientific and Technical Information of China (English)

    刘晓栋; 朱红卫; 高永会

    2014-01-01

    介绍了国外高温高压井的最新定义和分级,以及全球海上高温高压井的分布。阐述了海洋高温高压井钻井液性能设计方法,主要包括密度、高温热稳定时间、抗高温能力、高温高压滤失量、抗污染能力、低温流变性能和水合物抑制能力等,提出高温热稳定时间、抗高温能力、高温高压滤失量应为高温高压井钻井液3个关键性能设计及评价指标,建立利用极高温高压流变仪Chandler 7600模拟高温高压井钻井液静态高温热稳定时间和动态循环抗高温能力的评价方法。详细介绍了国外抗232℃超高温无铬环境友好型水基钻井液、抗220℃超高温高密度甲酸铯钻井液、抗180℃高温无黏土储层钻井液、抗260℃超高温油基钻井液、抗315℃极高温氟基逆乳化钻井液。上述技术对中国超高温乃至极高温钻井液技术的研究具有一定的借鉴意义。%This paper presents the latest deifnition and classiifcation of HTHP wells in abroad and the distribution of HTHP wells offshore in the world;sets forth the design method for drilling lfuid properties for offshore HTHP wells, mainly including density, sta-bility time under high temperature and heat, high temperature resistance, HTHP ifltrate loss, anti-contamination capacity, rheological performance at low temperature and inhibition capacity to hydrates;comes up with the idea that the stability time at high temperature and heat, resistance to high temperature and HTHP ifltrate loss should be the three key indicators for property design and evaluation of HTHP drilling lfuid;has established the evaluation method for stability time at static high temperature and heat of drilling lfuid HTHP well and dynamic resistance to high temperature through circulation simulated by ultra-HTHP rheometer Chandler 7600. This paper also provides detailed information on anti-232℃ultra-high temperature chromium-free environment-friendly water

  15. 气井钻井溢流早期监测技术%Early detection technology of overflow during drilling gas well

    Institute of Scientific and Technical Information of China (English)

    冯光通

    2016-01-01

    针对常规气井钻井过程中易发生的早期溢流问题,开展了气井钻井溢流早期监测研究。在分析气体侵入方式基础上建立了气侵流动机理模型,分析了天然气溢流对井内压力的影响;研究建立了钻井环空多相流动数学力学模型,得到了钻进过程中允许的气侵溢流临界条件判别式,进一步结合泵工作冲数和立管压力确定了早期溢流发现的判别方法。将气井钻井溢流早期监测技术应用于气井钻能在发生溢流量较少时及时发现溢流现象并报警,利于及早排出溢流,恢复安全正常钻进作业,大大降低溢流处理费用,减少溢流发现的人为因素影响,对提高气井钻井的安全性和效益有着十分重要的意义。%In view of the early overflow problem happened in conventional gas well drilling process, the early overflow detection study of gas well drilling was carried out. Based on the analysis of the gas invasion method, the mechanism model of gas flow was established and the influence of the gas overflow to the borehole pressure was analysed. The drilling annulus multiphase mathematical and mechanical model was established in the research. The gas cut overflow critical condition allowed in the process of drilling and the early overflow discriminated method were found using pump working punch number and standpipe pressure. Gas well drilling overflow early detection technology is ap-plied in gas well drilling, which can find the overflow exists in time and raise the alarm when the o-verflow capacity is small. The overflow can be discharged as soon as possible and the normal drilling work can be restored, which greatly reduce the overflow processing costs and the artificial factors of the overflow detection. This detection technology has a vital significance on enhancing the security and efficiency of gas well drilling.

  16. Experimental and numerical simulations of bottom hole temperature and pre-ssure distributions of supercritical CO2 jet for well-drilling

    Institute of Scientific and Technical Information of China (English)

    王瑞和; 霍洪俊; 黄志远; 宋慧芳; 倪红坚

    2014-01-01

    The supercritical carbon dioxide (SC-CO2) drilling is a novel drilling technique developed in recent years. A detailed study of temperature and pressure distributions of the SC-CO2 jet on the bottom of a well is essensial to the SC-CO2 drilling. In this paper, the distributions of pressure and temperature on the bottom of the hole during the SC-CO2 jet drilling are simulated experimentally and numerically, and the impacts of the nozzle diameter, the jet length, and the inlet pressure of the SC-CO2 jet are analyzed. It is shown that, the bottom hole temperature and pressure increase with the increase of the nozzle diameter, and the bottom hole temperature reduces and the pressure increases first and then decreases with the increase of the jet length, indicating that the jet length has an optimum value. The increase of the inlet pressure can increase the temperature and pressure on the bottom, which has a positive effect on the drilling rate.

  17. A feasibility study to estimate minimum surface-casing depths of oil and gas wells to prevent ground-water contamination in four areas of western Pennsylvania

    Science.gov (United States)

    Buckwalter, T.F.; Squillace, P.J.

    1995-01-01

    Hydrologic data were evaluated from four areas of western Pennsylvania to estimate the minimum depth of well surface casing needed to prevent contamination of most of the fresh ground-water resources by oil and gas wells. The areas are representative of the different types of oil and gas activities and of the ground-water hydrology of most sections of the Appalachian Plateaus Physiographic Province in western Pennsylvania. Approximate delineation of the base of the fresh ground-water system was attempted by interpreting the following hydrologic data: (1) reports of freshwater and saltwater in oil and gas well-completion reports, (2) water well-completion reports, (3) geophysical logs, and (4) chemical analyses of well water. Because of the poor quality and scarcity of ground-water data, the altitude of the base of the fresh ground-water system in the four study areas cannot be accurately delineated. Consequently, minimum surface-casing depths for oil and gas wells cannot be estimated with confidence. Conscientious and reliable reporting of freshwater and saltwater during drilling of oil and gas wells would expand the existing data base. Reporting of field specific conductance of ground water would greatly enhance the value of the reports of ground water in oil and gas well-completion records. Water-bearing zones in bedrock are controlled mostly by the presence of secondary openings. The vertical and horizontal discontinuity of secondary openings may be responsible, in part, for large differences in altitudes of freshwater zones noted on completion records of adjacent oil and gas wells. In upland and hilltop topographies, maximum depths of fresh ground water are reported from several hundred feet below land surface to slightly more than 1,000 feet, but the few deep reports are not substantiated by results of laboratory analyses of dissolved-solids concentrations. Past and present drillers for shallow oil and gas wells commonly install surface casing to below the

  18. Drilling & completion techniques for coalbed methane wells in Jincheng Area,Shanxi,China%山西晋城地区煤层气钻井完井技术

    Institute of Scientific and Technical Information of China (English)

    田中岚

    2001-01-01

    通过对晋城地区所钻煤层气井的钻井完井技术总结,提出了适合该地区煤层气开发的钻井技术、完井技术、煤层保护技术、绳索取心技术、固井技术等。%It is introduced in the paper that a summary of drilling & completion techniques for coal-bed methane wells,which drilled in Jincheng area,Shanxi,China,1999.A set of techniques are suitable for coal-bed methane development are evaluated,such as drilling,completion,coal protection,wire line coring tools and coment.

  19. Nonpolluting drilling fluid composition

    Energy Technology Data Exchange (ETDEWEB)

    Larson, D.E.; Mocek, C.J.; Mouton, R.J.

    1983-02-22

    Disclosed is a nonpolluting drilling fluid composition. The composition mixture consisting essentially of a concentrate and any nonpolluting oil. The concentrate consists essentially of diethanolamide, a fatty acid, and a imidazoline/amide mixture.

  20. 深层水平井双聚胺基钻井液技术研究与应用%Research and Application of Double Poly Amine Drilling Fluid Technology in Deep Horizontal Well

    Institute of Scientific and Technical Information of China (English)

    刘永贵; 张洋; 徐用军

    2015-01-01

    针对大庆油田深层致密气埋藏深,储层砾岩、火山岩裂缝发育,水敏性强,钻井过程中易发生漏失、垮塌、缩径及高温钻井液性能变差等复杂,且深层水平井钻进会带来摩阻、携岩和储层污染及使用油基钻井液存在成本高、后期环保压力大等难题,在分析总结前人研究成果及经验基础上,从致密气藏地质特征及深层水平井钻井难点出发,明确了钻井液技术对策,通过开展聚胺和聚醚多元醇“双聚”抑制、封堵防塌剂的研究,配合自主研制的新型高效随钻封堵材料,研发出一套适合于深层致密气藏水平井施工的双聚胺基钻井液技术。室内研究及现场应用表明,该钻井液具有较强的封堵防塌、井眼清洁和润滑防卡能力,抗温达180℃以上,有效地解决了深层水平井漏失、垮塌、携屑、润滑问题和储层保护问题,保证了深层水平井的顺利施工,创造了大庆油田深层水平井钻井周期最短(109 d),井深最深(5048 m),水平段最长(969.22 m),井底温度最高(180℃)等几项新纪录,完全满足了徐家围子地区深层致密气藏的钻探需求,为深层水平井安全、快速、高效钻井提供了技术保障。%According to the complex geological conditions of deep tight gas reservoir in Daqing oilfield, fracture developing in conglomerate and volcano rocks in the reservoir and strong water sensitivity;leakage, collapse, diameter shrinkage and drilling fluid property degradation while drilling at high temperature; friction, cuttings carrying and reservoir pollution in deep horizontal well drilling, as well as the high cost and late environmental protection pressure caused by the use of oil-based drilling fluid, on the basis of the analysis and summary of the previous experience, starting from the geological char-acteristics in tight gas reservoir and difficult points of deep horizontal well

  1. Lithologic Framework Modeling of the Fruitvale Oil Field Investigating Interaction Between Wastewater Injection Wells and Usable Groundwater

    Science.gov (United States)

    Treguboff, E. W.; Crandall-Bear, A. T.

    2015-12-01

    The Fruitvale Oil Field lies in a populated area where oil production, water disposal injection wells, and drinking water wells lie in close proximity. The purpose of this project is to build a lithological framework of the area that can then be used to determine if water disposal from petroleum production has a chance of reaching usable groundwater aquifers. Using the DOGGR database, data were collected from well logs. Lithologic data from drilling logs and cores were coded and entered into a relational database, where it was combined with the surface elevation and location coordinates of each well. Elevation data was acquired through ArcGIS using a USGS 24k 10 m DEM. Drillers logs that started at the surface, and were continuous, were sorted by the density of intervals recorded, in order to select high quality drillers logs for use in creating a model. About 900 wells were coded and approximately 150 wells were used in the model. These wells were entered into the modeling program (Rockworks), which allowed the wells to be visualized as strip logs and also as cross sections, and 2D fence models were created to represent subsurface conditions. The data were interpolated into 3D models of the subsurface. Water disposal wells, with the depths of the perforation intervals as well as injection volume, were added to the model, and analyzed. Techniques of interpolation used in this project included kriging, which requires statistical analysis of the data collected. This allowed correlation between widely-spaced wells. Up scaling the data to a coarse or fine texture was also been found to be effective with the kriging technique. The methods developed on this field can be used to build framework models of other fields in the Central Valley to explore the relationship between water disposal injection and usable groundwater.

  2. Tesco's Bob Tessari: launching a drilling revolution

    Energy Technology Data Exchange (ETDEWEB)

    Budd, G.

    2002-07-01

    The 'Casing Drilling' technology, patented by Tesco, which allows operators to simultaneously drill, case and evaluate oil and gas wells, is described. The system is claimed to substantially reduce the amount of lost circulation, loss of well control and bore hole instability problems that have been documented to account for about 25 per cent of total rig time on a well, and at least $4 billion (or 10 per cent of the $40 billion annual global drilling tab) spent on 'unscheduled events' associated with tripping drill pipe. With the Casing Drilling process, wells are drilled using standard oilfield casing instead of drill pipe. The host of downhole problems associated with tripping in and out of the hole are avoided, as the casing pipe is never removed. Instead, drill bits and other downhole tools are tripped through the casing with wireline at a rate of about 500 ft per minute, drastically reducing tripping time. Tesco also developed the portable top drive, the manufacture and rental of which constitutes a large part of the company's business, besides helping technologically to make Casing Drilling possible. Much of the company's success is attributed to the tenacity and zest for innovative approaches of the company's CEO, Bob Tessari, who is largely responsible for the company finding itself at the centre of a drilling technology revolution.

  3. φ139.7 mm 筛管顶部注水泥免钻塞固井完井技术%φ139.7 mm Plug-Drilling-Free Well Cementing Completion Technology

    Institute of Scientific and Technical Information of China (English)

    冯德杰; 李国锋; 赵勇

    2014-01-01

    φ139.7 mm plug-drilling-free well cementing completion technology was studied to replace conventional φ139.7 mm screen top cementing technique which was deficient over an extended period of plug drilling ,sticking ,casing and screen damage ,and impact on subsequent tripping-in of the string .Based on the screen-top-cementing well completion technique ,the existing φ177.8 mm plug-drilling-free well ce-menting tool was redesigned by adding ball socket ,upper rubber packer ,and removable sealing mechanism and optimizing the pressure differential of shear pins ,so as to develop theφ139.7 mm plug-drilling-free well cementing tool and supporting technology .Field tests in 3 wells showed that the φ139.7 mm plug-drilling-free well cementing tool could create piston effects for the circulation while running casing ,well cementing assisted with the upper rubber packer ,and fish releasing after landing ,thus reducing the fishing force by more than 200 kN and the completion time by about 30% .The study also suggested that the φ139.7 mm plug-drilling-free well completion technology was devoid of such completion procedures as plug drilling , thus avoiding risks in completions .T herefore ,the technology is suitable for screen-top-cementing opera-tions in all kinds of oil reservoirs ,and medium-deep ,deep and large-hole wells .%为解决常规φ139.7 mm筛管顶部注水泥固井时钻塞时间长、易卡钻、易损坏套管和筛管、影响后期作业管柱下入等问题,依据筛管顶部注水泥固井完井技术要求,在现有φ177.8 m m免钻塞固井工具的基础上,通过设计增加球座、上封隔胶筒和可移动密封机构,优化剪钉压力级差,研制了φ139.7 mm 免钻塞固井工具,形成了φ139.7 m m免钻塞固井完井配套技术。该技术在3口井进行了现场试验,结果表明,φ139.7 m m免钻塞固井工具可实现下套管钻井液循环、上封隔胶筒辅助固井、碰压后解除打捞时的

  4. Logging by oil based drilling fluid plus PDC drill%油基钻井液加PDC钻头钻井条件下录井方法探讨

    Institute of Scientific and Technical Information of China (English)

    初玉东

    2015-01-01

    Oil based drilling fluid plus PDC drill are introduced in this paper. The effects of the technology on conventional logging are examined to improve the logging methods along with reduce the influence of the fluid on logging.%本文主要介绍了油基钻井液加PDC钻头钻井技术的高效运用,针对其对传统录井的影响进行了分析,对其影响下的不同的录井手段进行了有针对性的改进,并最大限度地排除油基钻井液对录井的影响。

  5. Environmental Assessment: Geothermal Energy Geopressure Subprogram. Gulf Coast Well Drilling and Testing Activity (Frio, Wilcox, and Tuscaloosa Formations, Texas and Louisiana)

    Energy Technology Data Exchange (ETDEWEB)

    None

    1981-09-01

    The Department of Energy (DOE) has initiated a program to evaluate the feasibility of developing the geothermal-geopressured energy resources of the Louisiana-Texas Gulf Coast. As part of this effort, DOE is contracting for the drilling of design wells to define the nature and extent of the geopressure resource. At each of several sites, one deep well (4000-6400 m) will be drilled and flow tested. One or more shallow wells will also be drilled to dispose of geopressured brines. Each site will require about 2 ha (5 acres) of land. Construction and initial flow testing will take approximately one year. If initial flow testing is successful, a continuous one-year duration flow test will take place at a rate of up to 6400 m{sup 3} (40,000 bbl) per day. Extensive tests will be conducted on the physical and chemical composition of the fluids, on their temperature and flow rate, on fluid disposal techniques, and on the reliability and performance of equipment. Each project will require a maximum of three years to complete drilling, testing, and site restoration.

  6. First evaluation of foraminiferal metabarcoding for monitoring environmental impact from an offshore oil drilling site.

    Science.gov (United States)

    Laroche, Olivier; Wood, Susanna A; Tremblay, Louis A; Ellis, Joanne I; Lejzerowicz, Franck; Pawlowski, Jan; Lear, Gavin; Atalah, Javier; Pochon, Xavier

    2016-09-01

    At present, environmental impacts from offshore oil and gas activities are partly determined by measuring changes in macrofauna diversity. Morphological identification of macrofauna is time-consuming, expensive and dependent on taxonomic expertise. In this study, we evaluated the applicability of using foraminiferal-specific metabarcoding for routine monitoring. Sediment samples were collected along distance gradients from two oil platforms off Taranaki (New Zealand) and their physico-chemical properties, foraminiferal environmental DNA/RNA, and macrofaunal composition analyzed. Macrofaunal and foraminiferal assemblages showed similar shifts along impact gradients, but responded differently to environmental perturbations. Macrofauna were affected by hypoxia, whereas sediment grain size appeared to drive shifts in foraminifera. We identified eight foraminiferal molecular operational taxonomic units that have potential to be used as bioindicator taxa. Our results show that metabarcoding represents an effective tool for assessing foraminiferal communities near offshore oil and gas platforms, and that it can be used to complement current monitoring techniques. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. 17 CFR 229.1208 - (Item 1208) Oil and gas properties, wells, operations, and acreage.

    Science.gov (United States)

    2010-04-01

    ... properties, wells, operations, and acreage. 229.1208 Section 229.1208 Commodity and Securities Exchanges... Registrants Engaged in Oil and Gas Producing Activities § 229.1208 (Item 1208) Oil and gas properties, wells, operations, and acreage. (a) Disclose, as of a reasonably current date or as of the end of the fiscal...

  8. Feasibility of real-time geochemical analysis using LIBS (Laser-Induced Breakdown Spectroscopy) in oil wells

    Science.gov (United States)

    Shahin, Mohamed

    2014-05-01

    The oil and gas industry has attempted for many years to find new ways to analyze and determine the type of rocks drilled on a real time basis. Mud analysis logging is a direct method of detecting oil and gas in formations drilled, it depends on the "feel" of the bit to decide formation type, as well as, geochemical analysis which was introduced 30 years ago, starting with a pulsed-neutron generator (PNG) based wireline tool upon which LWD technology was based. In this paper, we are studying the feasibility of introducing a new technology for real-time geochemical analysis. Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy, It is a cutting-edge technology that is used for many applications such as determination of alloy composition, origin of manufacture (by monitoring trace components), and molecular analysis (unknown identification). LIBS can analyze any material regardless of its state (solid, liquid or gas), based upon that fact, we can analyze rocks, formation fluids' types and contacts between them. In cooperation with the National Institute of Laser Enhanced Science, Cairo University in Egypt, we've done tests on sandstone, limestone and coal samples acquired from different places using Nd: YAG Laser with in addition to other components that are explained in details through this paper to understand the ability of Laser to analyze rock samples and provide their elemental composition using LIBS technique. We've got promising results from the sample analysis via LIBS and discussed the possibility of deploying this technology in oilfields suggesting many applications and giving a base for achieving a quantitative elemental analysis method in view of its shortcomings and solutions.

  9. Geothermal Energy Production from Oil/Gas Wells and Application for Building Cooling

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Honggang [Rutgers University; Liu, Xiaobing [ORNL

    2016-01-01

    One significant source of low-temperature geothermal energy is the coproduced hot water from oil/gas field production. In the United States, daily oil production has reached above 8 million barrels in recent years. Considering various conditions of wells, 5-10 times or more water can be coproduced in the range of temperature 120 F to 300 F. Like other geothermal resources, such energy source from oil/gas wells is under-utilized for its typical long distance from consumption sites. Many oil/gas fields, however, are relatively close (less than 10 miles) to consumers around cities. For instance, some petroleum fields in Pennsylvania are only a few miles away from the towns in Pittsburg area and some fields in Texas are quite close to Houston. In this paper, we evaluate geothermal potential from oil/gas wells by conducting numerical simulation and analysis of a fractured oil well in Hastings West field, Texas. The results suggest that hot water can be continuously coproduced from oil wells at a sufficient rate (about 4000 gallons/day from one well) for more than 100 years. Viable use of such geothermal source requires economical transportation of energy to consumers. The recently proposed two-step geothermal absorption (TSGA) system provides a promising energy transport technology that allows large-scale use of geothermal energy from thousands of oil/gas wells.

  10. 变频器在国内石油钻机的应用%Application of Converter in Domestic Oil Drilling Machine

    Institute of Scientific and Technical Information of China (English)

    高成海

    2001-01-01

    文章介绍了变频器在石油钻机的应用。对钻井工艺特点,控制方案,系统组成及注意事项做了简要论述。%The paper introduces the application of frequency converter in domestic oil drilling machine.It isdiscussed that the technological characteristics,control scheme,structure of system and points for attention.

  11. Outer Continental Shelf Oil and Natural Gas Wells - Pacific OCS Region NAD 83

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains surface locations for oil and gas wells located in the Pacific Coast federal waters. Note: Wells are being added or modified continuously;...

  12. Outer Continental Shelf Oil and Natural Gas Wells - Gulf of Mexico Region NAD 27

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains surface locations for oil and gas wells located in the Gulf of Mexico federal waters. Note: Wells are being added or modified continuously;...

  13. Outer Continental Shelf Oil and Natural Gas Wells - Atlantic Region NAD83

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains surface locations for oil and gas wells located in the Atlantic federal waters. All wells in the Atlantic Region were completed and abandoned...

  14. Innovative well-completion strategy for challenging heavy-oil wells within mature fields requiring sand control in Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Huimin, YE; Patarroyo, Mauricio [Mansarovar Energy (Colombia); Lopez, Nicolas; Perez, Carlos [Schlumberger (Colombia)

    2011-07-01

    With the depletion of conventional oil resources and the development of new techniques, exploitation of heavy oil wells has become common in Northern South America. Nevertheless those projects face the great challenge of implementing environment and sand management systems while optimizing the production and reservoir's life. The aim of this paper is to present a completion methodology, its results and impacts on the productivity of the reservoir. Different simulations to select the sand control strategy and sensitivity studies to confirm their decision were carried out in the Moriche field, a heavy-oil mature field located in Colombia. Following the simulation results, stainless steel wool based screens were finally chosen and their implementation led to savings in time and costs and the elimination of downhole issues. The use of the completion methodology presented herein on the Moriche wells led to an overall improvement in productivity.

  15. Remediation of oil-based drill cuttings through a biosurfactant-based washing followed by a biodegradation treatment.

    Science.gov (United States)

    Yan, Ping; Lu, Mang; Guan, Yueming; Zhang, Weimu; Zhang, Zhongzhi

    2011-11-01

    In this study, oil-based drill cuttings were washed by a rhamnolipid solution and then subjected to bioremediation in stainless steel boxes using sawdust as bulking agent. A mixed bacterial culture, mainly containing Pseudomonas, Acinetobacter, Alcaligenes, Agrobacterium, and Comamonas, was used as inoculums. Approximately 83% of organics were removed after washing under optimal conditions (liquid/solid ratio, 3:1; washing time, 20 min; stirring speed, 200 rpm; rhamnolipid concentration, 360 mg/L; temperature, 60 °C), and the total petroleum hydrocarbon concentration of the cuttings dropped from 85,000 to 12,600 mg/kg. In the bioremediation stage, concentrations of saturated and aromatic hydrocarbons decreased to 2140 and 1290 mg/kg, respectively, after 120 days. Ultrahigh-resolution mass spectrometry demonstrated that oxygen- and nitrogen-containing compounds had undergone biodegradation. The results of this study indicate that this two-stage remedial system can reduce treatment time and increase treatment efficiency as compared with a single bioremediation or washing treatment.

  16. Well blowout rates and consequences in California Oil and Gas District 4 from 1991 to 2005: Implications for geological storage of carbon dioxide

    Energy Technology Data Exchange (ETDEWEB)

    Jordan, Preston; Jordan, Preston D.; Benson, Sally M.

    2008-05-15

    Well blowout rates in oil fields undergoing thermally enhanced recovery (via steam injection) in California Oil and Gas District 4 from 1991 to 2005 were on the order of 1 per 1,000 well construction operations, 1 per 10,000 active wells per year, and 1 per 100,000 shut-in/idle and plugged/abandoned wells per year. This allows some initial inferences about leakage of CO2 via wells, which is considered perhaps the greatest leakage risk for geological storage of CO2. During the study period, 9% of the oil produced in the United States was from District 4, and 59% of this production was via thermally enhanced recovery. There was only one possible blowout from an unknown or poorly located well, despite over a century of well drilling and production activities in the district. The blowout rate declined dramatically during the study period, most likely as a result of increasing experience, improved technology, and/or changes in safety culture. If so, this decline indicates the blowout rate in CO2-storage fields can be significantly minimized both initially and with increasing experience over time. Comparable studies should be conducted in other areas. These studies would be particularly valuable in regions with CO2-enhanced oil recovery (EOR) and natural gas storage.

  17. Radon in the water from drilled wells. Results from an investigation in Oerebro; Radon i vatten fraan bergborrade brunnar. Resultat fraan en undersoekning i oerebro kommun

    Energy Technology Data Exchange (ETDEWEB)

    Liden, E.; Andersson, Lennart [Regionsjukhuset, Oerebro (Sweden). Yrkes- och miljoemedicinska kliniken; Linden, A. [Svensk Geofysik AB, Falun (Sweden); Aakerblom, G. [Statens Straalskyddsinstitut, Stockholm (Sweden); Aakesson, T. [Miljoe- och haelsoskyddsfoervaltningen, Oerebro (Sweden)

    1995-09-01

    In 1991 a drilled well containing water with a radon count of about 20,000 Bq/l was found in the city of Oerebro in southern Sweden. A study was started to develop measures to decrease the radon content of water, investigate public health risks and determine the prevalence of high-radon waters in Sweden. 1991-94 various techniques were tested to reduce the concentration of radon in water. The efficiency of aerating high-radon drinking water was studied under field conditions using two modified aerators in a well, in a pressure tank, and in a column of pellets. The efficiency varied from 20 to 99%. A survey of radon in water from 269 drilled wells was conducted in the Municipality of Oerebro. In water from 78 wells, the mean concentration of radon was 1336 Bq/l. The emanation of radon during normal household activities was studied in a home supplied with water from a drilled well whose radon count was approx 20,000 Bq/l. A geological investigation revealed the presence of thin Uranium-loaded fissures in the bedrock (granite) surrounding the well. 130 refs, 16 figs, 14 tabs.

  18. Hindcast oil spill simulations from the existing offshore wells in the Eastern Mediterranean Levantine Basin

    Science.gov (United States)

    Zodiatis, George; Alves, Tiago M.; Kokinou, Eleni; Radhakrishnan, Hari; Panagiotakis, Costas; Lardner, Robin

    2017-04-01

    Following the expansion of the exploration and exploitation of the hydrocarbons in the Eastern Mediterranean Levantine Basin during the last 5 years, oil spill simulations for 20 existing offshore platforms/wells were carried out based on new and high resolution bathymetric, meteorological, oceanographic, and geomorphological data. The oil spill simulations were carried out using the well known MEDSLIK oil spill model, with the use of high temporal and spatial resolution data for 3D sea currents, winds and waves, provided by the CYCOFOS forecasting system, downscaled from the Copernicus Marine environment monitoring service (CMEMS). The hindcast oil spill simulations from the 20 potential oil spill sources have been prepared for a period of four years, presenting the movement of the spills and the area affected, the fate parameters, the first impact on the coast and the extend of the affected coastline from each location every week. The modeled oil spills took into account the oil spill scenario following the REMPEC MEDEXPOL 2013 experiment. Moreover, a qualitative analysis of the seabed morphology has been applied to examine the direction of the oil slick expansion, shown that the direction of the major axis of the oil spills, in most of the cases examined, is oriented according to the prevailing azimuth of bathymetric features. The oil spill simulations from the existing offshore wells/platforms, show a clear trend for east and northeast movement of the oil spills in the Eastern Mediterranean Levantine Basin, with the first impact at the coast in a time interval between 1 to 20 days after the first oil spilled at sea, depending on the location of the platforms/wells and of the intensity and direction of the meteo-ocean data.

  19. How to optimize solids control economics, efficiency. [Waste management planning for oil and gas well cuttings

    Energy Technology Data Exchange (ETDEWEB)

    Robinson, L. (International Drilling Consultants, Houston, TX (United States))

    1994-09-01

    Solids control efficiency can be more effectively managed using calculations that include desired removal efficiency, the amount of drilled solids in the mud discard stream, the targeted drilled solids concentration and the barrels of drilling fluid that must be added for each barrel of solids discarded. The following discussion shows: how dilution is necessary; how too much dilution creates problems with excessive drilling fluid volumes and excessive drilling fluid wastes; how removal efficiencies affect the drilling fluid costs; and how the dryness of the drilled solids affects drilling fluid and drilling waste costs. Three primary variables--dryness of discarded solids, targeted drilled solids concentration in the drilling fluid and removal efficiency--are important in evaluating a rig solids management system. They all play a role in minimizing drilling fluid and drilling waste costs.

  20. 深水采油树下放过程钻柱力学分析%Drill string mechanical analysis of running deepwater oil tree

    Institute of Scientific and Technical Information of China (English)

    林秀娟; 肖文生; 王鸿雁

    2011-01-01

    根据海洋环境载荷和材料力学理论,考虑钻柱参数、海洋环境载荷、钻井船漂移量、作业水深及采油树重力等特征,建立深水采油树下放过程钻柱力学分析模型.通过对模型进行数值求解,对不同影响因素下沿钻柱的横向位移、漂移角、弯矩和剪力进行分析.结果表明:波浪载荷对钻柱上部的弯矩影响很大而对钻柱横向位移影响很小,对采油树深水下放忽略波浪力不会产生较大的误差;钻井船的漂移量对钻柱横向位移有一定的影响而对钻柱偏移角、弯矩和剪力几乎没有影响;海水阻力系数、海面海流速度及作业水深对深水采油树下放过程钻柱强度均有较大的影响.%A mechanical analytical model of drill string for running deepwater oil tree was established according to the marine environmental load and material mechanics theory. The drill string parameter, the marine environmental load, drilling ship drift, operating water depth and subsea tree weight were considered in the model. The lateral displacement, angular distortion , bending moment and shear force were analyzed. The results show that wave load has great effect on bending moment of the drill string head, but has little influence on lateral displacement, thus it can't produce large error without considering deepwater wave load. Drilling ship drift has certain effect on lateral displacement of the drill string, but has little influence on angular distortion, bending moment and shear force of the drill string. The resistance coefficient, current velocity and operating water depth all have great influences on the drill string strength of running deepwater oil tree.

  1. Dual gradient drilling - simulations during connection operations

    OpenAIRE

    Time, André

    2014-01-01

    As oilfields are ageing and depleting, operators are forced to start searching for oil in more hostile environments. These new environments can introduce new drilling challenges. Prospects like ultra deep water reservoirs and depleted offshore reservoirs are difficult to drill with conventional drilling. This has lead the industry to developing the Dual Gradient Drilling (DGD) system. DGD is an unconventional drilling method and it is classified as a Managed Pressure Drilling ...

  2. Testing methodology of diamond composite inserts to be used in the drilling of petroleum wells; Metodologia de testes de insertos compositos diamantados a serem usados na perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Bobrovnitchii, G.S.; Filgueira, M.; Skury, A.L.D.; Tardim, R.C. [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil)], e-mail: rtardim@terra.com.br

    2006-07-01

    The useful life of the inserts used in the cutters of the drills for perforation of oil wells determines the quality of the perforation as well as the productivity. Therefore, the research of the wear of insert is carried through with the objective to foretell the most important properties of the inserts. Due to the fact of the UENF to be developing the processes of composites sintering to the synthetic diamond base, it is interesting to define the testing methodology of the gotten inserts. The proposed methodology is based on the evaluation of the wear suffered by de sample. For this end a micro processed 'Abrasimeter', model AB800-E, manufactured for the Contenco Company was used. The instrument capacity is 1,36 kVA; axial load applied in the cutter up to 50 kgf; rotation of table speed 20 rpm; course of the tool in radial direction speed before 2 m/min; dimensions of the granite block D = 808 mm, d = 484 mm, h = 50 mm. The gotten results show that the proposed methodology can be used for the evaluation of the inserts of the cutters applied in perforation drills. (author)

  3. Preparation and performance evaluation on humic acid fluid loss additive for oil-based drilling fluid%油基钻井液用腐殖酸类降滤失剂的研制与性能评价

    Institute of Scientific and Technical Information of China (English)

    赵泽

    2014-01-01

    使用有机胺对腐殖酸进行亲油改性,研制出一种适合油基钻井液用的腐殖酸类降滤失剂FLA180。室内性能评价表明,采用4%FLA180配制的密度为2.0 g/cm3油包水乳化钻井液在180℃高温下中压滤失量为0 mL、高温高压滤失量为9 mL;具有较强的抗钻屑和盐污染能力;同时该降滤失剂具有降粘作用,有利于提高机械钻速,适用于高温高压深井。通过性能比较,该降滤失剂降滤失性能优于国内主要应用的油基降滤失剂性能。%A fluid loss additive named FLA180 in oil-based drilling fluid is PrePared by reacting organic amine with humic acid. Indoor Performance evaluation shows under high temPerature of 180℃,API filtra-tion loss and HTHP filtration of water in-oil emulsion drilling fluid,which contains 4% FLA180,with the density of 2. 0 g/cm3 ,and the Pressure filtration is 0 mL and 9 mL;Having a strong ability to resist drill-ing cuttings and salt Pollution;At the same time,the fluid loss agent have a viscosity effect,which is bene-ficial to imProve the rate of Penetration,so it is suitable for high temPerature and high Pressure deeP well. Through the Performance comParison,fluid loss Performance of the fluid loss additive FLA180 is suPerior to fluid loss Performance of main fluid loss additives used at home in oil-based drilling.

  4. 苏里格气田丛式井组快速钻井技术%Faster Drilling Technique of Cluster Wells in Su Lige Gas Field

    Institute of Scientific and Technical Information of China (English)

    欧阳勇; 吴学升; 高云文; 黄占盈; 白明娜

    2011-01-01

    The unique feature of "low permeable sublayer, low porosity" in Su Iige leads to the low productivity , small well spacing, dense well network of single well, and it is located in the desert, the ecology environment is weak, which is more suitable to be developed with the cluster wells, but the long building cycle time, high drilling cost and something else elements influence the popularization of cluster wells. To achieve the strategic objective of low cost development in Su Lige gas field, it is very important to improve the drilling speed of cluster well. Aimed at the problem of cluster well drilling process in Su Lige, according to the technique research of the amount optimization of well cluster, construction of well cut plane, optimization of PDC drill bit and optimization of make up of string, a faster drilling technique scheme of cluster wells is generated and received the preferable effect in the well site.%苏里格气田“低孔、低渗”的特点决定了其单井产量低、井距小、井网密,而其地处沙漠,生态环境脆弱,更适宜采用丛式井组开发.但从式井施工周期长、钻井成本高等因素影响了从式井组的推广应用.为实现苏里气田低成本开发的战略目标,提高丛式井钻井速度就显得尤为重要.针对苏里格丛式井钻井过程存在的难题,通过井组数优化、井身剖面设计、PDC钻头的优选以及钻具组合的优化等技术研究,形成了一套苏里格气田丛式井组快速钻井的的技术方案,在现场实施中取得了较好的效果.

  5. Drill-string torsional vibration suppression using GA optimized controllers

    Energy Technology Data Exchange (ETDEWEB)

    Karkoub, M. [Texas A and M Univ. (Qatar); Abdel-Magid, Y.L. [Petroleum Inst., Abu Dhabi (United Arab Emirates); Balachandran, B. [Maryland Univ., College Park, MD (United States)

    2009-12-15

    When drilling an oil well, the drilling process is influenced by the dynamically induced vibrations resulting from design imperfections and material elasticity. Such torsional vibrations may cause premature wear and damage of drilling equipment and cause failure of drill-strings. Vibrations can also decrease the rate of penetration (ROP), and thus increase the cost of the well. In addition, vibrations can interfere with measurement-while-drilling (MWD) tools. This paper focused on drill-string dynamics and control, with particular reference to intelligent techniques that have been proposed for controller design, including genetic algorithms (GA). It reported on a study that addressed the problem of stick-slip friction at the drill-bit level. An oil well drill-string using proportional integral derivative (PID) controllers and lead-lag compensators was used together with a GA to reduce the stick-slip induced vibrations. Proposed control schemes were validated through computer simulations. The controllers were designed using different objective functions and parameter search limits. 21 refs., 1 tab., 12 figs.

  6. Oil and gas wells and pipelines on U.S. wildlife refuges: challenges for managers.

    Directory of Open Access Journals (Sweden)

    Pedro Ramirez

    Full Text Available The increased demand for oil and gas places a burden on lands set aside for natural resource conservation. Oil and gas development alters the environment locally and on a much broader spatial scale depending on the intensity and extent of mineral resource extraction. The current increase in oil and gas exploration and production in the United States prompted an update of the number of pipelines and wells associated with oil and gas production on National Wildlife Refuge System (NWRS lands. We obtained geospatial data on the location of oil and gas wells and pipelines within and close to the boundaries of NWRS lands (units acquired as fee simple (i.e. absolute title to the surface land by the U.S. Fish and Wildlife Service. We found that 5,002 wells are located in 107 NWRS units and 595 pipelines transect 149 of the 599 NWRS units. Almost half of the wells (2,196 were inactive, one-third (1,665 were active, and the remainder of the wells were either plugged and abandoned or the status was unknown. Pipelines crossed a total of 2,155 kilometers (1,339 miles of NWRS fee simple lands. The high level of oil and gas activity warrants follow up assessments for wells lacking information on production type or well status with emphasis on verifying the well status and identifying abandoned and unplugged wells. NWRS fee simple lands should also be assessed for impacts from brine, oil and other hydrocarbon spills, as well as habitat alteration associated with oil and gas, including the identification of abandoned oil and gas facilities requiring equipment removal and site restoration.

  7. EDTA-induced phytoextraction of lead and barium by brachiaria (B. decumbens cv. Basilisk in soil contaminated by oil exploration drilling waste

    Directory of Open Access Journals (Sweden)

    André Fernão Martins de Andrade

    2014-08-01

    Full Text Available The phytoextraction of heavy metals using chelating agents has been widely studied for the remediation of contaminated soils. To evaluate the efficiency of EDTA-induced phytoextraction of Ba and Pb using Brachiaria decumbens for the remediation of soil contaminated by oil well drilling and exploration waste, an experiment was conducted by applying a single dose (6 mmol EDTA kg-1 soil and split doses of EDTA (three applications of 2 mmol EDTA kg-1 soil. The samples were subjected to sequential extractions using the method proposed by Ure et al. (1993 as modified by Rauret et al. (1999.The application of EDTA did not influence the distribution of Ba in various chemical fractions of the soil. The dry matter production did not differ significantly between the treatments and the control, thereby demonstrating the tolerance of plants to the experimental conditions. The absorption of Pb by plants was influenced by the application of EDTA. The application of a single dose of EDTA influenced the absorption of Pb and its translocation to the aerial plant parts. The application of split doses favoured higher accumulation of Pb in roots. Because of its tolerance to heavy metals and EDTA, B. decumbens has the potential to be used in phytostabilisation.

  8. 30 CFR 250.468 - What well records am I required to submit?

    Science.gov (United States)

    2010-07-01

    ... OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... drilling operations in the GOM OCS Region, you must submit form MMS-133, Well Activity Report, to the... 30 Mineral Resources 2 2010-07-01 2010-07-01 false What well records am I required to submit?...

  9. Metal and hydrocarbon behavior in sediments from Brazilian shallow waters drilling activities using nonaqueous drilling fluids (NAFs).

    Science.gov (United States)

    do Carmo R Peralba, Maria; Pozebon, Dirce; dos Santos, João H Z; Maia, Sandra M; Pizzolato, Tânia M; Cioccari, Giovani; Barrionuevo, Simone

    2010-08-01

    The impact of drilling oil activities in the Brazilian Bonito Field/Campos Basin (Rio de Janeiro) shell drilling (300 m) using nonaqueous fluids (NAFs) was investigated with respect to Al, Fe, Mn, Ba, Co, Pb, Cu, As, Hg, Cr, Ni, Zn, Cd, V, and aliphatic and polynuclear aromatic hydrocarbons concentrations in the sediment. Sampling took place in three different times during approximately 33 months. For the metals Al, As, Co, Cr, Cu, Cd, Fe, Ni, Mn, V, and Zn, no significant variation was observed after drilling activities in most of the stations. However, an increase was found in Ba concentration--due to the drilling activity--without return to the levels found 22 months after drilling. High Ba contents was already detected prior to well drilling, probably due to drilling activities in other wells nearby. Hydrocarbon contents also suggest previous anthropogenic activities. Aliphatic hydrocarbon contents were in the range usually reported in other drilling sites. The same behavior was observed in the case of polyaromatic hydrocarbons. Nevertheless, the n-alkane concentration increased sharply after drilling, returning almost to predrilling levels 22 months after drilling activities.

  10. Study of drilling muds on the anti-erosion property of a fluidic amplifier in directional drilling

    Directory of Open Access Journals (Sweden)

    Jiang-fu He

    2015-10-01

    Full Text Available Due to some drawbacks of conventional drilling methods and drilling tools, the application of hydraulic hammers with a fluidic amplifier have been extensively popularized since its emergence in recent years. However, the performance life of a fluidic amplifier is still unsatisfactory in oil and gas wells drilling, especially the heavy wear or erosion of the fluidic amplifier leads to the reduction of service life time of hydraulic hammers, which is derived from the incision of drilling muds with high speed and pressure. In order to investigate the influence of drilling muds, such as particle size, solid content and jet velocity, on the antierosion property of a fluidic amplifier, several groups of drilling muds with different performance parameters have been utilized to numerical simulation on basis of Computational Fluid Dynamics (CFD. Simulation results have shown that the jet nozzle of fluidic amplifiers is primarily abraded, afterwards are the lateral plates and the wedge of the fluidic amplifier, which shows extraordinary agreement with the actual cases of fluidic amplifier in drilling process. It can be concluded that particle size, solid content and jet velocity have a great influence on the anti-erosion property of a fluidic amplifier, and the erosion rate linearly varies with the particle size of drilling muds, nevertheless exponentially varies with solid content and jet velocity of drilling muds. As to improve the service life time of a fluidic amplifier, the mud purification system or low solid clay-free mud system is suggested in the operation of directional well drilling

  11. 30 CFR 203.41 - If I have a qualified deep well or a qualified phase 1 ultra-deep well, what royalty relief would...

    Science.gov (United States)

    2010-07-01

    ... REDUCTION IN ROYALTY RATES OCS Oil, Gas, and Sulfur General Royalty Relief for Drilling Deep Gas Wells on...) produced gas or oil from any deep well or ultra-deep well, has a qualified deep well or qualified phase 1 ultra-deep well, earns an RSV specified in paragraph (b) of this section. (2) produced gas or oil from...

  12. 水平井可钻滤砂管的研制与应用%Research and application of drilled filter sand tube in horizontal wells

    Institute of Scientific and Technical Information of China (English)

    郑伟林

    2012-01-01

    水平井防砂容易形成卡管柱的现象,不易后期处理.通过对可钻型滤砂管外套、管材、胶结剂的选择与性能研究,研制出一种新型可钻的防砂工具.该工具将滤砂管防砂管柱的中心管、滤砂器、本体等均设计成可钻铣或可化学降解的材料,可以在其防砂失效后,通过钻头将其钻碎,将碎块冲出即可进行下一步作业,从而解决了防砂失效后难处理的问题.现场应用4口水平井,在1年内平均日增液33.8t,日增油3.9t,取得了显著的效果.该滤砂管挡砂精度可达0.07~0.13mm,井口产液含砂量小于0.05%,且砂粒粒径小于0.07mm,措施前后同期对比,产量稍有增加,满足了防砂要求.%At present, column sticking happens frequently during sand control process in horizontal wells and is very difficult to handle post processing. A new type drillable sand control implement has been developed by selecting materials and researching properties of drillable filter tube coats, pipes and cementing agents. All the materials used in implements including central tube, sand filter and sand control tube are designed to be drilling and milling and chemical degradation. Field application in 4 horizontal wells has launched, and the result indicates that obvious effects have been achieved with liquid increase of 33.81 per day and oil production of 3.91 every day. When the drillable filter sand tubes lose its effect, it can easily damage by bit and crash the fragments simply which followed by further treatments. Experimental results show that the sand blocking precision of this filter sand tube can up to 0.07~0.13 mm, and sand content of production liquid in wellhead is less than 0.05% with sand diameter smaller than 0.07 mm. The output rises slightly comparing before and after treatment, which can meet the requirements of sand control.

  13. Constraining the abundance of high emitters is critical to mitigating the effect of abandoned oil and gas wells on methane emissions

    Science.gov (United States)

    Townsend-Small, A.; Ferrara, T.; Fries, A. E.

    2016-12-01

    Recent studies have suggested that methane inventories may underrepresent emissions from the oil and gas supply chain, and this has led to an effort by several groups to assess whether abandoned wells are a significant source. Our work has shown that unplugged wells are a larger source than plugged wells, and that a small percentage of unplugged wells likely make up the majority of emissions. Preliminary work also suggests that the oldest oil and gas producing region, the Appalachian Basin, has the largest emitters. However, many of these wells are over 100 years old and state databases lack accurate plugging and location data. Our current work is focused on determining the proportion of high emitters among abandoned wells in the Appalachian basin of Ohio. We are also making component-level measurements of conventional oil and gas wells on federal land for comparison. Our methods include analysis of gas composition to identify the relative contributions of biogenic and thermogenic methane to emissions. Identifying the location and emission rate of abandoned wells will not only mitigate a potential regionally important methane source, but will also help prevent interactions of these older wells with new drilling for shale gas as well as groundwater.

  14. Time delay estimation in the ultrasonic flowmeter in the oil well

    Science.gov (United States)

    Sun, Jian; Lin, Weijun; Zhang, Chengyu; Shen, Zhihui; Zhang, Hailan

    2010-01-01

    A new prototype of ultrasonic flowmeter used in the oil well is presented. The flowmeter depends on the time delay between the propagating times of the downstream and upstream ultrasonic pulses. The ultrasonic passageway is slanted to prevent the disadvantage introduced by the high viscosity of the oil. Two method of time delay estimation: threshold and cross-correlation are both studied and realized.

  15. Cement for Oil Well Cementing Operations in Ghana

    African Journals Online (AJOL)

    Michael

    This research evaluates the ... The paper details results of API specification tests and the physical ... Keywords: Compressive strength, Free fluid, Portland cement, Rheology, Thickening time ..... Geothermal Well Cementing” Proceedings of.

  16. Stinger Enhanced Drill Bits For EGS

    Energy Technology Data Exchange (ETDEWEB)

    Durrand, Christopher J. [Novatek International, Inc., Provo, UT (United States); Skeem, Marcus R. [Novatek International, Inc., Provo, UT (United States); Crockett, Ron B. [Novatek International, Inc., Provo, UT (United States); Hall, David R. [Novatek International, Inc., Provo, UT (United States)

    2013-04-29

    The project objectives were to design, engineer, test, and commercialize a drill bit suitable for drilling in hard rock and high temperature environments (10,000 meters) likely to be encountered in drilling enhanced geothermal wells. The goal is provide a drill bit that can aid in the increased penetration rate of three times over conventional drilling. Novatek has sought to leverage its polycrystalline diamond technology and a new conical cutter shape, known as the Stinger®, for this purpose. Novatek has developed a fixed bladed bit, known as the JackBit®, populated with both shear cutter and Stingers that is currently being tested by major drilling companies for geothermal and oil and gas applications. The JackBit concept comprises a fixed bladed bit with a center indenter, referred to as the Jack. The JackBit has been extensively tested in the lab and in the field. The JackBit has been transferred to a major bit manufacturer and oil service company. Except for the attached published reports all other information is confidential.

  17. Ways to improve oil and gas prospecting in West Uzbekistan

    Energy Technology Data Exchange (ETDEWEB)

    Ubaikhodzhaev, T.I.

    1981-07-01

    Some innovations in conducting prospecting for oil and gas in the western part of Uzbekistan are described: drilling of single (evaluation, parametric) wells in places where seismic tests have shown some anomalies; reducing drilling time and costs, correct combination of parametric drilling with seismic prospecting. 12 refs.

  18. 实体筛管完井技术在氮气钻井中的应用%Application of stuffed screen pipe completion technology in N2 drilled wells

    Institute of Scientific and Technical Information of China (English)

    赵前进

    2009-01-01

    In view of the unique and complicated completion method for gas drilling, and high cost and low reliability of DDV and leakless inflatable screen pipe, the stuffed screen pipe with temporary plugging agent was developed autonomously. With this technology, the screen pipe was plugged with temporary plugging agent to be blank tubing in advance, and then slot or perforate holes on the pipe. After running the screen pipe downhole, the temporary plugging agent will be drilled, and then the formation will communicate with screen pipe. This technology was successfully used in the N_2 drilled well which is Niuqi-1 Well in Santanghu Oil Field, the daily production rate after completion was 2.5×10~4 m~3 which is 6 times more than offset wells. The low cost, low pollution and safer screen pipe designing method is an effective means for N_2 drilled wells completion.%针对气体钻井完井方式单一、完井程序复杂、采用套管阀或非透式可膨胀筛管完井技术成本高、可靠性差等问题,自主研发了利用暂堵剂密封筛管的实体筛管完井技术.该技术先将筛管用暂堵剂密封为盲管后对其进行割缝或打孔处理,然后利用成熟的下尾管完井技术入井后钻掉暂堵剂,最终实现储层与筛管连通.该技术在三塘湖油田牛气1井氮气钻井中得到了成功应用,完钻后日产气量2.5×10~4 m~3,为邻井的6倍以上,实现了低成本、零污染、安全顺利下入筛管的全过程氮气钻完井技术,为降低氮气钻井筛管完井成本提供了一条有效的途径.

  19. Performance of Surfactant Methyl Ester Sulphonate solution for Oil Well Stimulation in reservoir sandstone TJ Field

    Science.gov (United States)

    Eris, F. R.; Hambali, E.; Suryani, A.; Permadi, P.

    2017-05-01

    Asphaltene, paraffin, wax and sludge deposition, emulsion and water blocking are kinds ofprocess that results in a reduction of the fluid flow from the reservoir into formation which causes a decrease of oil wells productivity. Oil well Stimulation can be used as an alternative to solve oil well problems. Oil well stimulation technique requires applying of surfactant. Sodium Methyl Ester Sulphonate (SMES) of palm oil is an anionic surfactant derived from renewable natural resource that environmental friendly is one of potential surfactant types that can be used in oil well stimulation. This study was aimed at formulation SMES as well stimulation agent that can identify phase transitions to phase behavior in a brine-surfactant-oil system and altered the wettability of rock sandstone and limestone. Performance of SMES solution tested by thermal stability test, phase behavioral examination and rocks wettability test. The results showed that SMES solution (SMES 5% + xylene 5% in the diesel with addition of 1% NaCl at TJformation water and SMES 5% + xylene 5% in methyl ester with the addition of NaCl 1% in the TJ formation water) are surfactant that can maintain thermal stability, can mostly altered the wettability toward water-wet in sandstone reservoir, TJ Field.

  20. 油井的防砂技术研究%Research of Sand Control Technique of Oil Well

    Institute of Scientific and Technical Information of China (English)

    李明; 王蒙; 赵英男; 陈思; 何金钢

    2013-01-01

    随着油田进入开发后期,开采的难度不断加大,含砂井越来越多。这种现象已成为油田开发过程中的主要难题之一。各油田均存在大量的高含砂井。油井出砂的原因极其复杂,从开始钻井到采油、注水过程中,每一个环节对出砂都有影响。而人为因素造成的油井出砂,应该尽量避免。分析油井的出砂机理,应用更先进的防砂工艺技术,提高防砂效果显得尤为重要。%As the field entered the development stage, its exploitation is becoming increasingly difficult, its oil wells have more and more sand. The phenomenon has become one of the main problems in the process of oil field development. There are various oilfield with high sand content well. Sand production is very complex. From the start of drilling oil, water flooding process, each link may have an impact on the sand. We should try to avoid man-made sand. Therefore, the sand production mechanism analysis, selection of sand control technology is more advanced, improving the effect of sand control is particularly important.

  1. DISTRIBUTED GENERATION POWER UNITS AT MARGINAL OIL WELL SITES

    Energy Technology Data Exchange (ETDEWEB)

    Mark A. Carl

    2003-10-29

    The CEC approved funding on April 9, 2003 for $1,000,000.00 instead of the $1,500,000.00 COPE requested for the project. A kickoff meeting with the California Energy Commission (CEC) was held on Monday, April 14, 2003, in their Sacramento, CA offices. Mark Carl, IOGCC project manager for the DOE grant, attended this meeting, along with Bob Fickes with COPE, Edan Prabhu, Mike Merlo and CEC officials. The change in funding by the CEC required a modification in the scope of work and an amended form DOE F 4600.1. The modifications were completed and the IOGCC received approval to commence work on the project on May 9, 2003. On May 29, 2003, Virginia Weyland with DOE/NETL, Mark Carl with IOGCC, and Bob Fickes with COPE, Edan Prabhu and Mike Merlo, consultants with COPE, participated in a teleconference kick-off meeting. During May, 2003, COPE canvassed its membership for potential locations for the four test sites. They received a very good response and have identified at least two potential sites for each of the four test sites. COPE has been obtaining gas samples from the various potential lease sites for analyses to verify the chemical properties analyses which the oil and gas producers provided during the initial contact period. The St. James project located at 814 W. 23 rd Street in Los Angeles, California, was selected as the first test site for the project. A Project Advisory Committee (PAC) was established in May, 2003. The following representatives from each of the following areas of expertise comprise the PAC membership. Acquisition of permits for the initial test site has required drawn out negotiations with CEC which has hindered progress on the technical aspects of the project. The technical aspects will begin aggressively beginning in October, 2003. The Southern California Air Quality Management District (SCAQMD) donated three Capstone micro-turbines to the project. These micro-turbines will be utilized at the St. James Project site located in Los Angeles

  2. Synergistic Assessment of Sustained Casing Pressure on Oil Well

    Directory of Open Access Journals (Sweden)

    Darren Wong Vun Nyap

    2013-05-01

    Full Text Available The current research is based on modeling approach, where the objective is to develop a series of computer codes with the reference of existing pressure bleed-off time mathematical models. The results generated from the model are based on the three parameters: temperature, type of gases filled in annulus and depth of well. These three parameters can affect pressure bleed-off time in well’s annulus, with the fixed size of needle valve. Using this model generated from Wolfram Mathematical 8.0, it is enable to notify engineer to receive an early sign of warning if the well is suspected to leakage. Meanwhile, based on the matching process of field data and modeled data, field engineers will be able to aware and determine whether the occurrence of annular pressure is due to thermal induced annular pressure buildup or it is because of leakage in well components. The SCP well will eventually loss in production, caused severe failure in well’s integrity.

  3. Drilling fluid for the super-deep Well Mashen-1%马深1井超深井钻井液技术

    Institute of Scientific and Technical Information of China (English)

    罗人文; 龙大清; 王昆; 范建国; 吕佳; 白晶

    2016-01-01

    Well Mashen-1 is a key vertical well deployed in northeastern Sichuan by SINOPEC for preliminary exploration. Boast-ing of a TD of 8 418 m, it is the deepest land well drilled in Asia. The fourth and fifth spud-in intervals were drilled at depth of 6 225.4~8 418 m with bottom-hole temperature up to 175 ℃. Accordingly, these intervals have problems related to high-temperature pollu-tion, sidewall instability in mud shale, acidic pollution and sand-carrying. Generally speaking, properties of conventional drilling fluid may not satisfy demands for routine operation. With consideration of these technical challenges, optimized materials and formula were deployed to develop KCl polyamine sulfonated drilling fluid system and temperature -resistant polysulfonate drilling fluid system. Test results indicate that KCl polyamine sulfonated drilling fluid has outstanding inhibition capabilities and can endure temperature up to 200 ℃. In addition, highly matured processing technologies for drilling fluids in super deep well have been developed. Field application results show that the well diameter has been enlarged by approximately 3.1% during the fourth spud-in and 5.1% in the fifth spud-in. Since these technologies can effectively cope with the challenges in drilling fluid for super deep wells, they can be promoted for more extensive application.%马深1井是中石化部署在川东北地区的一口重点预探直井,完钻井深8418 m。本井四开、五开井段6225.4~8418.0 m,井底温度高达175℃,存在高温污染、泥页岩井壁失稳、酸根污染以及携砂问题,常规钻井液性能已无法满足正常施工要求。鉴于以上技术难点,通过材料优选、配方优化,成功研制了 KCl 聚胺磺化钻井液体系和抗高温聚磺钻井液体系。经过体系验证:KCl 聚胺磺化钻井液具有良好的抑制能力;抗高温聚磺钻井液体系抗温达200℃。同时,在应用过程中形成了成熟的超深井钻井液

  4. 一种新型的油包水合成基钻井液%A New Type Water-in-oil Synthetic Drilling Fluid

    Institute of Scientific and Technical Information of China (English)

    胡兵; 欧阳传湘; 林飞; 赵春燕

    2016-01-01

    我国页岩气资源勘探开发已全面铺开.页岩失稳坍塌是目前困扰中国页岩气水平井大规模钻探的关键因素之一.合成基钻井液因其强抑制性强,在国外被广泛用于页岩气水平井钻井.借鉴国外相关经验,设计实验优选出油包水合成基钻井液的配方:矿物油(OA)+白油(OB)+水+3.0%乳化剂(纳米级 SiO2)+1.6%醋酸钾+1.0%有机土+3.0%降滤失剂+2.0%润湿剂+重晶石.以在实验室内合成低毒、价廉的矿物油 OA 和白油(OB)为基础油不仅能够降低成本,而且可以生物降解,对环境污染小.采用纳米级 SiO2做乳化剂,不仅有很好的粘结性、耐高温性、成膜性,而且对高速搅拌下产生的气泡有一定的消泡作用.采用醋酸钾替代氯化钙作为水相抑制剂,既增强了体系的抑制性又简化了配制工艺.该钻井液体系加重至 2.40 g/cm3的流变性能良好,破乳电压较高;在 130 ℃条件下热滚老化后流变性及破乳电压变化都不大.该体系很适合用于高地层压力梯度的四川盆地页岩Ⅰ区块(下志留统龙马溪组下部—上奥陶统五峰组约 86 m 层段)含气泥页岩段目的层的开发.其良好的润滑性能也有利于在该区块进行大位移水平井开发.%Exploration and development of shale gas resources has been in full swing. Shale instability collapse is currently plaguing one of the key factors in Chinese shale gas drilling. Synthetic drilling fluids are widely used in overseas shale gas horizontal drilling because of strong inhibition. Based on foreign experiences, through design experiments, preferable synthetic oil-in-water formulation of drilling fluid was obtained as follows: mineral oil (OA) +white oil (OB) + water + 3.0% emulsifier (nano-SiO2) + 1.6% potassium acetate + 1.0% + 3.0% organic soil fluid loss additive + 2.0% wetting agent + barite. Using inexpensive OB and OA with low toxicity can reduce costs, and they are biodegradable and have lower pollution

  5. Oil Resources Potential and Exploration of Ordos Basin

    Institute of Scientific and Technical Information of China (English)

    Yang Hua; Luo Anxiang; Fu Jinhua; Xi Shengli

    2007-01-01

    @@ Ordos Basin has experienced nearly a century of oil-gas exploration since China's first oil exploratory well (Yan-1 well) was drilled in 1907 in Yanchang County, Shaanxi Province. A good prospect for sustained and steady development of oil and gas was thereby opened based on the efforts made by generations of petroleum geologists and oil workers.

  6. Drilling to Supercritical Conditions: the Iceland Deep Drilling Project (IDDP).

    Science.gov (United States)

    Elders, W. A.; Fridleifsson, G. O.; Saito, S.

    2001-05-01

    Geothermal wells produce mixtures of water and steam in the range 200-350 C, however the high cost of drilling and completing these wells relative to the cost of oil and gas wells is a hindrance to the geothermal industry worldwide. Rather than trying only to reduce this cost, the Icelandic Deep Drilling Project (IDDP) is trying the approach of increasing the power output per well. Funded by a consortium of energy companies in Iceland, the IDDP plans to drill a series of boreholes, to depths greater than 4 to 5 km. The aim is to produce hydrothermal fluids systems at temperatures of 400-500 C, and to investigate the technical and economic aspects of producing supercritical fluids for use in power generation and other energy intensive processes, such as mineral recovery. The first phase feasibility and site selection study began in March 2001 and drilling of the first deep well is expected to begin in 2003. The IDDP faces difficult technical challenges to drill, complete, sample and maintain wells under hot, and potentially acid, conditions. However the IDDP also presents the opportunity to investigate very high-temperature hydrothermal regimes that have rarely been available for direct study. It will address important scientific issues, ranging from the coupling of magmatic and hydrothermal systems, supercritical phenomena, the transition from brittle to ductile behavior at relatively shallow depths, to land based analogues of submarine hot springs, the black smokers of the mid-ocean ridges. Fortunately, the IDDP industrial consortium is willing, or even anxious, to integrate its engineering activities with scientific investigations. The consortium will seek international participation by scientists and engineers to formulate a strategy to achieve both the engineering and scientific goals of the IDDP.

  7. Analysis of Efficiency of Drilling of Large-Diameter Wells With a Profiled Wing Bit / Badania Efektywności Wiercenia Studni Wielkośrednicowych Świdrem Skrawającym z Profilowanymi Skrzydłami

    Science.gov (United States)

    Macuda, Jan

    2012-11-01

    In Poland all lignite mines are dewatered with the use of large-diameter wells. Drilling of such wells is inefficient owing to the presence of loose Quaternary and Tertiary material and considerable dewatering of rock mass within the open pit area. Difficult geological conditions significantly elongate the time in which large-diameter dewatering wells are drilled, and various drilling complications and break-downs related to the caving may occur. Obtaining higher drilling rates in large-diameter wells can be achieved only when new cutter bits designs are worked out and rock drillability tests performed for optimum mechanical parameters of drilling technology. Those tests were performed for a bit ø 1.16 m in separated macroscopically homogeneous layers of similar drillability. Depending on the designed thickness of the drilled layer, there were determined measurement sections from 0.2 to 1.0 m long, and each of the sections was drilled at constant rotary speed and weight on bit values. Prior to drillability tests, accounting for the technical characteristic of the rig and strength of the string and the cutter bit, there were established limitations for mechanical parameters of drilling technology: P ∈ (Pmin; Pmax) n ∈ (nmin; nmax) where: Pmin; Pmax - lowest and highest values of weight on bit, nmin; nmax - lowest and highest values of rotary speed of bit, For finding the dependence of the rate of penetration on weight on bit and rotary speed of bit various regression models have been analyzed. The most satisfactory results were obtained for the exponential model illustrating the influence of weight on bit and rotary speed of bit on drilling rate. The regression coefficients and statistical parameters prove the good fit of the model to measurement data, presented in tables 4-6. The average drilling rate for a cutter bit with profiled wings has been described with the form: Vśr= Z ·Pa· nb where: Vśr- average drilling rate, Z - drillability coefficient, P

  8. Application of ALD Images and Caliper Data for the breakout analysis from the wells which were drilled in the Caspian Sea of the Azerbaijan Republic

    Science.gov (United States)

    Amirov, Elnur

    2016-04-01

    Wellbore instability while drilling, trip in or trip out can be cause of nonproductive time (NPT). Mainly this is the drilling surprises often encountered while drilling, trip in or trip out which were not predicted in advance, monitored, interpreted or recognized properly, which can give rise to wellbore instability problems. These surprises include also formation tops, overpressure zones occurring at different depths than predicted and the presence of unexpected faults or other fractured/fissile/compartmentalization zones. In general while drilling the wells, downhole PWD data cannot be very useful for understanding wellbore stability. Much of what we can use is indirect measurements such as torque and drag observations, rpm, vibrations, cavings, annular pressure measurements and etc. In order to understand what is going on in the subsurface and therefore mitigate the wellbore instability problems, we need more information from LWD (logging while drilling) tools. In order to monitor and get direct observations of the state of the borehole we need to determine where, how and in which direction the wellbore is failing and enlargement is taking place. LWD calipers and wellbore Azimuthal Lithodensity Images can provide such information for breakout analysis while drilling, trip in and trip out activity. The modes of wellbore instability can be generated in different ways and through different mechanisms. Therefore these zones of breakout can be potentially identified by the ALD imaging and LWD caliper tools. Instability can be governed by a combination of factors such as: the strength of the rock, the subsurface stress field, maximum and minimum horizontal stresses, pre-existing planes of weakness, the angle of the wellbore which intersects with these planes of weakness and chemical reaction of the rock (minerals) with the drilling fluid. Compressional failure (breakout) of an isotropic rock can occur when the compressive stresses around the borehole exceed the

  9. Microhole Drilling Tractor Technology Development

    Energy Technology Data Exchange (ETDEWEB)

    Western Well Tool

    2007-07-09

    In an effort to increase the U.S. energy reserves and lower costs for finding and retrieving oil, the USDOE created a solicitation to encourage industry to focus on means to operate in small diameter well-Microhole. Partially in response to this solicitation and because Western Well Tool's (WWT) corporate objective to develop small diameter coiled tubing drilling tractor, WWT responded to and was awarded a contract to design, prototype, shop test, and field demonstrate a Microhole Drilling Tractor (MDT). The benefit to the oil industry and the US consumer from the project is that with the MDT's ability to facilitate Coiled Tubing drilled wells to be 1000-3000 feet longer horizontally, US brown fields can be more efficiently exploited resulting in fewer wells, less environmental impact, greater and faster oil recovery, and lower drilling costs. Shortly after award of the contract, WWT was approached by a major oil company that strongly indicated that the specified size of a tractor of 3.0 inches diameter was inappropriate and that immediate applications for a 3.38-inch diameter tractor would substantially increase the usefulness of the tool to the oil industry. Based on this along with an understanding with the oil company to use the tractor in multiple field applications, WWT applied for and was granted a no-cost change-of-scope contract amendment to design, manufacture, assemble, shop test and field demonstrate a prototype a 3.38 inch diameter MDT. Utilizing existing WWT tractor technology and conforming to an industry developed specification for the tool, the Microhole Drilling Tractor was designed. Specific features of the MDT that increase it usefulness are: (1) Operation on differential pressure of the drilling fluid, (2) On-Off Capability, (3) Patented unique gripping elements (4) High strength and flexibility, (5) Compatibility to existing Coiled Tubing drilling equipment and operations. The ability to power the MDT with drilling fluid results in a

  10. 适用于致密气藏钻完井的新型超级13Cr油钻杆管材性能测试%Performance test of a new super 13Cr oil drill pipe used for tight gas reservoir drilling and complication

    Institute of Scientific and Technical Information of China (English)

    曾德智; 田刚; 施太和; 侯铎; 贾华明; 卢强; 赵鹏

    2014-01-01

    A new high strength super 13Cr oil drill pipe was developed for tight gas reservoir exploitation in Tarim oilfield .This paper studies the tensile property and impact property of S135 dirll pipe and new super 13Cr oil drill pipe by a material tensile testing machine and a instrumen-ted impact testing machine respectively .Their corrosion resistance to CO2 is also studied through high temperature and high pressure autoclave test .The results show that the ultimate strength of the new super 13Cr steel reaches 976 MPa ,with the yielding strength 937 MPa and elongation 19 .0% .Its impact energy reaches 162 .82 J .Compared with S135 steel ,the new super 13Cr steel has similar strength property and better impact property .Under the test condition ,the corrosion rate of the super 13Cr steel is 0 .003 6 mm/a in gas phase and 0 .039 4 mm/a in liquid phase . Therefore ,the new super 13Cr oil drill pipe can meet the requirement of drilling and well compli-cation .The new oil drill pipe could provide support for tight gas reservoir nitrogen drilling and well complication .%为满足塔里木致密气藏氮气钻完井需求,研制了一种新型高强度超级13Cr油钻杆。采用M TS试验机对新型超级13Cr油钻杆和S135钻杆的强度性能进行了对比测试;采用示波冲击试验机对新型超级13Cr油钻杆和S135钻杆的冲击性能进行了对比测试;采用高温高压釜对新型超级13Cr油钻杆和S135钻杆的耐CO2腐蚀性能进行了对比测试。结果表明:新型超级13Cr油钻杆具有良好力学性能和耐腐蚀性能,其屈服强度937 M Pa、抗拉强度976 M Pa、延伸率为21.5%、室温冲击功162.82 J。其拉伸性能与S135接近,冲击性能明显优于S135;模拟工况下,新型超级13C r油钻杆气相腐蚀速率0.0036 m m/a、液相腐蚀速率0.0394 m m/a。因此,新型超级13C r油钻杆既能满足钻井的需要又能满足完井开采的要求,可为含C O 2致密砂岩气田氮气钻完井作业提供支持。

  11. Oil and Gas Wells in the Wyoming Basins (8/31/2005)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — A complete set of wells associated with oil, natural gas, and coal bed natural gas development in the western states as of August 31, 2005. This is a static dataset...

  12. Map service: Oil and gas wells for the Wyoming Landscape Conservation Initiative (WLCI), southwestern Wyoming

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map service was created to assemble oil and gas well information for a comprehensive inventory of energy data pertinent to the Wyoming Landscape Conservation...

  13. Oil and gas wells data for the Wyoming Landscape Conservation Initiative (WLCI), southwestern Wyoming

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This feature class was created to assemble oil and gas well information for a comprehensive inventory of energy data pertinent to the Wyoming Landscape Conservation...

  14. Sweet lake geopressured-geothermal project, Magma Gulf-Technadril/DOE Amoco Fee. Annual report, December 1, 1979-February 27, 1981. Volume I. Drilling and completion test well and disposal well

    Energy Technology Data Exchange (ETDEWEB)

    Rodgers, R.W. (ed.)

    1982-06-01

    The Sweet lake site is located approximately 15 miles southeast of Lake Charles in Cameron Parish, Louisiana. A geological study showed that the major structure in this area is a graben. The dip of the beds is northwesterly into the basin. A well drilled into the deep basin would find the target sand below 18,000', at high pressures and temperatures. However, since there is no well control in the basin, the specific site was chosen on the 15,000' contour of the target sand in the eastern, more narrow part of the garben. Those key control wells are present within one mile of the test well. The information acquired by drilling the test well confirmed the earlier geologic study. The target sand was reached at 15,065', had a porosity of over 20% and a permeability to water of 300 md. The original reservoir pressure was 12,060 psi and the bottom hole temperature 299{sup 0}F. There are approximately 250 net feet of sand available for the perforation. The disposal well was drilled to a total depth of 7440'.

  15. Structure, mineralogy and microbial diversity of geothermal spring microbialites associated with a deep oil drilling in Romania

    Directory of Open Access Journals (Sweden)

    Cristian eComan

    2015-03-01

    Full Text Available Modern mineral deposits play an important role in evolutionary studies by providing clues to the formation of ancient lithified microbial communities. Here we report the presence of microbialite-forming microbial mats in different microenvironments at 32ºC, 49ºC and 65ºC around the geothermal spring from an abandoned oil drill in Ciocaia, Romania. The mineralogy and the macro- and microstructure of the microbialites were investigated, together with their microbial diversity based on a 16S rRNA gene amplicon sequencing approach. The calcium carbonate is deposited mainly in the form of calcite. At 32ºC and 49ºC, the microbialites show a laminated structure with visible microbial mat-carbonate crystal interactions. At 65ºC, the mineral deposit is clotted, without obvious organic residues. Partial 16S rRNA gene amplicon sequencing showed that the relative abundance of the phylum Archaea was low at 32ºC (1%. The dominant bacterial groups at 32ºC were Cyanobacteria, Gammaproteobacteria, Firmicutes, Bacteroidetes, Chloroflexi, Thermi, Actinobacteria, Planctomycetes and Defferibacteres. At 49ºC, there was a striking dominance of the Gammaproteobacteria, followed by Firmicutes, Bacteroidetes, and Armantimonadetes. The 65ºC sample was dominated by Betaproteobacteria, Firmicutes, [OP1], Defferibacteres, Thermi, Thermotogae, [EM3] and Nitrospirae. Several groups from Proteobacteria and Firmicutes, together with Halobacteria and Melainabacteria were described for the first time in calcium carbonate deposits. Overall, the spring from Ciocaia emerges as a valuable site to probe microbes-minerals interrelationships along thermal and geochemical gradients.

  16. Structure, mineralogy, and microbial diversity of geothermal spring microbialites associated with a deep oil drilling in Romania.

    Science.gov (United States)

    Coman, Cristian; Chiriac, Cecilia M; Robeson, Michael S; Ionescu, Corina; Dragos, Nicolae; Barbu-Tudoran, Lucian; Andrei, Adrian-Ştefan; Banciu, Horia L; Sicora, Cosmin; Podar, Mircea

    2015-01-01

    Modern mineral deposits play an important role in evolutionary studies by providing clues to the formation of ancient lithified microbial communities. Here we report the presence of microbialite-forming microbial mats in different microenvironments at 32°C, 49°C, and 65°C around the geothermal spring from an abandoned oil drill in Ciocaia, Romania. The mineralogy and the macro- and microstructure of the microbialites were investigated, together with their microbial diversity based on a 16S rRNA gene amplicon sequencing approach. The calcium carbonate is deposited mainly in the form of calcite. At 32°C and 49°C, the microbialites show a laminated structure with visible microbial mat-carbonate crystal interactions. At 65°C, the mineral deposit is clotted, without obvious organic residues. Partial 16S rRNA gene amplicon sequencing showed that the relative abundance of the phylum Archaea was low at 32°C (1%. The dominant bacterial groups at 32°C were Cyanobacteria, Gammaproteobacteria, Firmicutes, Bacteroidetes, Chloroflexi, Thermi, Actinobacteria, Planctomycetes, and Defferibacteres. At 49°C, there was a striking dominance of the Gammaproteobacteria, followed by Firmicutes, Bacteroidetes, and Armantimonadetes. The 65°C sample was dominated by Betaproteobacteria, Firmicutes, [OP1], Defferibacteres, Thermi, Thermotogae, [EM3], and Nitrospirae. Several groups from Proteobacteria and Firmicutes, together with Halobacteria and Melainabacteria were described for the first time in calcium carbonate deposits. Overall, the spring from Ciocaia emerges as a valuable site to probe microbes-minerals interrelationships along thermal and geochemical gradients.

  17. Optimization of organo clay production for applications in based oil drilling fluid; Otimizacao do processo de organofilizacao para aplicacoes em fluidos de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Heber S.; Martins, Alice B.; Costa, Danubia L. da; Ferreira, Heber C.; Neves, Gelmires de A.; Melo, Tomas J.A. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Teixeira Neto, Erico [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)

    2008-07-01

    The organophilic clays are widely used as an agent dispersed in the composition of oil based drilling fluids. The organophilic clays are gotten from bentonite clays treated, in watery way, with ionic surfactants, that are adsorbed in the surface of interlayer of the clays, re-covered them with a organic layer. A fundamental stage of production of the organophilic clays is the dispersion of bentonite clays, in way that variables like: speed of agitation, temperature and time of cure, influences directly in plastic and apparent viscosities of these dispersions, together with other variables of organophilization process, like, temperature and time of cure of organophilization, has direct influence in efficiency of the organophilization process. This work considers a study of these variable, using bentonite clays: Brasgel PA{sup R} and Cloisite Na{sup +R}, treated with the ionic surfactant Praepagem WB{sup R}. The organophilic clays gotten had been characterized by rays X diffraction, Foster's swelling, and the results were compared with the commercial organophilic clay VG-69{sup R}, industrially treated with ionic surfactant. Viscosities plastic and apparent of the dispersions had been measured in the midst of organic dispersant diesel oil used to obtain the oil based drilling fluids. Preliminary results of Foster's swelling and preparation of fluids show that the clays have affinity with the means liquid organic dispersants, and the fluids meet specifications of PETROBRAS (N-22581-1997 and N-2259 to 1997) for use in the of diesel oil based drilling fluids. (author)

  18. Evolution of Hydrocarbon-Degrading Microbial Communities in the Aftermath of the Deepwater Horizon Oil Well Blowout in the Gulf of Mexico

    Science.gov (United States)

    Andersen, G.; Dubinsky, E. A.; Chakraborty, R.; Hollibaugh, J. T.; Hazen, T. C.

    2012-12-01

    The Deepwater Horizon oil spill created large plumes of dispersed oil and gas that remained deep in the water column and stimulated growth of several deep-sea bacteria that can degrade hydrocarbons at cold temperatures. We tracked microbial community composition before, during and after the 83-day spill to determine relationships between microbial dynamics, and hydrocarbon and dissolved-oxygen concentrations. Dominant bacteria in plumes shifted drastically over time and were dependent on the concentration of hydrocarbons, and the relative quantities of insoluble and soluble oil fractions. Unmitigated flow from the wellhead early in the spill resulted in the highest concentrations of oil and relatively more n-alkanes suspended in the plume as small oil droplets. These conditions resulted in near complete dominance by alkane-degrading Oceanospirillales, Pseudomonas and Shewanella. Six-weeks into the spill overall hydrocarbon concentrations in the plume decreased and were almost entirely composed of BTEX after management actions reduced emissions into the water column. These conditions corresponded with the emergence of Colwellia, Pseudoalteromonas, Cycloclasticus and Halomonas that are capable of degrading aromatic compounds. After the well was contained dominant plume bacteria disappeared within two weeks after the spill and transitioned to an entirely different set of bacteria dominated by Flavobacteria, Methylophaga, Alteromonas and Rhodobacteraceae that were found in anomalous oxygen depressions throughout August and are prominent degraders of both high molecular weight organic matter as well as hydrocarbons. Bio-Sep beads amended with volatile hydrocarbons from MC-252 oil were used from August through September to create hydrocarbon-amended traps for attracting oil-degrading microbes in situ. Traps were placed at multiple depths on a drilling rig about 600-m from the original MC-252 oil spill site. Microbes were isolated on media using MC-252 oil as the sole

  19. Counter-Rotating Tandem Motor Drilling System

    Energy Technology Data Exchange (ETDEWEB)

    Kent Perry

    2009-04-30

    Gas Technology Institute (GTI), in partnership with Dennis Tool Company (DTC), has worked to develop an advanced drill bit system to be used with microhole drilling assemblies. One of the main objectives of this project was to utilize new and existing coiled tubing and slimhole drilling technologies to develop Microhole Technology (MHT) so as to make significant reductions in the cost of E&P down to 5000 feet in wellbores as small as 3.5 inches in diameter. This new technology was developed to work toward the DOE's goal of enabling domestic shallow oil and gas wells to be drilled inexpensively compared to wells drilled utilizing conventional drilling practices. Overall drilling costs can be lowered by drilling a well as quickly as possible. For this reason, a high drilling rate of penetration is always desired. In general, high drilling rates of penetration (ROP) can be achieved by increasing the weight on bit and increasing the rotary speed of the bit. As the weight on bit is increased, the cutting inserts penetrate deeper into the rock, resulting in a deeper depth of cut. As the depth of cut increases, the amount of torque required to turn the bit also increases. The Counter-Rotating Tandem Motor Drilling System (CRTMDS) was planned to achieve high rate of penetration (ROP) resulting in the reduction of the drilling cost. The system includes two counter-rotating cutter systems to reduce or eliminate the reactive torque the drillpipe or coiled tubing must resist. This would allow the application of maximum weight-on-bit and rotational velocities that a coiled tubing drilling unit is capable of delivering. Several variations of the CRTDMS were designed, manufactured and tested. The original tests failed leading to design modifications. Two versions of the modified system were tested and showed that the concept is both positive and practical; however, the tests showed that for the system to be robust and durable, borehole diameter should be substantially larger

  20. Safety Management of Oil and Gas Drilling of High Sulfur Content in Northeastern Sichuan Region%川东北地区高含硫油气井钻井安全管理

    Institute of Scientific and Technical Information of China (English)

    邹汉杰; 李和焱

    2012-01-01

    Eastern Sichuan regions ate based on producing natural gas, which exist in the characteristics, such as high pressure, high sulfur content and deep gas layer burying, coupled with great difficulty of well control technology of oil drilling, which is called the most construction risk in China's onshore oil and gas drilling. Hydrogen sulfide is a colorless, poisonous and strongly acidic gases, once leaking caused by out of control for blowout, it will result in incalculable losses.%川东地区主要以产天然气为主,普遍存在的高压、高含硫、气层埋藏深的特点,石油钻井井控技术工作的难度之大,堪称中国陆上油气钻井施工风险之最.硫化氢是一种无色、剧毒、强酸性气体,一旦出现井喷失控硫化氢泄露,将造成不可估量的损失.

  1. Understandings on Drilling Technology for Long Horizontal Section Wells%对长水平段水平井钻井技术的几点认识

    Institute of Scientific and Technical Information of China (English)

    韩来聚; 牛洪波

    2014-01-01

    为进一步明晰长水平段水平井与大位移井及常规水平井的差异,探讨相关钻井技术发展思路,进行了长水平段水平井技术特性分析。经分析、对比,认为三者之间的主要区别为:长水平段水平井重点解决的摩阻扭矩问题在常规水平井中不突出;其主要技术目标和形态特征是“相对较长”的水平段,但很多情况下不属于大位移井定义的范畴;相关钻井技术主要关注井斜角为86°以上“长”井段的作业能力,有别于大位移井以水平位移为目标的钻井完井能力。基于上述认识,提出了可表征长水平段水平井形态特征的初步定义,并从完善钻井设计基础理论、创新长水平段提速工艺和经济钻进模式等方面给出了详细建议。%In order to further clarify the differences among long horizontal section wells ,extended reach wells and conventional horizontal wells ,and explore drilling technologies and relative developing strategy for long horizontal section wells ,the technical characteristics of these kinds of wells were analyzed .The a-nalysis and comparison shows the main differences among the three kinds of wells are as follows :the prob-lem of drag and torque in long horizontal section wells is not serious in conventional horizontal wells ;long horizontal section wells feature a long horizontal section ,which is beyond the range of extended reach well in many cases ;the relative technologies have been focused on the drilling ability for the long horizontal sec-tion with deviation of more than 86° ,it is different from the drilling and completion capability in extended reach wells that aimed at getting a long displacement .Based on the findings above ,preliminary definition of long horizontal section wells was presented ,and some specific suggestions on basic drilling design theory , drilling technology for improving ROP of long horizontal section and economic drilling model have

  2. Influence of non-edible vegetable based oil as cutting fluid on chip, surface roughness and cutting force during drilling operation of Mild Steel

    Science.gov (United States)

    Susmitha, M.; Sharan, P.; Jyothi, P. N.

    2016-09-01

    Friction between work piece-cutting tool-chip generates heat in the machining zone. The heat generated reduces the tool life, increases surface roughness and decreases the dimensional sensitiveness of work material. This can be overcome by using cutting fluids during machining. They are used to provide lubrication and cooling effects between cutting tool and work piece and cutting tool and chip during machining operation. As a result, important benefits would be achieved such longer tool life, easy chip flow and higher machining quality in the machining processes. Non-edible vegetable oils have received considerable research attention in the last decades owing to their remarkable improved tribological characteristics and due to increasing attention to environmental issues, have driven the lubricant industry toward eco friendly products from renewable sources. In the present work, different non-edible vegetable oils are used as cutting fluid during drilling of Mild steel work piece. Non-edible vegetable oils, used are Karanja oil (Honge), Neem oil and blend of these two oils. The effect of these cutting fluids on chip formation, surface roughness and cutting force are investigated and the results obtained are compared with results obtained with petroleum based cutting fluids and dry conditions.

  3. A highly efficient, stable, durable, and recyclable filter fabricated by femtosecond laser drilling of a titanium foil for oil-water separation

    Science.gov (United States)

    Ye, Sen; Cao, Qiang; Wang, Qingsong; Wang, Tianyuan; Peng, Qing

    2016-11-01

    It has been a long standing challenge to efficiently separate oil and water since prehistoric times, and now it has become even more desirable in oily wastewater purification and oil spill cleanup. Here we introduce a super oil-water separation filter with superhydrophilicity and underwater superoleophobicity, fabricated using femtosecond laser micro-hole drilling of a titanium foil. Such a simply-made filter, without any modification, can achieve a separation efficiency exceeding 99% in eight typical oil-water mixtures. It remains highly efficient after 40 cycles of recycling and after suffering erosion by corrosive media. Furthermore, the used filter, polluted with oil, could be recovered by ultraviolet illumination. The flux of filtered water is tunable by simply selecting the aperture of the microhole or the spacing between adjacent microholes. Such advanced functionality is due to roughness and the TiO2 layers on the ablated surface during fabrication. With superhydrophilic and superoleophobic surfaces, this oil-water filer is also suitable for applications in anti-fouling, anti-smudge, anti-fog, and self-cleaning.

  4. Magnet ranging calculation method of twin parallel horizontal wells steerable drilling%双水平井导向钻井磁测距计算方法

    Institute of Scientific and Technical Information of China (English)

    刁斌斌; 高德利; 吴志永

    2011-01-01

    对旋转磁场测距导向系统应用于双水平井导向钻井中的工作原理进行阐述,把旋转磁短节看成旋转的磁偶极子,推导旋转磁短节周围空间远场的磁场分布规律,并在此基础上论证探管记录的轴向磁信号两个振幅最大值之间的距离等于双水平井水平段间距,导出根据探管探测的磁信号计算双水平井水平段相对方位的方法.根据测距导向计算方法,利用旋转磁场测距导向系统可以引导正钻井沿着与已钻井水平段平行的路径钻进.%The operating principle of rotating magnet ranging service system for drilling twin parallel horizontal wells was introduced. The rotating magnetic sub was characterized by a rotating magnetic dipole, and the far magnetic field distribution of the rotating magnetic sub was deduced. According to the far magnetic field distribution of rotating magnetic sub, the conclusion that the distance between the two axial field amplitude maxima equals the separation between the twin parallel horizontal wells was demonstrated, and the calculation method for determining the direction from one well of twin parallel horizontal wells to another was obtained as a function of the magnetic signals sensed by probe. According to the ranging calculation method, the rotating magnet ranging service system can be used to drill a well being drilled on a precise predetermined path, which is parallel to an existing well.

  5. 高温小井眼长水平段钻井液技术%Drilling Fluid Technology of Well LongshenlHl

    Institute of Scientific and Technical Information of China (English)

    张新发; 周保国; 刘金利; 王发利; 郭新辉

    2012-01-01

    Gas exists richly in fractured volcanic rock of the Yingcheng group in Yingtai gas field of Jilin oilfield, and the reservoir is deep with the highest temperature of 140 ℃. The well LongshenlHl, located in this block, is drilled with some difficulties, such as long small horizontal section hole of 1,122 m with the finish drilled depth 4,048 m, big friction, high annulus pressure loss, low return velocity, hard carrying cuttings, long drilling period and many complex situations. Consequently, a kind of surfactant is optimized to improve lubricity, protect reservoirs and make wellbore stable. The application of this drilling fluid system with the surfactant shows that it can satisfy the demand of fast drilling of well Longshen1H1, which makes a record of the longest horizontal section well in Jilin oilfield.%吉林油田英台气田营城组裂缝性火山岩富含天然气,埋藏深,储层温度最高达140℃.该区块部署的评价井龙深1平1井属小井眼长水平段水平井,完钻井深为4048 m,1122m的小井眼长水平段钻进摩擦阻力大,环空压耗大、返速低,携屑难度大,钻井周期长,易引起井下复杂情况.因此,优选出了表面活性剂,可改善钻井液的润滑防卡能力、储层保护能力和稳定井壁能力.最终形成的抗高温聚合物钻井液在高温条件下具有较好的流变性能、润滑性能、抑制能力和储层保护效果,携屑能力强,滤失量小,满足龙深1平1并优快施工需求,实