Layer | Fill | Outline |
---|
Map layers
Theme | Visible | Selectable | Appearance | Zoom Range (now: 0) |
---|
Fill | Stroke |
---|---|
Collaborating Authors
Search depression: Search
...Search for Graves E/G 3.5 Bruce W! Bevan, Geosight SUMMARY is dug to a depth of 1 - 2 m, the soil may ... topsoil can be been found to be most suitable for this higher in magnetic susceptibility than the search are ground-penetrating radar and subsoil. The electrical conductivity of the electromagnetic induc...
...2 Search for graves INSTRUMENTS FOR THE ...SEARCH clutter at many cemetery sites for magnetic surveys to be of little value. Ground-penetrating rada... variety of other technisues have all Imai, 1987) can provide annroximate soil been employed in the search for -graves or profiles, with echoes caused by contrasts tombs: seismic (Lineham, 19561. SP (Wvnn ...
...Search for graves 3 magnetic survey could not reliably locate and possibly metal frames. the iron of ...
When Over the decades, grave markers in old this earth is replaced, some topsoil may cemeteries have been lost.
...Application of new techniques to gravity survey in search of buried hills Xu Xiaofang * , Zhang Sheng, Yang Zhanjun and Suo Xiaodong, BGP, CNPC Summary...y and Figure 1 shows clearly that a certain density difference horizontally, providing evidences in search of buried hills. appears across each interface, of which the interface between The application of t...
... formed and developed before the Tertiary All the density variations, providing an evidence for the search of above anomalies show the features roughly similar to 10km buried hills. The second-vertical deri...
Summary In this paper we take a particular depression in Bohai bay basin as an example to introduce how we searched for the small-scale, low-relief, and deep-seated buried hills by the use of new techniques, such as the second–vertical derivative after downward continuation to a given depth, 3D apparent density inversion, joint inversion with gravity, magnetic and seismic data on the LCT platform. The anomaly of the second-vertical derivative after downward continuation to a certain depth reflects a small-scale, low-amplitude, and deep-seated buried hill more effectively and intuitively compared with the conventional second-vertical derivative anomaly. The 3D apparent density inversion section can reflect geological bodies’ density variations both vertically and horizontally, providing evidences in search of buried hills. The application of the LCT joint inversion with gravity, magnetic, and seismic data can quantitatively determine the depth and amplitude of buried hills. Introduction The reservoir developed in a buried hill makes up a crucial formation in the Bohai bay area. Buried hill reservoirs of the middle- and upper Proterozoic carbonate and the lower Paleozoic carbonate are extensively developed in the terrestrial rift basin of the Mesozoic and Cenozoic in eastern China, where they constitute one type of crucial highproduction reservoirs among them. Bohai bay basin is its representative. Mesozoic and Cenozoic sediments have been deposited at great depth in the study area, reaching 7000m. 3D seismic exploration has been carried out and local structures developed in shallow layers have been generally clarified, but deep horizons appear unclear and some buried hills are hard to identify and interpret, hindering development of buried-mound reservoirs. Meanwhile, this kind of special geological body is remarkably different from its overlying formation in density, providing prerequisite for gravity surveys to solve this kind of problem. Density features of the work area The formation density is an important parameter for gravity data interpretation. Here we have collected 7 density well-logs or derived well-log data converted from sonic logs in this area as well as density data in its surrounding areas concluded previously. New techniques and their application 1. Downward continuation technique Downward continuation is to convert the gravity anomaly from the observation plane to a certain depth beneath the observation plane, but above the anomaly source [1], equivalent to the observation plane closer to the anomaly source, so it reflects the target more obviously. The layer density of the Tertiary presents a small variation in the lateral direction, and the depth to the bottom of the Tertiary is more than 1km, so it complies with the potential field theory to extract and strengthen weak anomaly information of a relatively small geological body with 1km downward continuation gravity anomaly. After comparison we can conclude that the latter presents obvious zonation and row in the center-to-north part and SW part (corresponding to two depressions of regional structures), while the former is worse in this regard. Moreover, the latter presents three rows of NE-oriented local anomalies in NE part of the work area, which gradually lessens in amplitude and scale
- Phanerozoic > Mesozoic (0.46)
- Phanerozoic > Cenozoic (0.45)
- Phanerozoic > Paleozoic (0.35)
- Geophysics > Seismic Surveying (1.00)
- Geophysics > Gravity Surveying (1.00)
...ral theme, yet it is implicit groups. On the other hand, English speakerscould adopt that it is the search for these elusive reservoirs that is of with profit the Russian category of "lithologic traps". par...e of any direct oil-pool detecting Geologists in April of this year, Gordon Rittenhouse device, the search for stratigraphic traps must be based proposed a modification of Levorsen's classification of possi... can be of great help, Russian one at the highest level, i.e. the division of and any comprehensive search makes full use of them. traps into those adjacent to, or not adjacent to, The paper by our Russian ...
...des the basic faults. It is a good example of the role of geology in tool with which geologists can search for stratigraphic modern exploration and exploitation, presenting accumulations. That is the positi...ct deserves detailed a picture as possible of subsurface geology in note. In the past 15 years this search for stratigraphic the hope of revealing a lead to a potential trap that and stratigraphic-structura... involved, hope that the preparation and presentation of this and there are also many cases where a search based Panel Discussion has and will contribute towards the on structure finds a reservoir trapped s...
Dr MEHMET AKKUS (Turkey) read a summarised version of a paper by himself and co-author Dr FIKRET KURTMAN (Turkey) entitled "Inter-Mountain Basins in the Eastern Anatolia (Turkey) and their Oil Possibilities". He pointed out that there were four large, deep, tertiary filled intermontane basins in the Anatolia-Taurid belt of Eastern Anatolia, which, because of marked facies changes in their Sediments, should contain stratigraphic traps. The presence of oil seeps encouraged him to think that these might be prospective. Dr N. A. EREMENKO (U.S.S.R.) and Dr I. M. MICHAILOV (U.S.S.R.) presented a comment entitled "Pools caused by Tectonic Sealing of the Reservoir". There was no provision made in the programme for the discussion of other types of trap than stratigraphic. But the problems associated with tectonically sealed pools are still inadequately investigated although such pools are widespread in nature. Pools sealed up dip by impermeable material in a bounding fault zone are well known. Other cases, in which the trap is due to a capillary pressure difference across a permeable fault zone, have been described by D. A. Smith (Bull AAPG, v. 50, No. 2, 1966). But there are still other phenomena, connected with the rheological properties of the fluids, which also cause trapping against a permeable fault surface under suitable conditions. The initial pressure gradient is the limit below which the flow of oil or gas through a porous medium will not start. This operates for both Newtonian and non-Newtonian fluids; it is clearly demonstrated mainly in reservoirs with some argillaceous admixture. The theory of this gradient is fully discussed in Special Paper No. 9 [Volume 4 of Proceedings] presented to this Congress by A. KH. MIRZADJAN- ZADE et al. Hydrocarbon entrapment due to the initial pressure gradient effect is dependent on fluid and reservoir properties, In nature, capillary pressure and initial pressure gradient act together and simultaneously. Pools associated with both capillary pressure and initial pressure gradient are called "pools of initial pressure gradient" for short. There are also special types of hydrodynamic traps against fault zones with good permeability. In such traps the pressure at the apex of the oil accumulation is balanced by the pressure of the water in the fault zone. It follows that the bottom waters of the pool must be underpressured, as the oil column, with its lighter density, would normally give rise to an excess pressure. Such is indeed found to be the case. It is further observed that such underpressured reservoirs are in rocks of reduced permeability while the more permeable beds abutting the fault zone are in pressure equilibrium with the fault zone waters. Pools of this sort are widespread in the Dniepetrovsk-Donetsk depr
- North America > United States (0.95)
- Asia > Middle East > Turkey (0.65)
- Europe > Ukraine > Donetsk Oblast > Donetsk (0.24)
- Geology > Structural Geology > Fault (1.00)
- Geology > Petroleum Play Type > Conventional Play > Stratigraphic Play (0.75)
- Geology > Geological Subdiscipline > Economic Geology > Petroleum Geology (0.49)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock (0.35)
- South America > Venezuela > Caribbean Sea > Venezuela Basin (0.99)
- South America > Venezuela > Anzoátegui > Eastern Venezuela Basin > Oficina Formation (0.99)
- South America > Venezuela > Anzoátegui > Eastern Venezuela Basin > Maturin Basin > Oficina Field (0.99)
- (4 more...)
...f the U.S.S.R.'s territory is prospective Environ la moitié du territoire de l'U.R.S.S. est for the search for oil and gas. Occurrences are discovered perspective pour les recherches du pétrole et du gaz. w...
...of the the terrigenous reservoirs of the Cretaceous, occurring Carboniferous Sediments, and also by search for new at different depths (from 600 to 400 m) depending on pools in the Devonian. The Vuktilian f...
...ict a very province. large Orenburgian gas field confined to the big In the northern part intensive search for oil and gas tectonic rampart was discovered recently in Permian pools, connected with the zones... of regional pinching deposits. Search for new pools in the Lower Paleozoic out of Jurassic and Cretaceous reservoirs, is going on. within...
Abstract About half of the U.S.S.R.'s territory is prospective for the search for oil and gas. Occurrences are discovered within the whole sedimentary sequence-from the Lower Paleozoic up to the Tertiary. Over the last 10 years explored reserves have increased by 1.7 times and gas reserves by more than 5 times. Hundreds of new oil and gas fields were discovered in regions with highly developed extractive industries; new, rich, oil and gas-bearing provinces have been revealed. A large portion of the discoveries are connected with the complex of Mesozoic Sediments to which about one-third explored reserves of oil and two-thirds reserves of gas are confined at the present time. There was discovered a new oil and gas-bearing province in the West-Siberian depression, where in 1970 over 31 million tons of oil were produced; in 1975 there will be produced 120 million tons and in 1980, 230-260 million tons. This discovery is a remarkable result of exploration work for the last ten years. A great gas reserve area has been explored in Central Asia. The discovery of new large deposits in old regions (Volga-Ural province, Timano-Pechora oil and gasbearing province etc.) evidences the possibility of the continuation of searches, particularly in new stratigraphic. complexes and in relatively poor studied areas. The main trends for further exploration work for oil and gas are as follows: Résumé Environ la moitié du territoire de l'U.R.S.S. est perspective pour les recherches du pétrole et du gaz. Les champs pétroliers sont découverts dans toute la série sédimentaire, à partir du Paléozoïque inférieur jusqu'au Tertiaire. Durant les dix années dernières les ressources de pétrole déjà prospectés ont augmenté de 1,7 fois et ceux de gaz plus de 5 fois. Des centaines de nouveaux gisements ont été découverts dans les régions à l'industrie pétrolière très développée; sont mises en evidence de richissimes nouvelles provinces pétrolifères et gazifères. Une importante partie de découvertes est liée à l'ensemble des formations mésozoïques auxquelles sont actuellement attribués près de 1/3 des ressources prospectés de pétrole et près de 2/3 des ressources de gaz. Un des résultats remarquables des études géologiques réalisées durant les dix années dernières est la découverte d'une province pétrolifère et gazifère dans la Plaine de Sibérie Ouest ou en 1970 il est extrait plus de 31 millions de tonnes du pétrole; en 1975 il y serait extrait plus de 120 millions de tonnes et en 1980 de 230 à 260 millions de tonnes. D'important sressources du gaz sont prospectés en Asie Centrale. La découverte de grands gisements nouveaux dans des anciennes régions (province de Volga et d'Oural; région pétrolifère et gazifère de Timan et Petchora, et autres) prouve la nécessité d'y continnuer la prospection, surtout dans de nouveaux ensembles stratigraphiques
- North America > United States (1.00)
- Asia > Russia (0.95)
- Phanerozoic > Paleozoic > Permian (1.00)
- Phanerozoic > Mesozoic > Cretaceous (0.70)
- Phanerozoic > Paleozoic > Devonian > Upper Devonian (0.48)
- Phanerozoic > Paleozoic > Carboniferous > Mississippian (0.48)
- Geology > Geological Subdiscipline > Stratigraphy (0.49)
- Geology > Structural Geology > Tectonics (0.47)
- Geology > Rock Type > Sedimentary Rock (0.47)
- Asia > Russia > Ural Federal District > Khanty-Mansi Autonomous Okrug > West Siberian Basin > Central Basin > Megionskoye Field (0.99)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.98)
- North America > United States > Texas > Permian Basin > Yates Formation (0.98)
- (24 more...)
...e U.S.S.R. (1955-1957). Electric prospecting and gravity survey are also used to some extent in the search for and in detailed studies tiLOGKAPHICAL DISTRIBUTION OF GEOPHYSICAL PARTIES IN PRINCIPAL PETROLI...ploration i s to ñnd favourable areal work and to highly detailed exploratory work. regions for the search for local oil and gas-bearing Good results have been obtained in the study of telluric structures. ...The need for a development in - the Caspian, Azov, Okhotsk, etc. [34]. A relatively rect methods of search for oil and gas deposits is small amount of areal geophysical exploration am utely feit. This has s...
... geophysical exploration as well as in peculiar longitudinal floats. The shot holes are drilled the search for local structures in certain areas. Experiments in the river hydraulically; that is, the rod is ...
...PROGRESS IN GEOPHYSICAL METHODS FOR PROSPECTING FOR OIL AND GAS IN THE V.S.S.R. 619 the search for local structures in sedimentary strata Seismic prospecting usually makes it possible to identif...cts of the west Siberian lowland. other areas. An example of the results of the seismic The seismic search for structures in platform areas prospecting in the Northern Caucasur j is given in encounters ...
iropean part of the U.S.S.R., Sibe Among the new geophysical ins sonance magnetometer, the gravii seismic prospecting, instrnments for controllc At the present time, regional geophysii studies, are conducted with a combination soundings of the hasic layers of the earth's cri were conducted in Central Asia, the Ukraii Ocean, and in other regions, and in each c, been established ihat the petroleum deposita the crystalline basement and their steep slopi Reflection seismic prospecting remaini structures and has resulted in the discovery difficult to apply the seismic method in deta Platform region. Radiometric and other geol ABSTRACT. -2loring for oil in the U.S.S.R. increased 1.8 fold. This includes a 1.9 fold increase in the number of seismic crews. Most of the geophysical. work was conducted in the Caucasus, the Ukraine, in the eastern regions of the Ei tria, and Central Asia. rtruments produced an :]earre ty gradiometer, the da 3 forth, -tuuJ Lv.mun.b L.Uiiuiiru, ..able 24-channel seisvi- atatrnnr. annaratils tnr river ana marine ed direction cal investig of gravit] ust, including le, the Russi ase they yielc i of the Rusi es. ed the principal mernvu vi setircii iur pcuuiiiciuua of important oil and gas fields. However, it is still very iled exploration of very gently dipping structures in the physical methods h d for the direct detection..a definite results w although there are some During the years 1955-1958, ihe number ox s~v, xn, uxcu~u1 u11 iIIIu Bd3 ur;k, vul, u IIVI.L &..., grounds for continuing such experiments. RESUME. De 1955 à 1951 en URSS a &té niultiplié pi Parmi les nouveaux appareils géophysiqu doit mentionner: le magnétomètre à gravité, d'étude des courants telluriques, les stations si! de prospection sismique marine et fluviale, lez sismiques. Actuellemeni, les recherches géophysiquc postérieures plus détaillées, sont conduites e d used during recent years are: the nuc imped marine gravity meter, apparatui I. tal reception of seismic waves. ations, used as a guide for further detailed Y and magnetic mapping and deep seismic ian Platform, the Caspian Sea, the Pacific ded important results. For one thing it has Sian Platform are associated with uplifts in ave been trie ere obtained, tométrique, en tenant compte de profonds son(y compris la surface Mokhorovitchich. On a
- North America > United States (1.00)
- Europe (1.00)
- Asia (1.00)
- North America > Canada > Alberta > Woodlands County (0.25)
- Geology > Rock Type (1.00)
- Geology > Structural Geology > Tectonics > Plate Tectonics (0.67)
- Geophysics > Seismic Surveying (1.00)
- Geophysics > Gravity Surveying > Gravity Acquisition (1.00)
- North America > United States (0.89)
- Europe (0.89)
...ocks from the side of the margins is proposed. This approach will allow more productive work on the search for structures of the Karachaganak type. Introduction. Crisis exploration in Western and Northern ...ues and technologies developed at the unique fields of the Precaspian Basin are widely used for the search of" Karachaganak-type " objects, but for 30 years Karachaganak-2 has not been found. In the Saratov... of various petroleum service companies and industry institutions in the preparation of objects for search or parametric drilling are established. The main cause of errors - the human factor, the mutual lac...
...slide. It is assumed that taking into account these criteria will allow more purposeful work on the search for structures of the Karachaganak type. References (in Russian) 1. Anisimov L. A., Delia S. V., ...
Abstract The nature of the margins of the Precaspian Basin remains one of the most controversial issues, which at the same time, is crucial for determining the prospects of oil and gas potential. The success of the Karachaganak field discovery in 1979 is still not repeated, which is due to the suboptimal modeling of objects of this kind. A new approach to understanding the conditions of formation of carbonate massifs in the inner part of the depression as a consequence of the gravitational sliding of rocks from the side of the margins is proposed. This approach will allow more productive work on the search for structures of the Karachaganak type.
- Europe > Russia (0.95)
- Asia > Kazakhstan > West Kazakhstan Region (0.56)
- Phanerozoic > Paleozoic > Permian (1.00)
- Phanerozoic > Paleozoic > Devonian (1.00)
- Phanerozoic > Paleozoic > Carboniferous (0.68)
- Geology > Geological Subdiscipline (0.68)
- Geology > Structural Geology > Tectonics > Plate Tectonics (0.46)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock (0.30)
- Asia > Kazakhstan > West Kazakhstan > Uralsk Region > Precaspian Basin > Karachaganak Field (0.99)
- Asia > Kazakhstan > West Kazakhstan > Precaspian Basin (0.99)
- Asia > Kazakhstan > Mangystau Oblast > Precaspian Basin (0.99)
- (30 more...)
Portable Automated Plate Straightener
Turner, Garth E. (Northrop Grumman Ship Systems) | Jones, Jerry E. (tN.A. Tech) | Rhoades, Valerie L. (tN.A. Tech) | Clem, Timothy E. (tN.A. Tech) | Sarnow, Pierre L. (tN.A. Tech) | Madden, Stephen K. (tN.A. Tech) | Cuneo, Adam (tN.A. Tech) | McMahon, J. (Bollinger Shipyards, Inc.)
...¢a,,elScee4 eesi m Vs e 27 - Spot spacing (between spots) x,' : 38o, ],a ei& e 15 deg @eg CuwterkSearchTalget: t '4 F, il t.Ot mw - Line spacing (between rows of spots) frm - Deckplate thickness (f...
Welding thin plates and fitting together ship modules, using heavy weights and hoists, causes distortion of the decks. This distortion drives decks out of compliance with specifications for fairness. The Portable Automated Plate Straightener (N.A. Tech, Golden, CO) is an application of flexible automation. It is able to straighten the deckplates without operator intervention.
- Transportation > Marine (0.70)
- Shipbuilding (0.68)
- Government > Regional Government > North America Government > United States Government (0.68)
- (2 more...)
4. Reflection-Seismic Exploration of Schleswig-Holstein, Germany, and its Geological Interpretation by Well Data (Germany)
Hecht, F. (DEA, Deutsche Erdöl-Aktiengesellschaft, Hamburg) | Helms, H. V. (PRAKLA, Gesellschaft für praktische Lagerstättenforschung, Hannover) | Kehrer, W. (WIAG, Wintershall-Aktiengesellschaft, Celle)
...us, the geophysical problems changed from those associated with salt-domes to those arising in the search for structural and stratigraphical traps within the Dogger (Chapter P. The geophysical results, com...
...ger strata in the flanks Furthermore, the greater penetration revealed of salt plugs as well as the search for stratigraphical the tectonics of deep-seated structures. traps in the Dogger then became of par...
...e Maps depth determinations. It was necessary, here have been reduced to I: 400,000). therefore, to search for velocities applicable to Map No. 1 is a seismic contour-map of larger areas. The first attempt ...
SY~Ol'SlS. Detailed reflection-seismic surveys have been carried out all over Schleswig-Holstein. They have resulted in an accurate delaneation of geological structures, because the exact stratigraphical position of typacal seismic horizons was obtained from well data, and becausp on a regional scale, certain horizons could be traced by means of uniform velocity-parameters. The geophysical investigation was considerably intensified when exploration wells found excellent oil reservoirs in the Wealden and Dogger. Thus, the geophysical problems changed from those associated with salt-domes to those arising in the search for structural and stratigraphical traps within the Dogger (Chapter P. The geophysical results, combined with those of more than 40 deep wells, have furnished detazled stratigraphical, lithological and structural data on the most dominant structures, the flanks of salt domes and sedimentary basins. As a result, the main structural units of Schleswig-Holstein have been disclosed as:the West-Schleswzq block, the East-Holstein block both being smooth uplifts with structurally high-lying Trias, and the Middle-Holstein block, which is divided into the two deep-rooted Jurassic troughs of Heide and Bramstedt-Kiel with marked subsidence and sedimentation during the Jurassic, and the Rendsburg uplift which lies between them and is characterized by high-lying Trias and by shallow depressions between salt-diapirs which have a Rhenish trend (Chapter II). The paleogeographical and structural genesis of these Jurassic troughs is discussed in detail (Chapter III). Typical Saxonian tension tectonics are confined to the Middle-Holstein block, the western and eastern boundaries being characterized by strong fault zones. A distinctive swing from S-N to SE-NW in the northeastern part of the Middle-Holstein block probably indicates a break in Stille's U Mittelmeer-Mjosen-Zone », caused by proximity to the (1 Tempelburger Achse ». The Rhenish zone reappears again farther north in the Zechstein sali dome basin of Northwest Jutland (Chapter IV). The newly discovered oil fields of Schleswig-Holstein produce exclusively from the "Wealden" (Hohenworden) and the Dogger (Hohenworden, Plon, Boostedt, Bramstedt). They are confined, together with the long known deposits on the Heide salt-diapir, to the Jurassic troughs and the Tertiary depression zones. The conclusion is justified, that the development of the oil deposits depends on the structural configuration of the area. The Lias with its sapropelific Sediments is believed to be the source rock, from which the oil was moved as a result of the enormous subsidence in the Tertiary depressions (Chapter V). Rl%WMIk Dans le passé, tout le Schleswi
- Phanerozoic > Mesozoic > Cretaceous > Upper Cretaceous (0.94)
- Phanerozoic > Cenozoic > Tertiary (0.88)
- Phanerozoic > Mesozoic > Jurassic > Middle Jurassic > Bathonian (0.46)
- Geology > Structural Geology > Tectonics > Salt Tectonics (1.00)
- Geology > Geological Subdiscipline > Stratigraphy (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock (0.31)
- North America > United States > Gulf of Mexico > Central GOM > East Gulf Coast Tertiary Basin > Green Canyon > Block 644 > Holstein Field (0.97)
- Europe > United Kingdom > North Sea (0.89)
- Europe > Poland > Baltic Basin (0.89)
- (3 more...)
...ry pools, thus forming a directed to the following objectives: composite superimposed trap. 1. The search for subtle stratigraphic traps. From (8) Anticlines created by draping There are traps our experien...
...lt displacement as oil-field extensions. depressions alternating with high buried hills; the 2. The search for oil bearing strata*in the lower Yellow River estuary is the extension of Jiyang part of the Ter...able sites for detailed exploration. of the basin seaward, with the result that the offshore 3. The search for additional depressions in underexplored Bozhong depression was the centre of subsidence in area...
Abstract. The North China basin covers approximately 200 O00 km2, it forms part of the North China plate. A tensional tectonic setting during Cenozoic time caused the formation of more than 60 asymmetrical or symmetrical graben syFtems, each covering an area from several hundred to thousands of square kilometres. The depressions are filled by Sediments of Tertiary age. The fault movements are frequently syndepositional and affect reservoir distribution. The source areas for the clastic deposits are graben margins and intra-graben highs. The bulk of the Sediments were layed down predominantly under fresh water conditions. The main reservoirs are siliciclastics; locally carbonate reservoirs occur. Deep lacustrine Sediments rich in organic material are the hydrocarbon source. The organic matter reached thermal maturity mainly in the deepest parts of the graben systems. Hydrocarbon migration of short distance towards the peripheral areas has taken piace. Source bed controls the regional oil occurrences. A great variety of traps exist: structural traps are fault blocks, roll-over anticlines due to listric faults (Shengtu oil-field) and cresta1 grabens of anticlinal features in the centre of depressions (e.g. Dong-Xing oil-field). Stratigraphic traps originated through truncation and pinch-out of sands. Porosity-permeability traps occur in carbonates (Pingfangwang oil-field). Important traps are buried hills (e.g. Renqui oil-field) and the resultant draping features within the Tertiary cover (e.g. Gudao oil-field). Many depressions are in the initial stage of exploration. These areas and subtle traps in producing depressions are the future targets onshore. However, the main exploration efforts will be concentrated offshore. Several prospective graben systems have been identified in this region where some discoveries have already been made. Résumé. Le bassin de la Chine du Nord couvre environ 200 O00 km2 et forme une partie de la plaque de la Chine du Nord. Le cadre tectonique de tension pendant le Cénozoïque a été la cause de plus de 60 systèmes de fossés tectoniques asymétriques et symétriques, chacun couvrant une surface de plusieures centaines à plusieurs milliers de kilomètres carrés. Les dépressions sont remplies de sédiments d'âge tertiaire. Les jeux des failles sont souvent syndépositionnels et portent sur la répartition des réservoirs. Les zones contenant des dépôts clastiques sont des marges de fossés tectoniques et des élévations intra-grabens. La plupart des sédiments ont été déposés surtout dans un régime d'eaux douces. Les principaux réservoirs se trouvent dans des roches silico-clastiques, avec localement des réservoirs dans des roches carbonatées. La source des hydrocarbures e
- Asia > China > South China Sea (0.63)
- North America > United States > Texas (0.48)
- Phanerozoic > Cenozoic > Tertiary (1.00)
- Phanerozoic > Cenozoic > Paleogene (0.71)
- Geology > Structural Geology > Tectonics > Extensional Tectonics (1.00)
- Geology > Structural Geology > Fault > Dip-Slip Fault > Normal Fault (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (1.00)
- Asia > China > South China Sea > China Basin (0.99)
- Asia > China > Gaosheng Field (0.99)
- Asia > China > East China Sea > Bohai Basin > Jiyang Basin > Gudao Field > Guantao Formation (0.99)
- (3 more...)
New Major Oil- and Gas-Bearing Areas of Young Platform of The U.S.S.R. (Western Siberia. Mangyshlak, etc.)
Mirchink, M. F. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Krylov, N. A. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Letavin, A. I. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Ervie, Y. G. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Rovnin, L. I. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Tokarev, V. P. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.) | Feigin, M. V. (Institute of Geology acrd Exploitation of Fuel Minerals, U.S.S.R.)
...le is very low. Therefore, should be noted that the structural stages in various the success of the search for oil and gas pools in the parts of the young platform of the USSR differ in transitional complex...oung platform at present serve as the basis for these problems most difficult. In view of that, the search selecting rational methods of oil and gas prospecting for economic oil deposits in the transitional...
...zones regarded as oil and gas formation zones. revealed earlier were discovered in these areas. The search for oil and gas on the Epipaleozoic platform Thus, young platforms constitute peculiar structural b...
Abstract Principal general features of the structure of young platforms are considered and new oil- and gas-bearing areas of Western Siberia and the Mangyshlak peninsula are described. Young (Epipaleozoic) platforms had developed on the site of Paleozoic geosynclinal folded regions. They are characterized by a three-stage structure. The lower structural stage is composed of geosynclinal formations and constitutes the basement of the platform. The middle structural stage is a transitional complex composed of sedimentary and partly of effusive formations of intramontane troughs and fault-trough-type depressions formed after the folding. The platform mantle which usually begins with Jurassic strata constitutes the third structural stage of the young platform. All the known economic oil and gas accumulations and the main prospects for discovering new fields are associated with it. By now, more than 15 oil- and gas-bearing areas have been revealed within the West Siberian depression. The richest of these, with regard to oil and gas reserves, are confined to the platform's inner tectonic zone of subsidence. Zones of oil-gas accumulation are controlled by various positive structural features such as arch uplifts, ramparts, and zones of lithological pinching out of productive series. Producing horizons are confined to Jurassic, Lower Cretaceous beds, and, in the northern part of the depression, to Cenomanian strata. With regard to its potential oil and gas reserves, the West Siberian Epipaleozoic platform is the biggest oil- and gas-bearing province of the USSR. Within the Mangyshlak oil- and gas-bearing region there have been revealed oil and gas fields situated in the Zhetybai-Uzen structural terrace which complicates the northern side of the Southern Mangyshlak system of troughs. Economic oil and gas occurrences are associated mostly with Lower-Middle Jurassic terrigenous Sediments. Further prospects for new oil and gas Résumé Régions nouvelles pétrolifères-gazifères volumineuses des domaines platesformiens récents de i'URSS (La Sibérie occidentale, Manguichlak, etc.). Annotation du rapport. Les domaines pétrolifères-gazifères volumineux de la Sibérie occidentale, du Boukharokhiva, du Karakoume central, du Manguichlak, du Prikoume, du Stavropole central et du Jéisko-Bérézansk, régions pétrolifèresgazifères et gazifères, sont disposées dans la limite des plateformes récentes (épipaléosoïques), qui sont formées à la place des domaines paléosoïques géosynclinaux rustiques. On examine dans le rapport les particularités de la constitution des plateformes récentes, les types des zones d'accumulations du pétrole et du gaz et les gisements pétroleux-gazeux le rapport stratigraphique des horizons payants et leur caractéristique de chantier pétrolifère, certaines conformités de répartitions des accumulations du pétrole
- Europe (0.89)
- Asia > Russia > Ural Federal District (0.46)
- Asia > Kazakhstan > Mangystau Region > Mangyshlak Peninsula (0.24)
- Phanerozoic > Mesozoic > Jurassic (1.00)
- Phanerozoic > Mesozoic > Cretaceous > Lower Cretaceous (0.90)
- Geology > Rock Type (1.00)
- Geology > Geological Subdiscipline (0.90)
- Geology > Structural Geology > Tectonics > Compressional Tectonics > Fold and Thrust Belt (0.68)
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > West Siberian Basin > Central Basin > Zapolyarnoye Field (0.99)
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > Purovsky District > West Siberian Basin > Central Basin > Tazovskoye Field (0.99)
- Asia > Russia > Ural Federal District > Tyumen Oblast > West Siberian Basin > Balykskoye Field (0.99)
- (4 more...)
- Well Completion > Completion Installation and Operations (1.00)
- Reservoir Description and Dynamics > Reserves Evaluation (1.00)
- Management > Asset and Portfolio Management > Reserves replacement, booking and auditing (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.89)