V.I. Popkov, I.V. Popkov
DOI: https://doi.org/10.25689/NP.2023.3.1-17
Abstract
The Triassic deposits of the Southern Mangyshlak have undergone significant post-sedimentation transformations. Modern reservoirs containing accumulations of oil and gas are, as a rule, epigenetic in nature. However, in some areas, the preservation of the primary pore capacity by rocks lying in the lower horizons of the Triassic section was found. It has been established that such reservoir layers are confined to the carbonate-terrigenous thickness of the Lower Triassic, which contains arkose sandstones, which are the product of the destruction of granitoid intrusions of the Paleozoic basement. Detailed lithological and petrographic analysis of Paleozoic and Triassic deposits allowed us to restore the paleotectonic situation of the end of the Paleozoic – the beginning of the Early Mesozoic. A previously unknown large buried uplift was revealed, which was at that time an area of erosion. Coarse-grained material accumulated on the periphery of the uplift. Its lithological and mineralogical features caused the preservation of primary pores against the background of other low-permeable sedimentary rocks composing the Triassic section. The results obtained can be used in the practice of geological exploration for oil and gas.
References
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Authors
V.I. Popkov, Dr.Sc., Professor, Member of Russian Academy of Natural Sciences, Professor of the Chair of Petroleum Geology, Hydrogeology and Geotechnical Engineering, Federal State Budgetary Educational Institution of Higher Education Kuban State University
149, Stavropolskaya st., Krasnodar, 350040, Russian Federation
E-mail geoskubsu@mail.ru
I.V. Popkov, PhD, Associate Professor, Chair of Petroleum Geology, Hydrogeology and Geotechnical, Federal State Budgetary Educational Institution of Higher Education Kuban State University
149, Stavropolskaya st., Krasnodar, 350040, Russian Federation
E-mail iv-popkov@mail.ru
For citation:
Popkov V.I., Popkov I.V. Segendyksko-Peschanomysskoe pozdnepaleozojsko-rannetriasovoe pogrebennoe podnyatie Yuzhno-Mangyshlakskogo progiba i ego neftegeologicheskoe znachenie [Segendyk-Peschanomysskoe Late Paleozoic-Early Triassic buried uplift of the South Mangyshlak trough and its oil and geological significance]. Neftyanaya Provintsiya, No. 3(35), 2023. pp. 1-17. DOI https://doi.org/10.25689/NP.2023.3.1-17.
EDN AYGERB (in Russian)