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  • 1
    Online Resource
    Online Resource
    Conditions of formation and forecast of natural reservoirs in clinoform complex of the Lower Cretaceous of the Barents-Kara shelf
    Georesursy LLC ; 2019
    In:  Georesursy Vol. 21, No. 2 ( 2019-5), p. 63-79
    Details
    In: Georesursy, Georesursy LLC, Vol. 21, No. 2 ( 2019-5), p. 63-79
    Abstract: Unique Leningradsky and Rusanovsky gascondensate fields in the Barrem-Cenomanian layer are discovered in the Kara Sea. Non-industrial accumulations of oil and gas have been discovered in the Lower Cretaceous sediments of the western part of the Barents Sea shelf. However, the structure and oil and gas potential of the Lower Cretaceous sediments of the Barents-Kara shelf remain unexplored. Based on the seismic-stratigraphic and cyclostratigraphic analysis, a regional geological model of the Lower Cretaceous deposits of the Barents-Kara shelf was created, the distribution area and the main stages of the accumulation of clinoforms were identified. As a result of a detailed analysis of the morphology of clinoform bodies, paleogeographic conditions were restored in the Early Cretaceous and a forecast of the distribution of sandy reservoirs was given
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2019.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2019.2.63-79
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2019
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  • 2
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    Online Resource
    Conditions of sedimentation and distribution of organic matter in the Lower-Middle Jurassic complex of the South-Western part of the West Siberian oil and gas basin
    Georesursy LLC ; 2022
    In:  Georesursy Vol. 24, No. 2 ( 2022-5-16), p. 150-171
    Details
    In: Georesursy, Georesursy LLC, Vol. 24, No. 2 ( 2022-5-16), p. 150-171
    Abstract: The article is devoted to the variation of generation potential of the Lower-Middle Jurassic organic matter in the Karabash area (South-Western part of the West Siberian basin) depending on facies and sedimentary cyclisity. Based on geochemical and lithological core studies, specific geochemical features of organic matter established for main facies groups of Early-Middle Jurassic in the study area. The best generation potential inherent in deposits of swamps, swampy floodplains and tidal plains. These facies groups characterized by predominance of the continental organic matter and considered to gas source rocks. However, macerals composition, kinetic spectra and biomarker analysis show the presence also of marine organic matter. Some facies groups, such as flooded swamps and swampy floodplains has potential to generate hydrocarbons due to preservation of liptinites with high hydrogen index. Cyclic analysis with basics of sequence stratigraphy of the continental deposits allow tracing the correlation between generation potential and relative sea level changes.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2022.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2022.2.15
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2921422-1
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  • 3
    Online Resource
    Online Resource
    Criteria of petroleum potential of a sedimentary basin
    Georesursy LLC ; 2023
    In:  Georesursy Vol. 25, No. 2 ( 2023-6-30), p. 5-21
    Details
    In: Georesursy, Georesursy LLC, Vol. 25, No. 2 ( 2023-6-30), p. 5-21
    Abstract: The criteria of petroleum potential of a sedimentary basin are the features that characterize the evolution of a hydrocarbon system as a geological unit. There are basic and additional criteria of oil and gas potential. Without basic criteria, the functioning of the hydrocarbon system and consequent petroleum field formation is impossible. Additional criteria characterize qualitatively and quantitatively properties of the basic criteria. The properties of all basic criteria are ordered by genesis and summarized in a system that allows to quickly and accurately establish a relationship between them and classify them. The system can be used to select quantitative parameters for geological simulation of different scales, but also for automated applying for petroleum exploration and production. At the same time, the classification of basic criteria can be used at all stages of exploration. At the prospecting stage, when the type of sedimentary basin and the sedimentary conditions are recognized with some uncertainty, it is possible to predict the properties of source rocks, reservoirs, types of traps and seals. If all static basic criteria, such as source rock, reservoir, seal and trap, are available, it is possible to simulate the formation of petroleum fields, including generation, migration, accumulation and subsequent post-accumulation processes. At the stage of exploration and development, the classifications will help to verify the geological and hydrodynamic models of the field, taking into account the link to the regional and local structural plans and correctly identify the geological features of the study object and select the geological analogues.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2023.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2023.2.1
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2023
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  • 4
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    Online Resource
    Geology and geochemistry of Riphean-Vendian petroleum system (the Northern part of the Volga-Ural Basin)
    Georesursy LLC ; 2021
    In:  Georesursy Vol. 23, No. 2 ( 2021-5-25), p. 73-86
    Details
    In: Georesursy, Georesursy LLC, Vol. 23, No. 2 ( 2021-5-25), p. 73-86
    Abstract: Riphean-Vendian Petroleum system of Volga-Ural Basin (Northern part, Kama-Belsky aulakogen) main elements are described. Reservoirs and properties of them (porosity and permeability), source rocks are characterized geochemically by results of pyrolysis, extraction, gas chromatography. To understand the conditions of Volga-Ural Proterozoic petroleum system formation were analyzed lots of publications and collected huge dataset (regional geological data, seismic, well data, geochemical data and so on). Were made maps of Riphean-Vendian tectonics and location in North part of Volga-Ural Basin. The main characteristics important for petroleum system formation and oil and gas prospects estimation were indicated.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2021.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2021.2.7
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2021
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  • 5
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    Online Resource
    Depositional environments as a framework for genetic classification of the basic criteria of petroleum potential
    Georesursy LLC ; 2023
    In:  Georesursy Vol. 25, No. 2 ( 2023-6-30), p. 75-88
    Details
    In: Georesursy, Georesursy LLC, Vol. 25, No. 2 ( 2023-6-30), p. 75-88
    Abstract: Most classifications of reservoirs, seals and source rocks based on the ability of the rock to generate, accumulate and preserve hydrocarbons, and the genesis of rocks is not always taken into account. The article presents a ranking scheme for continental, coastal-marine and marine sedimentation environments that determine the genesis and properties of the basic criteria of petroleum potential – source rocks, reservoirs, seals and pinch-out traps. Rocks, which can consider as source rock, reservoirs and seals are formed in each depositional environment. However, their structure, mineral composition and distribution area will differ from each other depending on the sedimentary environment and conditions. A combination of elements of the hydrocarbon system formed, corresponding to the sedimentation environment and are characteristic for basins of various types. Continental environments are favorable for the formation of reservoirs and local seals, while the accumulation of source rocks limited by lacustrine, floodplain, and swamp facies. The coastal-marine environment is favorable for the formation of all the basic criteria of petroleum potential, and the transgressive-regressive cyclicity determines the interbedding of source rocks, reservoirs and seals in the section. The marine depositional environments are most favorable for the formation of regional seals and source rocks, including high-carbon formations. The proposed ranking scheme of sedimentary environments and the basic criteria of petroleum potential genetically related to them is applicable in system analysis and selection for analogues of petroleum system elements in sedimentary complexes formed in similar depositional environments.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2023.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2023.2.6
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2023
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  • 6
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    Online Resource
    Structure and petroleum prospects of the northern part of the Barents-Kara Sea region
    Georesursy LLC ; 2023
    In:  Georesursy Vol. 25, No. 2 ( 2023-6-30), p. 47-63
    Details
    In: Georesursy, Georesursy LLC, Vol. 25, No. 2 ( 2023-6-30), p. 47-63
    Abstract: The geological structure and the petroleum potential of the western part of the Russian Arctic shelf are still matter for disputes, especially due to the absence of deep drilling and scarce data. One of the key problems in assessing the petroleum potential of the North Kara Sea Basin and the adjacent North Barents Sea Basin is the lack of a proven stratigraphic model of the sedimentary cover. The article presents a model of the structure of the sedimentary cover of the northern part of the Barents-Kara Sea region based on the analysis of the regional seismic data and comparison with outcrop sections of the archipelagos and adjacent land. The structure of the archipelagos is determined by tectonic events and rearrangements, which also reflect on the structure of the offshore sedimentary basins. In the structure of the northern part of the Barents-Kara Sea region, three large structures can be distinguished: North Barents Sea Basin, East Barents Steps, and North Kara Sea Basin. The East Barents Steps formed during Baikal orogeny and in the Riphean-Early Paleozoic time were uplifted, and separated the North Barents Sea and North Kara Sea basins. The North Kara Sea Basin was probably formed in the Riphean and subsided in the Early Paleozoic, while the section of the North Barents Sea Basin is composed of a thick of Upper Paleozoic-Mesozoic sequence. In the Permian-Triassic time, the western slope of the East Barents Uplift was involved in the intensive subsidence of the North Barents Sea Basin and transformed to the steps, while the Lower Paleozoic succession were buried under a thick Permian-Triassic sequence. In the sedimentary cover of the northern part of the Barents-Kara shelf, four promising petroleum plays can be distinguished: pre-Upper Devonian, Upper Devonian-Lower Carboniferous, Permian-Triassic, and Jurassic-Cretaceous. Pre-Upper Devonian promising petroleum complex within the study area are distinguished only in the North Kara Sea Basin, and hydrocarbon systems within it can be similar to hydrocarbon systems in the basins of the ancient platforms.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2023.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2023.2.4
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2023
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  • 7
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    Online Resource
    Sedimentation of the Oligocene-Lower Miocene clinoforms of the Maikop formation in the Eastern and Central Pre-Caucasus region as a key criteria for reservoir exploration
    Georesursy LLC ; 2022
    In:  Georesursy Vol. 24, No. 2 ( 2022-5-16), p. 192-208
    Details
    In: Georesursy, Georesursy LLC, Vol. 24, No. 2 ( 2022-5-16), p. 192-208
    Abstract: Oligocene-Lower Miocene clinoforms of the Maikop formation are productive in the Eastern and Central Pre-Caucasus region. In spite of commercial discoveries and long exploration history, Maikop formation is poor characterized by borehole data in the deep basins such as Terek-Caspian trough. Furthermore, there are challenges of the detail stratigraphic subdivision in the deep basins, correlation, sedimentary conditions and criteria of reservoirs exploration. Based on seismic and borehole data analysis, sequent-stratigraphic framework, distribution area, progradation direction, seismic unconformities and thicknesses of the 17 Maikop sequences are established. Estimation of the clinoforms height allowed reconstructing paleobathymetry and paleogeography of the Pre-Caucasus region in the Oligocene – Early Miocene. Clinoforms M1-M7 prograded from the northeast, sea depth increased from 300 to 450 m. During clinoforms M8 sedimentation, new provenance area appeared on the west, sea depth increases up to 800 m. Clinoforms M12-M16 prograded from the north, sea depth decreases from 480 to 270 m. To the end of the M17 sequence deposition, starved deep basin was totally compensated. Three morphologic types of the clinoforms are identified. Type I represents by tangential clinoforms up to 75 m of height, that interpreted as subaqueous delta. Type II are the sigmoid shelf-edge delta clinoforms up to 800 m of height. Clinoforms of type III are low-angle wedges, confined to the slope and floor of the deep basin. Height of the wedges does not exceed 270 m. In the topset of the shelf-edge deltas, shallow-marine sandstones and structural traps predicted, while basin floor fans and stratigraphic traps expected in the bottomset. Subaqueous deltas are regarded to stratigraphic traps, while the wedges are predominantly mud-prone.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2022.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2022.2.18
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2022
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  • 8
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    Online Resource
    Structural reconstructions effect on oil and gas formation of the Yenisei-Khatanga trough eastern part
    Georesursy LLC ; 2022
    In:  Georesursy Vol. 24, No. 2 ( 2022-5-16), p. 93-112
    Details
    In: Georesursy, Georesursy LLC, Vol. 24, No. 2 ( 2022-5-16), p. 93-112
    Abstract: The article presents the results of research on the influence of structural reconstructions on the hydrocarbon systems evaluation in the eastern part of the Yenisei-Khatanga trough. Based on seismic data interpretation and paleoprofiles construction, several stages of structural reconstructions in the geological evolution of the basin are established: at the Middle and Late Triassic boundary, Late Triassic and Jurassic boundary, in the Bathonian-Callovian time, Tithonian-Valanginian time, in the Barremian-Aptian time, in the Aptian-Albian time, in the Cenomanian time, and powerful reconstructions in the Cenozoic era. Based on interpretation of geochemical information of the well-core and outcrops, the characterization of the type of organic matter, the amount of initial organic carbon, the oil and gas source potential for the Late Triassic, Lower Jurassic, Middle Jurassic, Upper Jurassic, Lower Cretaceous oil and gas source rocks is given. The results of exploration of the geological structure of the region, the geochemical features of oil and gas source rocks became the basis for building a 2D basin model, which made it possible not only to identify generation kitchen, migration routes and accumulation zones of hydrocarbon fluids, but also to estimate the start time of generation and emigration of hydrocarbons, as well as the moments of interruption of these processes during periods of uplifting of the territory. Changes of the structural plan transformed the configuration of the basin, which led, on the one hand, to the formation of areas where rich in organic matter interlayers accumulated, and, on the other hand, to the interruption of hydrocarbon systems evaluation, reconfiguration and even destruction of deposits.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2022.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2022.2.11
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2022
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  • 9
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    Structural reconstructions of the Eastern Barents Sea at Meso-Tertiary evolution and influence on petroleum potential
    Georesursy LLC ; 2021
    In:  Georesursy Vol. 23, No. 1 ( 2021-3-30), p. 78-84
    Details
    In: Georesursy, Georesursy LLC, Vol. 23, No. 1 ( 2021-3-30), p. 78-84
    Abstract: Barents Sea basin is the most explored and studied by the regional and petroleum geologists on the Russian Arctic shelf and has approved gas reserves. However, there are many questions in the petroleum exploration, one of them is the structural reconstruction. During its geological evolution, Barents Sea shelf was influenced by the Pre-Novaya Zemlya structural zone that uplifted several times in Mesozoic and Cenozoic. The main goal of the research is to clarify the periods of structural reconstructions of the Eastern Barents shelf and its influence on the petroleum systems of the Barents Sea shelf. A database of regional seismic profiles and offshore borehole data collected over the past decade on the Petroleum Geology Department of the Lomonosov Moscow State University allows to define main unconformities and seismic sequences, to reconstruct the periods of subsidence and uplifts in Mesozoic and Cenozoic. The structural reconstructions on the Eastern Barents Sea in the Triassic-Jurassic boundary led to intensive uplifts and formation of the huge inversion swells, which is expressed in erosional truncation and stratigraphic unconformity in the Upper Triassic and Lower Jurassic strata. In the Jurassic period, tectonic subsidence reigned on the shelf, when the uplifts including the highs of Novaya Zemlya were partially flooded and regional clay seal and source rocks – Upper Jurassic «black clays» – deposited on the shelf. The next contraction phase manifested itself as a second impulse of the growth of inversion swells in the Late Jurassic-Early Cretaceous. Cenozoic uplift of the Pre-Novaya Zemlya structural zone and the entire Barents Sea shelf led to significant erosion of the Mesozoic sediments, on the one hand, forming modern structural traps, and on the other, significantly destroying the Albian, once regional seal.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/10.18599/grs.2021.1
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2021.1.8
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2021
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  • 10
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    Online Resource
    Generation potential, distribution area and maturity of the Barents-Kara Sea source rocks
    Georesursy LLC ; 2021
    In:  Georesursy Vol. 23, No. 2 ( 2021-5-25), p. 6-25
    Details
    In: Georesursy, Georesursy LLC, Vol. 23, No. 2 ( 2021-5-25), p. 6-25
    Abstract: Identification of the source rock potential and distribution area is the most important stage of the basin analysis and oil, and gas reserves assessment. Based on analysis of the large geochemical and geological data base of the Petroleum geology department of the Lomonosov Moscow State University and integration of different-scale information (pyrolysis results and regional palaeogeographic maps), generation potential, distribution area and maturity of the main source rock intervals of the Barents-Kara Sea shelf are reconstructed. These source rocks wide distribute on the Barents-Kara Sea shelf and are characterized by lateral variability of generation potential and type of organic matter depending on paleogeography. During regional transgressions in Late Devonian, Early Permian, Middle Triassic and Late Jurassic, deposited source rocks with marine organic matter and excellent generation potential. However in the regression periods, during the short-term transgressions, formed Lower Carboniferous, Upper Permian, Induan, Olenekian and Late Triassic source rocks with mixed and terrestrial organic matter and good potential. Upper Devonian shales contain up to 20.6% (average – 3%) of marine organic matter, have an excellent potential and is predicted on the Eastern-Barents megabasin. Upper Devonian source rocks are in the oil window on the steps, platforms and monoclines, while are overmature in the basins. Lower Permian shale-carbonate source rock is enriched with marine organic matter (up to 4%, average – 1.4%) and has a good end excellent potential. Lower Permian source rocks distribute over the entire Barents shelf and also in the North-Kara basin (Akhmatov Fm). These rocks enter the gas window in the Barents Sea shelf, the oil window on the highs and platforms and are immature in the North-Kara basin. Middle Triassic shales contain up to 11.2% of organic matter, there is a significant lateral variability of the features: an excellent generation potential and marine organic matter on the western Barents Sea and poor potential and terrestrial organic matter in the eastern Barents Sea. Middle Triassic source rocks are in the oil window; in the depocenters it generates gas. Upper Jurassic black shales are enriched with marine and mixed organic matter (up to 27,9%, average – 7.3%) and have an excellent potential. On the most Barents-Kara Sea shelf, Upper Jurassic source rock are immature, but are in the oil window in the South-Kara basin and in the deepest parts of the Barents Sea shelf.
    Type of Medium: Online Resource
    ISSN: 1608-5078 , 1608-5043
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.18599/grs.2021.2
    DOI: 10.18599/georesursy
    DOI: 10.18599/grs.2021.2.1
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2921422-1
    SSG: 13
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