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4th EAGE St.Petersburg International Conference and Exhibition on Geosciences - New Discoveries through Integration of Geosciences
- Conference date: 05 Apr 2010 - 08 Apr 2010
- Location: Saint Petersburg, Russia
- ISBN: 978-90-73781-79-5
- Published: 04 May 2010
1 - 20 of 210 results
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Experience of Regional Geological Modeling by the Example of Yamal–Kara Region
Authors Y.P. Ampilov, A.A. Akhapkin, Y.I. Stein, B.V. Monastirev and I.I. NesterovBy authors of this thesis were contemplated methodical and technological problems arising in the process of the analysis of the diverse geology-geophysical information which is used at construction of geological models of large regions, and possible ways of overcoming of these problems
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Assessment of Undiscovered Petroleum Resources of the Yenisey–katanga Basin
Authors T.R. Klett and J.K. PitmanThe petroleum resource assessment of the Yenisey-Khatanga Basin exemplifies the United States Geological Survey assessment process for basins in the Arctic. This assessment of crude oil, natural gas, and natural gas liquids (collectively referred to as petroleum) resources is one of several conducted by the U.S. Geological Survey Circum-Arctic Oil and Gas Resource Appraisal program. Using a geology-based methodology, the USGS estimates the mean undiscovered, conventional petroleum resources in the province to be approximately 24 billion barrels of oil equivalent of crude oil, natural gas, and natural gas liquids.
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Geology and Petroleum Potential of the Upper Proterozoic Basins of Northern Siberian Craton
Authors S.V. Frolov, K.A. Sitar, Y.I. Galushkin and G.G. AkhmanovIn spite of insufficient geological and geophysical knowledge of upper Proterozoic formations in the north of Siberian platform there were several large sedimentary paleobasins. Part of them (for example, Anabar-Kureika and Udza basins) were intracratonic, another part of basins (for example, Turukhansk) were formed on the ancient continental margin. The data analysis of seismic surveys allows to suppose that these basins were the part of similar basins of central platform areas. There are several Riphean source rocks at the different stratigraphic levels. Meanwhile the Lower-Middle source rocks have realized of their hydrocarbon potential in quite a number of cases at the end of Riphean. These hydrocarbon accumulations most probably were destroyed during Baikalian tectonic processes. Maximum of Upper Riphean source rocks hydrocarbon generation was in Palaeozoic. It is the rocks which contribute to formation of oil-and-gas accumulation well preserved up to the present moment. The most intensive Vendian sedimentation occurred in the central part of Kureika syneclise area. Discovery hydrocarbon potential first of all refers to sides of syneclise near the slopes of Anabar and Baikit anteclises. We assume that Lower Vendian deltaic and coastal marine sandy bodies are present within these areas
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Sequence Stratigraphy of the Lower Cretaceous Deposits of the Chekurovka Area (NE Siberia, Lena R.)–Preliminary Results
Authors V.B. Ershova, J.M. Holbrook, A.K. Khudoley and A.V. ProkopievThis study specifically targets on two sections of Lower Cretaceous rocks located on the Chekurovka Cape (key section) and Chucha Cape. We documented the fluvial section in terms of sequences, consisted of low-accommodation and high-accommodation system tracts, where low-accommodation system tract is characterized by amalgamated channel belts and high-accommodation system tract is characterized by channel belts dispersed within fine-grained floodplain deposits. We identified four sequences in the Chekurovka Cape the Lower Cretaceous deposits. Each of the four sequences identified within the Chekurovka section was also identified within the Chucha Cape section. Although thickness of the individual sequences varies, all sequences with high and lower accommodation systems tracts are recognized and correlated between the two sections. This implies that the four underlying sequence boundaries can be regionally correlated within this foreland basin and likely extend beyond the boundaries or our study area as well. Variability in the available fluvial accommodation space probably was connected with variation of basin’s subsidence rate.
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Lateral Structural Segmentation of the Uralian Foreland Thrust Belt
Authors K. Sobornov BV, N. Malyshev, N. Nikonov, V. Martirosyan and K. Alzhanov BVThe subsurface data from different parts of the foreland thrust belt reveal significant along-strike structural changes. The four principal structural segments of the Uralian thrust belt are, from north to south: the Novaya Zemlya, Pechora, Volga-Ural and Precaspian segments. They broadly correlate with the heterogeneous basement domains flanking the Uralian suture on the west and corresponding variations in stratigraphic composition of the foreland subbasins. Another important factor controlling the changes is the regional geodynamic setting, particularly the one taking place in the late Permian times during the main phase of the Uralian orogeny (Sobornov and Yakubchuk, 2006). The observed structural changes reflect geometries of collision boundaries and orientations of compressional and strike-slip movements.
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Unravelling Hydrocarbon Migration and Entrapment in the Western Siberia Basin using Advanced Petroleum System Modeling
Authors M. Saint-Germes, J. Laigle, I. Goncharov, N. Oblasov, V. Samoilenko and F. LorantThe problem of the maintenance of the production level, entailing the industrial development of new reservoir systems is vital in Western Siberia (Russia). Such targeted systems include the deep Neocomian deposits (Achimov Fm) and Late/Middle Jurassic reservoirs. Hydrocarbon fields occur in Neocomian sandstone lenses, disseminated within silt and marine shale deposits. These reservoirs, stratigraphically associated to a large and complex system of clinoforms, correspond to both deep-water sand facies of the Achimov Fm at the base of the slope, and deltaic and shoreface sandstones interbedded with shales at the top. They contain hydrocarbons originating from the Bazhenov Fm (20-70 meters), considered as the major source rock in this basin. Late Jurassic siliceous layers underneath the Bazhenov black shale constitute another reservoir system of interest. Accumulations were discovered in Late/Middle Jurassic sandy reservoirs, but their oil and gas habitats remain undervalued to date. These reservoirs, affected by fracturing and deformation, are characterized by a series of anticlines and synclines structures separated by sub-vertical faults.
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3D Seismic Exploration for Oil and Gas Bearing Pinnacle Reefs inside Kamsko-kinel Throughs System–Volgo–Ural Province
Authors Y.I. Nikitin, S.V. Ostapenko and N.A. BachurinThe Upper Famenian – Lower Visean Kamsko-Kinel Troughs System control numerous oil fields within the Volga-Urals province.Due to high degree of exploration mature these throughs are considered to be of little promise for prospecting additional remarkable oil reserves. By modern 3D seismic surveys Upper Devonian pinnacle reefs were located along inner part of the Mukhanovo-Erokhov through southern margin. Reef small sizes (0.2-0.3 km2) and considerable depth occurence (more then 3.0 km) were the causesor their missing by seismic 2D before. Upper Devonian basinal isolated reefs are significant exploration play for oil and gas within Kamsko-Kinel Throughs System. 3D seismic is an exclusive technique for effective mapping of small-sized and deep-seated oil&gas bearing isolated reefs. Tectonic swells are foremost areas for prospect reefs groops
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Pre-caspian Paleozoic Deposits Modern Structure Formation Condition
Authors O.S. Obryadchikov and K.M. TaskinbayevAnnotation. Seismic works and deep boring materials analysis points out penecontemporaneous formation of Astrakhan-Aktubinsk uplift zones (AAUZ) and absence of cuttings at the culms of atoll like carbon-bearing solid masses as of Tengiz type. Soline thikness accumulation of Kungurian age tookplace at deep-water basin (the depth in the central areas of Pre-Caspian lacune exceeds 1,5 km). Seismic works materials interpretation within AAUZ limits assumes existing of trottoir s at docungur cuttings. Coincidence in plane of these “ reefs” is seen and salt-dome structure s that contradicts peculiarities of such formations
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Western Laptev Sea Region Framework–Structural Style and Timing of Deformation
Authors V.E. Verzhbitsky and A.K. KhudoleyThe Laptev Sea region is one of the remote and geologically complex areas of Russian Eastern Arctic. According to the existing seismic data, a number of large offshore sedimentary basins with significant proposed hydrocarbon potential, were revealed on its shelf. No offshore wells were drilled there so far, thus all the information on the regional geology, is based on the very limited amount of marine seismic profiles and our knowledge on adjoining near-coastal areas. This study is based on the series of field works 2008-2009, carried out as a part of TGS-NOPEC Geophysical Company / St Petersburg State University joint project on Geology and Hydrocarbon systems of Northern Siberia. The field observations were done in the Laptev Sea framework, including Taimyr, Verkhoyansk and Olenek fold belts, Siberian craton, Enisey-Khatanga and Anabar-Lena depressions. Here we present some results of structural investigations of the Paleozoic-Mesozoic sedimentary complexes, exposed on Southeastern Taimyr, Bolshoy Begichev Island and Paksa Peninsula/Anabar River mouth. It is shown, that the final stage of compressional deformation in the Western Laptev Sea Region corresponds to Late Kimmerian and so is roughly synchronous with those on the rest of Eastern Arctic area, including New Siberian Islands, Chukotka and Brooks Range.
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Geologic Interpretation of Basic Seismic-acoustic Attributes for Developing a Geodynamic Model of Chukot Earth’s Crust
Authors E.Y. Goshco, A.V. Migursky and A.S. SalnikovSeismic-acoustic inversion of the CDP section of the 2-DV-A reference profile running from the Pevek (Chaun Bay) to the Valunistoye (Central Chukot) has resulted in basic dynamic and geometrical characteristics such as an average reflector dip, and integral reflector energy. It is established that the behavior of a crust-mantle layer «Moho» is quite accurately observed on the seismic acoustic section. The integral energy section appears to be useful for identifying crustal blocks. The analysis of reflector dips on the 2-DV-A profile has shown that in its northwestern part (0–200 km) in the crystalline crust the inclination of reflections prevails obviously to the southeast. In the interval of 200-205 km in the crystalline crust and uppermost mantle, the vertical column of reflections with the northwestern inclination serving as a sharp boundary between large blocks of the Chukchi microcontinent has shown itself clearly. From 390 to 520 km the northwestern reflector inclinations are dominant in the crystalline crust, which corresponds to the movement of microblocks of the Koryak accretionary belt. The use of basic seismic-acoustic attributes for geologic interpretation has supported the validity of the developed deep geologic-tectonic model of the earth’s crust of the northern and central Chukchi microcontinent.
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Geologies Items of Detection Perspective Squares of Indolo–Kuban Basin and there Relation with Oil and Gas Saturation
Authors A.A. Bolshakov and A.A. NikitinThe basic geological criteria of the regional forecast of hydrocarbon saturation of Indolo-Kuban sedimentary basis were considered. These geological criteria allow to allocate oil-and-gas perspective areas the Indolo-Kuban sedimentary basin. Oil-and-gas field, which were opened in the last decade, confirm hydrocarbon saturation this region
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Our Knowledge of France’s Sedimentary Basins Benefits from an Exceptional Update due to a Proliferation of Deep Basin de
Authors A. Bialkowski, S. Gabalda, E. Lasseur, C. Rigollet, O. Serrano and C. TruffertThe principal sedimentary basins of France result from a succession and/or combination of extensional or compressive and thermal mechanical evolution controls during the Alpine Cycle. The sediments filling these basins can be subdivided into second-order sequences recording the major geodynamic events that have marked the Mesozoic and Cenozoic geological history of Western Europe. The Mesozoic and Cenozoic sedimentary basins have been worked since antiquity for their multiple resources and have been the subject of outstanding geological syntheses since the 18th century. At the beginning of the 20th century, the geological information extracted the first deep water wells, combined with the cartographic data, gave us a three-dimensional picture of the basins. Thereafter, the proliferation of oil-exploration, gas-storage and geothermal-energy projects provided, in particular, 350,000 km of seismic lines and 6000 deep boreholes. France’s sedimentary basins are today basins for which we have a large amount of diversified data. They thus provide excellent playing fields for developing modern methodologies for 3D reconstruction of the deep geology by virtue of major societal projects and extensive scientific debate on the sedimentary recording of geodynamic events.
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Deep Geologo-geophysical Criteria of the Regional and Local Hydrocarbon Prognosis
Authors A. A. Nikitin and D.P. ZemtsovaThere are considered deep geological and geophysical criteria for hydrocarbon prognosis on the base of new oil and gas generation concepts (polygenic genesis, geosoliton emission, hidritic Earth, mantle structures) and are defined integrated geophysical tehnologies for their determination.
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Irregularity of Energy Resources Distribution
Authors Y.K. Burlin and A.V. StoupakovaGlobal resources of hydrocarbons and other (coal, woods, water, etc.) energy sources are distributed irregularly. This depends upon geotectonic position of the region, historical and today’s climatic conditions, and upon some other reasons. Main resources are located in the large troughs of the Earth crust (sedimentary basins) with thick layer of deposits. Today most famous of them are Persian Gulf with vast adjacent territories, Near-Caspian Depression with the northern part of the Caspian Sea, Barents Sea, Western Siberia (central and northern regions) and adjacent offshore area of the Kara Sea. Mexican Gulf with its not yet fully explored resources is also included into this largest category. Further investigations will lead to discoveries of similar large basins in the Arctic too
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Recognition of Late Aptian Relative Sea Level Drop in West Siberia Basin
Authors A.L. Medvedev, C.R. Handford, A.Y. Lopatin, Y.V. Masalkin and M.N. NikolaevLate Aptian relative sea level 100-120m drop and associated regional unconformity (sequence boundary 1) identified in Western Siberia. Incised Valley System of Krasnoleninskiy Arch is an indicator of this drop.
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Relative Sea–level Changes in Cratonic Basins–Tectonics or Eustasy
Authors E.V. ArtyushkovLarge changes of the depth of water of a third order in cratonic basins, up to 100-200 m during 1-3 Ma, are commonly supposed to be of a eustatic origin. Continuous deposition took place at a depth of ≤ 10-20 m in East Siberia in the Ordovician and Silurian, East Baltic in the Cambrian and Ordovician, and in the East European Platform in the Pennsylvanian and Early Permian. Modelling of changes in the depth of water in these regions under sea-level fluctuations of a third order has shown that over the predominant part of the above epochs such fluctuations did not exceed 20-30 m. Under such circumstances, large-scale regressions and transgressions, 1-3 Ma long, in cratonic basins should be attributed to rapid vertical crustal movements. For example, the crustal uplift of ~ 200 m followed by the subsidence to the initial level occurred on the shelf in the western part of the East European Platform in the earliest Pennsylvanian. Numerous stratigraphic traps were formed due to regressions and transgressions of a third order. In each hydrocarbon basin, their prospecting requires the studies of time and space distribution of rapid vertical crustal movements in the basin and in the adjacent areas.
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Sequence-stratigraphy in Studying the Structure and Petroleum Potential of a Sedimentary Cover
Authors L.S. MargulisThe report is prepared on the example of the sedimentary basins of the Pacific margin Russian sector; the most part of them is located in the offshore (Tatar strait, the Sea of Okhotsk, the Bering Sea). Factual material is represented by seismic survey and drilling data and also the data of observations by the sections of a sedimentary cover in outcrops. The basins are filled in Cenozoic deposits; they are characterized by the high velocity of sedimentation and a dislocated sedimentary cover. It determined the specificity of a sequence analysis. Sedimentary covers are divided by unconformity surfaces into structural-stratigraphic complexes. The last correspond to transgressive-regressive cycles of duration of 5-25 million years; by a volume they are close to supercycles (cycles of 2-nd order) of a sequence-stratigraphical scale. Sequences (cycles of 3-rd order) are determined only in the separate parts of the section; but their mapping is decisive for paleogeographical reconstructions, reconstituting the sedimentation structure of a sedimentary cover and the arrangement of hydrocarbon systems.
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Paleozoic Carbonate Platform in the Barents Sea East
Authors M.I. Leonchik and B.V. SeninWave field anomalies detected in seismic lines in Upper Devonian – Lower Permian terrigenous – carbonate deposits of the Barents Sea are typical of marginal reefs and carbonate scarps. Seismic data analysis allowed us to outline possible areas of carbonate scarps development. There are mainly confined to steps and terraces of the ancient continental shelf and fringe deepwater non-compensated basins of the East Barents Trough and adjacent depressions. Elaborated regional paleo-environmental map for Late Devonian – Early Carboniferous of the Barents Sea Area was constructed on the base of seismic interpretation data and the results of the Sea bottom and onshore area geological and geophysical surveys. The geologic – geophysical data comparison revealed a noticeable resemblance of structural – geological and sedimentary characteristics of Upper Devonian – Lower Permian basins in the East Barents Trough and PriCaspian Depression. Thus there could be condition in the East Barents Sea Trough and its borders favorable for development of both carbonate – clayey oil source rocks and oil promising sedimentary traps in the form of reefs, confined to marginal scarps of carbonate platform and to the inner carbonate shelf.
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Paleo-environment and Regional Oil Prospectivity of Triassic Deposits in the Barents Sea
Authors B.V. Senin and M.I. Leonchikarly, Middle and Late Triassic depositions are reconstructed and the areas of the possible Triassic source rock development are mapped. It is marked that these areas had been forming during the entire Triassic in the deepest parts of the East Barents Trough where its sections is most complete. New zones of litological and structure - litological traps development within south-western and central part of the South Barents basin are outlined. The research results indicate rather high probability of new oil discoveries in Triassic deposits of the Barents Sea, particularly within board and uplifted zones of deep trough. Oil pool may be confined to sandy, siltstone – sandy or sandy – pebble reservoirs in litological and structure - litological traps.
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Geology and Total Petroleum System of the East Barents Basin Province
Authors J.K. Pitman and T.R. KlettThe petroleum resource assessment of the East Barents Basin Province, recently completed by the U.S. Geological Survey, is based on the Total Petroleum System concept, which includes knowledge of source, reservoir, and seal rocks, and timing of petroleum generation, migration, and accumulation. Using this approach, the mean undiscovered, conventional, petroleum resource in the province is estimated to be approximately 62 billion barrels of oil equivalent of crude oil, natural gas, and natural gas liquids.
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