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Sample records for chusho kigyo sozo

  1. Achievement report for fiscal 1998 on area consortium research and development business. Area consortium for venture business development by building base for small business (abuse double protected next generation card system based on steganography); 1998 nendo venture kigyo ikuseigata chiiki consortium kenkyu kaihatsu (chusho kigyo sozo kibangata). Steganography gijutsu wo riyoshita jisedaigata fusei shiyo taju boshi guard system no kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    A card system is developed using BPCS (Business Planning and Control System) steganography, with electronic data imbedded in the card. Under the system, the visual recognition of the user and the mechanical verification of the card are carried out simultaneously, with the card rejecting any abuse. In fiscal 1998, a system was built by way of trial, constituted of technologies of encoding, decoding, and packaging data into an IC (integrated circuit) card. A photograph of the user's face is attached to the card, the card carries an 8KB IC memory device, and the device stores data of the photograph of the user's face etc. A password has to be inputted before any data may be taken out. A customized key is required to display the imbedded personal data and, for the restoration of the key data, the personal key known only to the owner and the company key that is kept by the card managing company need to be collated with each other. Multiple checking is available for the prevention of abuse, which include the collation of face photographs, collation with display by inputting the password, and request for the customized key to confirm the presence of authority to read the imbedded personal data. (NEDO)

  2. Achievement report for fiscal 1998 on area consortium research and development business. Area consortium for venture business development by building base for small business (high-precision, real-time measurement of shapes, deformation, and distortion); 1998 nendo venture kigyo ikuseigata chiiki consortium kenkyu kaihatsu (chusho kigyo sozo kibangata). Koseido jitsujikan keijo henkei hizumi keisokuho no kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Measurements are analyzed by a Fourier transform phase shift method incorporating the 3-dimensional image processing technique developed at Wakayama University. The system is to exhibit micrometer-order accuracy in the measurement of shapes and nanometer-order accuracy in the measurement of flatness distribution on an object, is easy to handle at the working site, and is inexpensive, non-contact, high in accuracy, and totally automatic, capable of measuring shapes, deformation, movement, stress, and distortion. To be also developed is an inexpensive system easy to operate at the working site, which uses a measuring method based on the phase shift scan moire method, capable of non-contact real-time processing of 30 images per second. Studies are conducted to optimize the performance for higher speeds, studies are conducted to realize automation, higher speeds, and reduction in size, and prototypes will be built corresponding to different objects of measurement. Studies are to begin in connection with business applying the new technology, mass production, commercialization, and standardization. The initial goals have roughly been achieved, and development will continue. (NEDO)

  3. Achievement report for fiscal 1998 on area consortium research and development business. Area consortium for venture business development by building base for small business (computer-controlled PCM-aided constant-temperature cracking and multimetal-smelting Technology); 1998 nendo venture kigyo ikuseigata chiiki consortium kenkyu kaihatsu (chusho kigyo sozo kibangata). Computer seigyo ni yoru PCM koon seigyo bunkai obyobi multi smelting giho no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Treatment of domestically produced waste of electrical appliances is studied, for which an energy-efficient constant-temperature cracking unit (medium/low-temperature cracking furnace) working on the PCM (phase change material) technology and a multimetal smelter (high-temperature cracking furnace) are combined. The system is to recover, regenerate, and reuse the valuables efficiently at low cost without allowing any waste out, and a resources cycle is established beyond the thermal cycle, which will to promote the recycling of used resources. As one of promising PCM materials, Al-Si excellent in thermal response is selected, and kept at 578-579 degrees C for one hour. The result obtained indicates that, once the PCM is molten, homogenous conditions may be restored semipermanently by heating but supplementarily to cover the lost heat, and that therefore it is a promising candidate for a heat source. Data are also collected about temperature control and auxiliary materials to be injected, necessary for collection from the smelter, and some metal was recovered. With a PCM layer enclosing the heated material, a computer-aided automatic control system is realized capable of adjusting the temperature to stay at a constant level. (NEDO)

  4. Achievement report for fiscal 1998 on area consortium research and development business. Area consortium for venture business development by building base for small business (high-efficiency superhigh-accuracy grinding technology by nano-scale in-process measurement and control using novel grinding wheel); 1998 nendo venture kigyo ikuseigata chiiki consortium kenkyu kaihatsu (chusho kigyo sozo kibangata). Shingata kensaku toishi wo mochiita nano in-process keisoku seigyo ni yoru konoritsu choseimitsu kensaku kako gijutsu no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The aim is to develop a superflat grinding system for functional devices such as hard disks and magnetic heads. Cast iron powder is used as bonding material high in reacting with diamond for an increase in the anchoring power. A chemical reaction occurs to realize a strong bond between the two, producing a precision grinding wheel long in life and high in efficiency. A wheel with some hollows is also developed in which the grits have to bear more load because of the hollows, this achieving grinding efficiency five times higher than that of other types of the same grit size. A system is developed, provided with a constant pressure mechanism for the grinding direction and constant travel mechanism normal to the work surface. Using the constant pressure system, the grinding speed depends on the wheel grinding capability, and then the wheel is allowed to exhibits its best. The system suffers less clogging than the conventional ones. The specific grinding energy which is the index of the match between the wheel and the work may be determined, and this enables prompt condition optimization. It is proved that the wheel with hollows is remarkably higher in grinding capability than wheels of the same grit size on the market. The two are found to be alike in achieving top-class finish in terms of surface coarseness and flatness. (NEDO)

  5. Final report of `research on advanced uses of cast materials`; Chusho kigyo taisaku gijutsu tokubetsu kenkyu `chuzo zairyo no kodo riyo gijutsu ni kansuru kenkyu` shuryo hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    Tada, S.; Takahashi, T.; Abe, T. [Tohoku National Industrial Research Institute, Sendai (Japan)

    1997-03-31

    For the advanced utilization of casting iron, temperature differential austempering and partial austempering with the gradient mechanical properties of ADI (austempered ductile iron) by local electric method were experimentally investigated. For the former, gradient mechanical properties are obtained by giving temperature difference to the material in the process of austempering of casting iron, to add the strength and toughness. For the latter, mechanical properties are controlled by repeating partial austempering with changing the isothermal transformation condition by means of local electric method, to obtain the strength characteristics with appropriate balance. As a result of the former experiment, function gradient materials could be obtained with continuously changing internal mechanical properties. The fabricated material provided different properties depending on the direction of load. Radial crushing strength constant of the ring material depended on the treatment temperature of inside surface of the specimen. Fatigue and yield strengths can be simultaneously improved. As a result of the latter experiment, it was found that the mechanical properties can be improved at arbitrary part by the partial austempering. 13 refs., 25 figs., 4 tabs.

  6. Les sédiments mésozoïques et cénozoïques de mer Ionienne (campagne Escarmed 3 : escarpement de Malte, mont Alfeo et monts de Médine. Etude biostratigraphique : foraminifères, nannoplancton, microfaciès Mesozoic and Cenozoic Sediments of the Ionian Sea (Escarmed Campaigns: Malta Escarpment, Alfeo and Medina Seamounts. Biostratigraphic Analysis: Foraminifers, Nannoplankton and Microfacies

    Directory of Open Access Journals (Sweden)

    Group Escarmed

    2006-11-01

    Full Text Available La campagne Escarmed 3 succède à toute une série de prélèvements effectués par des navires français et italiens. Les paléoenvironnements mésozoïques et cénozoïques de quelques marges du bassin Ionien profond (Méditerranée orientale et plus particulièrement ceux de l'escarpement de Malte ont pu être reconstitués partiellement grâce à une étude biostratigraphique. Aux faciès de plate-forme du Trias et Lias inférieur-moyen succèdent, comme en Sicile, des séries pélagiques au Jurassique moyen et supérieur. Au Crétacé inférieur, lacunes ou érosions caractérisent la série de l'escarpement de Malte par opposition aux séries de plate-forme des monts de Médine. Dès l'Albien jusqu'au Miocène, la sédimentation est à dominance pélagique avec présence locale de dépôts circalittoraux et brèches à éléments de plate-forme (Maestrichtien, Eocène, Oligocène ou phénomènes d'érosion, voire hiatus (Cénomanien-Turonien. Les faciès franchement pélagiques du Pliocène succèdent à la phase d'érosion du Miocène supérieur. Enfin, on notera un magmatisme important accompagnant des phénomènes de distension dès le Jurassique supérieur. The Escarmed 3 coring and dredging campaign in the Ionian Sea comes after a series of similar surveys by French and Italian vessels. They made it possible to partially reconstruct the Mesozoic and Cenozoic paleoenvironments of several margins of the deep Ionian basin (Eastern Mediterranean, especially those of the Malta escarpment, on the basis of biostratigraphic analysis. Whereas a shallow-water environment prevailed during the Triassic and the Lower to Middle Lias period, pelagic facies are observed in the Middle-Upper Jurassic series of this area, just as has been found in Sicily. During the Lower Cretaceous, gaps or erosions characterize the Malta Escarpment, whereas the Medina seamounts are subject to continuous shelf sedimentation. From the Albian up to the Miocene

  7. Desiliconization process of hot metal at blast furnance casthouse. Koro chusho ni okeru yosen no tatsukei shori

    Energy Technology Data Exchange (ETDEWEB)

    Uchiyama, T.; Takeda, K.; Taguchi, S.; Shinohara, K.; Kato, H.; Matsumoto, T. (Kawasaki Steel Corp., Tokyo (Japan))

    1990-09-01

    The Kawasaki Steel has developed several types of desiliconization facilities at blast furnace runner and applied to blast furnaces according to their individual local conditions. In response to the restriction in the maximum feed rate and mass velocity of desiliconization reagent by the slag foaming and splash formations for the desiliconization method without slag removal at the casthouse, three methods, i.e., a top feed method, a blasting by one stage, and a blasting by two stages were developed, according to increases in the required feeding rate of the desiliconization reagent. In the case that the desiliconization slag is removed at the blast furnace runner, it was demonstrated that the injection method by use of an immersion lance was effective because of its high oxygen efficiency in desiliconization. An simulation model of desiliconization was also developed, and the effect of the lance shape on oxygen efficiency in desiliconization was evaluated. On the basis of the simulation results, the oxygen efficiency in desiliconization was able to be increased to 60% by the improvement of the injection conditions. 8 refs., 18 figs., 3 tabs.

  8. Changes in trade structure. Impacts of overseas advance on Japanese manufactures; Nihon kigyo no kaigai shinshutsu ni tomonau boeki kozo no henka. Seizogyo ni tsuite no jissho bunseki

    Energy Technology Data Exchange (ETDEWEB)

    Hoshino, Y.; Hattori, T. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1997-06-01

    The trend of overseas advance on recent Japanese manufactures and the change in trade structure were analyzed for each district and industry type to examine the impact of overseas advance on the trade structure. The rate of overseas production in the manufacturing industry significantly increased from 2.9% in 1980 to 8.6% in 1994. The spot manufacturer corporation that advanced into Asia has been recently activating the industrial trade. With the overseas advance of manufacturers, the trade in the same industry type has been growing prosperous between Japan and Asia. In the trade structure, the role of East Asia and capital goods has been rapidly expanding in weight. A remarkable change in structure is in progress. The income elasticities of exports vary depending on the district and item. The income elasticities of imports do not vary depending on the district more than for exports. The chemical product, iron steel, and electric machinery exports to Asia, and the general machinery exports to North America have a high export induced effect. The electric machinery imports from Asia have a high re-import effect. In 1990 to 1994, 79% of its trade surplus is caused by overseas production effects, and 27% by income effects. 7 refs., 8 figs., 18 tabs.

  9. Survey on the feasibility of simple waste energy systems in medium or small cities; Chusho toshi ni okeru kan`igata haikibutsu riyo energy system no kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For effective use of wastes, the concept of a waste utilization system suitable for local characteristics of the Kyushu district was surveyed. The amount, features and processing method of wastes were surveyed for every kind of wastes and every region. Characteristics of wastes themselves and their use technologies were surveyed to study the energy system concept, and the concept was selected mainly for simple middle or small-scale systems. Main wastes available as heat source showed distinctive distributions every region. The following seven concepts were thus selected: RDF (refuse derived fuel) energy system mainly using general wastes, RDF system using wood chips and agricultural plastic wastes, co-generation system by premixed combustion of chicken manure and combustion improver, premixed combustion of livestock manure and combustion improver, methane fermentation using livestock, distillery and starch wastes, and pyrolytic oil system or gas system using agricultural plastic wastes. Establishment of any systems is difficult only in single region because of their economic scale. The collection and storage methods of raw materials should be studied. 36 figs., 40 tabs.

  10. Instrumentation/control systems for small- to medium-size steel-making plants; Tekko setsubi chusho plant no keisoku seigyo system

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-01-10

    Fuji Electric has realized highly reliable and functional control systems by the dispersion type control system FOCUS, which uses the controller (ICS-2000) enjoying good reputation in controlling industrial plants for a long time and a personal computer with high windows operability, the former for controlling and the latter for MHI responsible for monitoring. The smelting process in a steel-making plant needs a highly reliable system for advanced control to ensure continuous operation. Fuji Electric delivered the FOCUS system to Kubota in 1998, as the smelting furnace instrumentation/control system for the cupola furnace. The system has been in service smoothly. Moreover, a total of four control systems have been delivered, 2 for steel-making furnaces and the other 2 for continuous casting. (NEDO)

  11. World scenario for energy industries (Problems and responses). ; Creating new values in fuels and restructuring the energy industries. Energy sangyo no sekai shinario (kadai to taio). ; Nenryo no shinkachi no sozo to energy sangyo no saikochiku

    Energy Technology Data Exchange (ETDEWEB)

    1992-03-05

    This paper describes the following matters on the future images of the energy industries: The following two scenarios may be drawn on the future world order from the changing signs seen in three regions of the geopolitical factors, international economies, and environmental problems : One is the world of mercantilism where several blocks are formed, with the economic power of each block regarded as the ultimate purpose. Trades within a block are executed according to the market principles, while trades between the blocks are operated politically. The energy industries in this case should face incessantly new rules and market restructuring. Another scenario is a coordination maintaining world where international cooperations are preferred to the common benefits. Affluent nations determine the necessity of global systems for trade and environmental problems, while less affluent nations are forced to coordinate with these determinations. In this case, the energy industries will face directly a cost rise associated with conversions to cleaner fuels and industrial restructuring. 8 figs.

  12. Fiscal 1995 survey of promotion of the geothermal development. Report on a usage feasibility test of a small scale geothermal binary cycle power generation system; 1995 nendo chinetsu kaihatsu sokushin chosa. Chusho chinetsu binary hatsuden system jissho shiken hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    In this survey, studies for popularization and practical utilization of small and medium size geothermal binary cycle power systems which assesses low and medium temperature geothermal resources were conducted, and studies for development of the system to be introduced for practical use and for promotion of the popularization were made. A study was carried out of preconditions and various conditions of a demonstrative test plant (100kW class, 500kW class) in view of the initial cost of the actual plant, and an analysis was made of the power generation cost. Acceptability of the demonstrative test plant (100kW class) was examined to analyze problems on the introduction. A thermodynamic analysis was made of the output of geothermal binary cycle power generation. Analysis/evaluation of the results of the 100kW demonstrative test plant were carried out in view of the operation results of the plant of the same kind, and checks/reviews were conducted of performance and reliability of the system, equipment simplification, etc. Inspection of the system was made in the stage of design/manufacture of the 500kW demonstrative test plant. Concerning the spread/expansion of the system, studied were multiple stage geothermal utilization and PR promotion method. 14 refs., 62 figs., 55 tabs.

  13. "Are Japanese Firms Becoming More Independent from Their Banks?: Evidence from the Firm-Level Data of the "Corporate Enterprise Quarterly Statistics," 1994-2009"

    OpenAIRE

    Miwa, Yoshiro

    2011-01-01

    The Ministry of Finance's "Corporate Enterprise Quarterly Statistics" (Hojin kigyo tokei kiho) is the only statistical source of well-balanced information about the financing behavior of Japanese firms. Indeed, there are few comparable sources available anywhere in the world. Using this firm-level data set from 1994 to 2009, the author investigates the financing behavior of Japanese firms with over \\10 million in paid-in capital. The conclusions contrast sharply with the conventional wisdom. ...

  14. Mesozoic diapirs at the eastern edge of Lord Howe Rise (southwest Pacific): ZoNéCo 5 cruiseMise en évidence de diapirs mésozoïques sur la bordure orientale de la ride de Lord Howe (Sud-Ouest Pacifique) : campagne ZoNéCo 5

    Science.gov (United States)

    Auzende, Jean-Marie; Beneton, Gérald; Dickens, Gerald; Exon, Neville; François, Caroline; Hodway, Dave; Juffroy, Fabien; Lafoy, Yves; Leroy, Alexandre; Van de Beuque, Sabrina; Voutay, Olivier

    2000-02-01

    The objective of the ZoNéCo 5 cruise on R/V L'Atalante was the bathymetrical and geological survey of the eastern edge of the Lord Howe Rise, a key structure between New Caledonia and the eastern margin of Australia. The acquired data better defines the relationships between the New Caledonia Basin and the Lord Howe Rise in an area which is the southern prolongation of the Fairway basin. This basin contains a thick sedimentary sequence ranging from Lower Cretaceous to the present day. This basin extends on more than 70 000 km 2. The main result of the cruise was the discovery of a Pre-Cretaceous or Cretaceous series including salt or mud diapirs. At about 600 m below the sea floor and coincident with the distribution of diapirs, an extensive BSR (Bottom Simulating Reflector) suggests the existence of a large gas hydrates deposit.

  15. Fiscal 1999 research report. Basic research for promotion of joint implementation programs (Comprehensive feasibility study on efficiency improvement of heat generation facility and heat network for district heating at middle and small cities in Moscow region, the Russian Federation - 2 model cities within the region); 1999 nendo Russia renpo Moscow shunai chusho toshi ni okeru chiiki danboyo netsu kyokyu shisetsu yusomo no koritsu kaizen keikaku sogo chosa hokokusho. Shunai 2 toshi wo model to suru

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The above-named effort aims to work out modification plans and to predict their energy saving, energy substituting, and greenhouse gas reduction effects, and thereby to scout out a project which will effectively utilize flexibility-ensuring 'joint implementation' for the attainment of greenhouse gas reduction levels defined at COP3 (Third Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change). The results of assessment of this project based on the outcome of the survey show that (1) there is necessity for the project and that the presence of needs to be urgently satisfied is clear, that (2) energy saving, energy substituting, and greenhouse gas reduction effects are proved to exist and that the project is therefore an appropriate candidate for an activity to be implemented jointly, that (3) Russian agencies concerned are strongly interested in the project and that a sufficiently cooperative system will be available toward implementation, and that (4) there is an extremely large room for energy saving in the district heating oriented heat supply business in Russia and that probabilities are quite high that natural gas-fired turbine cogeneration plants capable of improving overall energy efficiency will enjoy extensive diffusion. (NEDO)

  16. Evolution of the Northeastern Arabian Plate Margin and Shelf: Hydrocarbon Habitat and Conceptual Future Potential L'évolution géologique de la plate-forme arabe et de sa marge : répartition des hydrocarbures et concepts pour son potentiel futur

    Directory of Open Access Journals (Sweden)

    Beydoun Z. R.

    2006-11-01

    Full Text Available About 98% of the huge recoverable hydrocarbon reserves of the Arabian Plate are concentrated in the Northeastern Margin Shelf extending from NW Iraq through the Gulf to Central Oman. The plate tectonic evolution of this region is reviewed as background for its enormous hydrocarbon productivity. This is intimately linked to a near-continuous passive margin history and gentle subsidence of an extraordinarily wide epeiric shelf, which allowed repeated regional development of source rocks in large intra-shelf basins frequently in optimal juxtapositional relationships with good regional reservoirs and seals; these events are discussed. Although currently reported reserve figures relate to Mesozoic and Tertiary reservoirs, it is concluded that several pre-Mesozoic regional sources have generated enormous volumes of hydrocarbons, the bulk of which still await discovery in up-dip Paleozoic reservoirs, and that future ultimate recoverable reserves could conceivably double. Près de 98 % des énormes réserves récupérables d'hydrocarbures de la plaque arabique sont concentrés dans la marge nord-est qui s'étend du nord-ouest de l'Irak au centre d'Oman, à travers le Golfe. L'auteur passe en revue l'évolution tectonique de cette région, origine de son énorme productivité pétrolière. La passivité presque continue de cette marge, combinée à l'affaissement progressif d'un plateau épicontinental particulièrement large, a permis le développement local répété de roches mères, au sein du plateau, dans de vastes bassins bénéficiant souvent d'une juxtaposition optimale avec les roches réservoir et roche-couvertures. L'article étudie ces évènements. Si les réserves actuellement prises en compte sont essentiellement d'origine mésozoïque et tertiaire, l'auteur conclut que de nombreuses sources régionales pré-mésozoïques ont généré d'énormes volumes d'hydrocarbures, dont la majeur partie reste à découvrir dans des réservoirs pal

  17. Données nouvelles sur les marges du Bassin Ionien profond (Méditerranée Orientale. Résultats des campagnes Escarmed New Data on the Margins of the Deep Lonian Basin (Western Mediterranean. Results of the Escarmed Campaigns

    Directory of Open Access Journals (Sweden)

    Biju-Duval B.

    2006-11-01

    Full Text Available Etudes bathymétriques précises par le sondeur multifaisceaux Seabeam, prélèvements de roches et de sédiments par dragages, plongées avec le submersible Cyana 3000, ont permis d'apporter des données nouvelles sur l'évolution mésozoïque et cénozoïque des marges du bassin Ionien profond. II s'agit toujours d'escarpements à pentes très raides où affleurent des séries sédimentaires anciennes. Les sédiments récents y sont très réduits et illustrent bien un modèle de sédimentation condensée. La tectonique et l'érosion récente sont évidents mais le façonnement des escarpements est antérieur au Miocène et peut varier d'une zone à l'autre. Le changement fondamental de sédimentation qui intervient entre le Lias inférieur et le Jurassique moyen le long de la falaise de Malte n'est pas prouvé ailleurs ; aux faciès pélagiques du Jurassique-Crétacé observés sur la bordure sud du bassin Ionien s'opposent les séries carbonatées de plate-forme fortement subsidente du Crétacé supérieur observées au Nord (Apulie. Detailed multibeam bathymetric surveys, dredging and diving with the Cyana 3000 submersible have provided new data on the Mesozoic and Cenozoic evolution of the margins of the deep lonian Basin. Old sedimentary series outcrop along very steep slopes, and recent sediments are very thin. Such scarps are thus a good model of starved margins where condensed sedimentation has occurred. Despite recent tectonic and erosional processes, the genesis of these scarps is at least pre-Miocene and varies from place to place. Drastic changes in sedimentation between the early Lias and the middle Jurassic are observed along the Malta escarpment. Pelagic facies, slopes and deep environments characterize the Jurassic and Cretaceous deposits, while highly subsiding platform carbonate deposition is still observed in the north (Apulia.

  18. Géochimie organique du bassin de Paris Organic Geochemistry of the Paris Basin

    Directory of Open Access Journals (Sweden)

    Espitalie J.

    2006-11-01

    Full Text Available On présente ici les principaux résultats de l'étude géochimique réalisée, dans le bassin de Paris, à partir des déblais et des carottes provenant de 100 sondages pétroliers ou miniers, et des huiles prélevées dans les réservoirs du Mésozoïque (Trias, Bathonien supérieur, Néocomien. Les différentes méthodes géochimiques utilisées sont la pyrolyse, particulièrement bien adaptée à l'étude des nombreux échantillons de déblais recueillis, la chromatographie en phase gazeuse pour l'analyse détaillée des huiles et des extraits de roche, la spectrométrie de masse pour l'étude des biomarqueurs. Les époques principales de formation de l'huile et du gaz ont été déterminées par simulation sur ordinateur d'un modèle mathématique de genèse des hydrocarbures. Les méthodes de pyrolyse ont permis de dresser des logs géochimiques des forages étudiés et de déterminer, par le calcul, les paramètres de pyrolyse initiaux des roches-mères, avant leur enfouissement. On a pu ainsi établir, dans le périmètre étudié, des cartes de carbone organique initial, de potentiels pétroliers totaux et de quantités d'HC migrés. L'ensemble de ces résultats montre que les roches-mères de la grande majorité des huiles du Mésozoïque sont situées dans le Lias, s'échelonnant depuis le Toarcien jusqu'à l'Hettangien et que les meilleures zones de potentiel pétrolier du Bassin sont localisées à l'emplacement des régions de forte subsidence à l'époque du Lias. L'étude détaillée des hydrocarbures et celle des biomarqueurs ne permettent pas de distinguer les différentes huiles entre elles, quelle que soit leur profondeur, ni de leur attribuer une origine précise à partir des différents niveaux du Lias. Les cartes de migration mettent en évidence des déplacements latéraux des hydrocarbures dans certaines roches-mères (cas du Toarcien inférieur. Elles montrent aussi un déficit important en hydrocarbures à la base du

  19. Unconventional Gas Resources in the Paleozoic of Central Europe Ressources de gaz non conventionnels dans le Paléozoïque de l’Europe Centrale

    Directory of Open Access Journals (Sweden)

    Littke R.

    2011-05-01

    shales et du gaz de houille (coalbed methane, CBM. Les grès de faible perméabilité se trouvent surtout parmi les couches permiennes (Rotliegend aux Pays-Bas et dans le nord de l’Allemagne, mais aussi dans les couches du Carbonifère supérieur. La production est déjà active dans quelques-uns de ces réservoirs. Pour l’avenir, le développement dépendra principalement de l’amélioration de la compréhension du gaz en place et de la distribution régionale de la porosité et la perméabilité qui, d’ailleurs, dépendent du faciès lithologique et la diagénèse. La recherche de gaz dans les roches argileuses, par contre, vient juste de commencer. Les roches argileuses mésozoïques dans le sud du bassin de Basse-Saxe (Lower Saxony Basin sont des objets d’exploration prioritaire à cause de leur épaisseur, de leur maturité et de leur teneur en matière organique. Mais il existe d’autres séries intéressantes dans le carbonifère inférieur et des couches plus anciennes. Actuellement, un projet de recherche international vise à acquérir des données géologiques sur ces systèmes. La recherche du gaz de houille (CBM a commencé dans la bassin de la Ruhr il y a une vingtaine d’années, mais avec un succès très limité à cause de faibles débits de gaz. En revanche, le captage de grisou des mines de charbon abandonnées a fourni de considérables quantités de gaz. De par la multitude des filons houillers et des conditions de maturité et de teneurs en gaz favorables, il existe dans cette région un potentiel considérable de gaz de houille.

  20. L'Escarpement de Malte, le mont Alfeo et les monts de Médine: marges anciennes du bassin Ionien (synthèse des données des campagnes a la mer Escarmed Malta Escarpment, Alfeo and Medina Seamounts: Former Margins of the Ionian Basin

    Directory of Open Access Journals (Sweden)

    Groupe Escarmed

    2006-11-01

    caractéristiques, une forte déclivité et une couverture sédimentaire peu épaisse à une morphogénèse complexe car polyphasée. En effet, en plus du facteur lithologique (parois calcaires imposantes, il y a un facteur tectonique essentiel : l'évolution d'une marge continentale mésozoïque réactivée par des phases tectoniques plus récentes, essentiellement Miocène et Plio-Quaternaire. C'est cette originalité qui distingue l'escarpement de Malte et les monts de Médine des autres marges méditerranéennes occidentales et qui permet leur comparaison avec d'autres marges continentales, atlantiques par exemple. The Comité d'Etudes Pétrolières Marines (CEPM and the Centre National pour I'Exploitation des Océans (CNEXO have carried out a series of subsea surveys of Ionian escarpments to define their origin, age and evolution. The results given here concern the Malta escarpment, the Alfeo and Medina seamounts west and southwest of the deep Ionian basin. They include bathymetric data in the form of a 1:100,000th map accompanying the text, a morphological analysis of reliefs, stratigraphic determinations performed on samples gathered by dredging, coring or diving, a structural analysis from seismic-reflection profiles and dives, and a study of subsidence since the Upper Triassic from actual boreholes drilled in the Maltese shelf and fictitious boreholes on the edge of the Malta escarpment. The conclusions bring out:(a the existence of calcareous platform series of early Jurassic age for the Malta escarpment and the Alfeo seamount and of early Cretaceous age for the Medina seamounts;(b a major paleogeographic change starting in the late Jurassic for the Malta escarpment and in the Albian for the Medina seamounts;(c the development of condensed series dating from this paleogeographic change and the presence of constant erosion until the Present, an erosion in which the various processes have numerous consequences on the sedimentation of such reliefs;(d four main

  1. Sédimentation et tectonique dans le bassin marin Eocène supérieur-Oligocène des Alpes du Sud Sedimentation and Tectonics in the Upper Eocene-Oligocene Marine Basin in the Southern Alps

    Directory of Open Access Journals (Sweden)

    Riche P.

    2006-11-01

    Full Text Available Des études de terrain détaillées ont été reprises récemment par l'Institut Français du Pétrole (IFP et l'Ecole Nationale Supérieure du Pétrole et des Moteurs (ENSPM dans la partie occidentale du bassin nummulitique des Alpes du Sud afin d'aider les interprétations de données sismiques. Ces études soulignent l'importance de la tectonique en distension qui a affecté le bassin durant la sédimentation; elles remettent en question l'interprétation géodynamique de ce bassin considéré classiquement comme une avant-fosse de la chaîne alpine en cours de formation. Sur un substratum mésozoïque structuré par la phase pyrénéo-provençale, la transgression nummulitique envahit dès le Lutétien les parties les plus basses du bassin situé à l'Est dans une zone qui sera oblitérée au Mio-Pliocène par l'accident pennique. Elle s'étend progressivement vers l'Ouest durant l'Eocène supérieur. Dans le même temps une phase de distension E-O bien visible le long des failles du Var et en bordure du Pelvoux se traduit par le compartimentage des bordures du bassin et par des jeux en blocs basculés durant la sédimentation. Dans les calcaires qui débutent la série marine, ces jeux sont responsables du passage rapide de faciès de plate-forme à des faciès resédimentés sur les pentes, puis à une sédimentation gravitaire de plus en plus réduite en s'éloignant des bordures. Les marnes sus-jacentes correspondent à des dépôts de talus qui soulignent la topographie héritée. Le passage à la sédimentation turbiditique des grès d'Annot s. l. , est corrélé avec le début d'une activité de rift sur le bloc corso-sarde et le changement climatique qui intervient à cette époque. Le dépôt de ces grès dont l'épaisseur maximale observée est de 1 200 m correspond à une phase de remplissage, avec des onlaps bien marqués soulignant les paléopentes. La distension E-O se poursuit durant la sédimentation des grès mais elle s

  2. Sedimentary Basins of the Republic of Yemen : Their Structural Evolution and Geological Characteristics Evolution structurelle et caractéristiques géologiques des bassins sédimentaires de la république du Yemen

    Directory of Open Access Journals (Sweden)

    Beydoun Z. R.

    2006-11-01

    'unification des deux ex-Yemen, a incité de nombreuses compagnies pétrolières à se lancer dans la course à l'exploration, à exécuter des études sismiques approfondies et à entreprendre des campagnes de forage intensives en de nombreux points du pays. Il en a résulté un accroissement rapide du nombre des nouvelles données géologiques concernant le sous-sol et une perception de plus en plus claire de la distribution, de l'orientation et du moment de formation des principaux bassins. Il convient de noter, toutefois, qu'aucune synthèse de l'ensemble des résultats n'a encore été entreprise, chaque compagnie ne s'intéressant qu'à sa concession et aux zones avoisinantes. Des études récentes portant sur l'analyse, la comparaison et la synthèse de la masse des nouvelles données stratigraphiques disponibles, dans le cadre de la standardisation de la nomenclature lithostratigraphique utilisée au Yemen et de sa mise en conformité avec les normes et règles internationales ont demandé obligatoirement la mise en place d'un cadre structurel général permettant une corrélation stratigraphique entre les bassins et à l'intérieur de ces derniers. L'objet du présent article est donc de présenter la nouvelle carte des bassins sédimentaires et des redressements qui les séparent. La formation des principaux bassins mésozoïques résulte de l'extension et de l'effondrement du système jurassique récent qui ont entraîné, essentiellement, la réjuvénation de l'ancienne faille de Najd orientée nord-ouest/sud-est suivie de l'apparition d'un rejet horizontal. Les bassins du Tertiaire sont nés de la séparation de l'Arabie et de l'Afrique au Néogène le long des axes du golfe d'Aden et de la mer Rouge. Les principaux redressements remontent à la même époque, le plus ancien et le plus persistant étant la chaîne de l'Hadhramaout. Toute l'activité tectonique est liée à la fragmentation et à l'éclatement du Gondwanan, depuis la fermeture initiale du pal