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  • 1
    Online Resource
    Online Resource
    Geochemical and hydrogeological parameters informativity in oil and gas geology
    Georesursy LLC ; 2021
    In:  Georesursy Vol. 23, No. 2 ( 2021-5-25), p. 214-220
    Details
    In: Georesursy, Georesursy LLC, Vol. 23, No. 2 ( 2021-5-25), p. 214-220
    Abstract: The article discusses the fundamental possibilities of using the results of geochemical and hydrogeochemical studies of organic matter, oils and waters in oil and gas geology, including for objects at the stage of development. It is shown that complex geochemical studies of oils and waters make it possible to get more correct conclusions about the presence or absence of fluid-dynamic connectivity of different horizons. Studies of organic matter and oils allow (by basin modeling instrument) to understand the contribution of different source rocks to formation of oils of different reservoirs. Hydrogeochemical studies of associated waters and waters used in the reservoir pressure maintenance system in a complex of works not only actively complements the knowledge about the presence or absence of fluid-dynamic connections between reservoirs and production objects, but also make it possible to predict, for example, salt deposition on equipment and in the reservoirs, and therefore allow you to prevent the possibility of unwanted salt deposition. The conclusions are based on the results of comprehensive geological and geochemical studies carried out by the authors for one of the deposits of the Krasnoleninsky arch of Western Siberia, which is at the development stage, as well as on the previous experience of the authors.
    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.2021.2.21
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2921422-1
    SSG: 13
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  • 2
    Online Resource
    Online Resource
    Oil sources of the Krasnoleninskoe field
    Georesursy LLC ; 2023
    In:  Georesursy Vol. 25, No. 2 ( 2023-6-30), p. 161-182
    Details
    In: Georesursy, Georesursy LLC, Vol. 25, No. 2 ( 2023-6-30), p. 161-182
    Abstract: There is no consensus on the role of different source rocks (SRs) in the formation of the Krasnoleninskoe field. The main Upper Jurassic-Early Cretaceous SR of Western Siberia is represented on the Krasnoleninsky arch by the Tutleim formation (fm) (J3tt–K1v). It is overlain by argillaceous rocks of the Frolov fm (K1v–K1a), underlain by the Abalak (J2cl–J3km), Tyumen (J2a-b), Sherkalin (J1) formations and folded pre-Jurassic basement. All these formations potentially contain SR layers. The purpose of the article is to determine the sources of oil in the Krasnoleninskoe field by comparing oils with SRs and to determine of the history of oil composition formation. Based on a review of known geochemical parameters and the results of statistical analysis new molecular parameters for determining the type of organic matter (OM) and its maturity are proposed. A secondary processes of the oils of the Vikulov fm of the Kamennaya crest has been established, which is associated with the migration of hydrocarbons from the Vikulov fm to the overlying deposits. It is shown that the oils of the Vikulov fm of Kamennaya crest were formed from the SR, which was at the MC2 substage during the generation of hydrocarbons, and the oils of the Jurassic and pre-Jurassic deposits were formed on the end of MC2-beginning of MC3 substages. It was determined that the oils of Kamennaya crest have aquatic initial OM, aquatic OM was found in the Tutleim and Tyumen SRs. According to the criteria of OM type and its maturity, the source of Kamennaya crest oils cannot be determined; therefore, genetic features of the difference between the aquatic OM of the Tyumen and Tutleim formations were found. These features made it possible to estimate the source of oils for different parts of the Krasnoleninskoe field: for Kamennaya crest the Tutleim fm, for the Talinskaya area the Tyumen fm, for the Em-Egovskaya area, the Tyumen and Tutleim formations. Estimation of the contribution of the Sherkalin and Abalak SRs to the formation of hydrocarbon accumulations is beyond the scope of current work.
    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.2023.2.12
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2921422-1
    SSG: 13
    Location Call Number Limitation Availability
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Identification of the features of the organic matter of oils and source rocks based on a comparison of the results of geochemical analysis with statistical analysis built upon machine learning methods: the case of one field of the West Siberian basin
    Georesursy LLC ; 2022
    In:  Georesursy Vol. 24, No. 2 ( 2022-5-16), p. 217-229
    Details
    In: Georesursy, Georesursy LLC, Vol. 24, No. 2 ( 2022-5-16), p. 217-229
    Abstract: The idea of this work is to compare the results of geochemical and statistical analyzes in the study of organic matter in extracts of oil and gas source rock. The object of the study were the samples of oil and gas source rocks of the Tutleim and Tyumen Formations, as well as oil samples of the Vikulov Formation and Jurassic and pre-Jurassic deposits in the western part of the West Siberian basin. Among the methods of statistical analysis, the principal component method and the random forest method were used. A heat map of correlations was used as visualization tools. The principal component method helped us to reveal a clear difference between the organic matter of the Tutleim and Tyumen source rocks. The random forest method and the heat map made it possible not only to identify the distinctive geochemical properties for this strata, but also reveals the geological factors of their distinction. Thus, the organic matter of Tyumen source rock turned out to be more mature and it has relatively larger contribution of terrestrial organic matter compared to the Tutleim one. The same set of methods is applied to oil-source rock correlation. The oils of the Vikulov Formation obviously originate from the Tutleim source rock. Oils of Jurassic and pre-Jurassic reservoirs have a predominant contribution of the Tutleim source rock and some similarity (up to 30 %) with the Tyumen one. Oils from the Vikulov Formations are less mature than oils from the Jurassic and pre-Jurassic rocks. This may indicate the continued migration of hydrocarbons to Jurassic and pre-Jurassic deposits and the cessation of migration in the past to the overlying Aptian–Albian Vikulov Formation. Geochemical analysis also revealed the geochemical properties responsible for the maturity of source rocks and the type of organic matter. It confirmed the conclusions made on the basis of the application of methods of statistical analysis.
    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.2022.2.20
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2921422-1
    SSG: 13
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Fluid-dynamic concept of oil and gas generation. Principles (discussion)
    Georesursy LLC ; 2022
    In:  Georesursy Vol. 24, No. 2 ( 2022-5-16), p. 24-28
    Details
    In: Georesursy, Georesursy LLC, Vol. 24, No. 2 ( 2022-5-16), p. 24-28
    Abstract: The Principles of the fluid-dynamic concept of oil and gas formation, which expands the ideas of the previously proposed of the same name model in co-authorship, are presented. The base of the concept – simultaneity of processes, which, in the presence of a significant vertical flow of fluids and heat, cause the emergence of structures, a new reservoirs and new dynamic barriers, oil and gas formation and the formation of deposits. The formation of certain types of sedimentary basins and then the selective formation of their “traditional industrial” oil and gas content from predominantly fossilized living matter are predetermined by the development of deep, not only specific crustal, but also mantle processes. Based on the theory of open non-equilibrium systems, the concept assumes vertical tectono-petrological stratification and alternation of de-compaction and compaction zones in the lithosphere and upper mantle, when disclosed, “catastrophic” heat-mass transfer of fluids from de-compacted zones and pulsation oil formation are carried out not from the entire source organic matter, but only from the oil “semi-finished product”, and not from the basin as a whole, but in its individual parts.
    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.2022.2.5
    Language: English
    Publisher: Georesursy LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2921422-1
    SSG: 13
    Location Call Number Limitation Availability
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    Online Resource
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