V.I. Popkov, V.V. Larichev, I.V. Popkov
DOI: https://doi.org/10.25689/NP.2023.2.47-66
Abstract
The study structures of hydrocarbon reservoirs and of the hydrogeological features of the Triassic section of the Yuzhno-Mangyshlak oil and gas bearing region showed that, unlike the overlapping deposits of the platform cover, they have a number of characteristic features that allow us to speak about the special hydrogeochemical and hydrodynamic conditions of these complexes, determined primarily by the secondary nature of their filtration-capacitance properties. The water saturation of the rock matrix, the focal nature of the development of secondary reservoirs against the background of extremely low permeability of the surrounding strata make it impossible to develop elysium flows. This causes the high sensitivity of the lower floor to various compression processes, including those caused by the intrusion of deep high-energy fluid flows. Fluid injection is accompanied by decompression of low-permeable strata, the formation of additional cracks, the formation of secondary voids of metasomatic origin. As a result, secondary reservoirs of complex morphology are formed, filled with hydrocarbons. The coincidence in terms of hydrogeochemical and hydrodynamic anomalies, areas of secondary reservoirs with distinct traces of metasomatosis and associated accumulations of oil and gas indicate their genetic relationship.
The structure of oil and gas reservoirs, as well as accompanying hydrogeological anomalies, is considered on the example of well-studied Triassic hydrocarbon deposits of Southern Mangyshlak.
References
2. Dunin V.I., Korzun A.V. Gidrogeodinamika neftegazonosnyh bassejnov [Hydrogeodynamics of oil and gas basins]. Moscow: Scientific world, 2005. 254 p. (in Russian)
3. Popkov V.I., Popkov I.V. Litogenez, kollektorskie svojstva i flyuidodinamika doplitnyh kompleksov Skifsko-Turanskoj plity [Lithogenesis, reservoir properties and fluid dynamics of additional complexes of the Scythian-Turanian plate]. Exolite – 2022. Lithology of Phanerozoic and Precambrian sedimentary complexes. Annual meeting (scientific readings). Moscow: 2022. pp. 107-109. (in Russian)
4. Timurziev A.I. Stroenie kollektorov i zalezhej UV v nizkopronicaemyh kompleksah i puti sovershenstvovaniya metodiki ih prognozirovaniya [The structure of reservoirs and hydrocarbon deposits in low-permeable complexes and ways to improve their forecasting methods]. Geology of oil and gas. 1984. No. 11. pp. 49-54. (in Russian)
5. Popkov V.I., Larichev V.V., Popkov I.V. Struktura glubokopogruzhennyh kompleksov osadochnyh bassejnov: gidrogeologicheskie anomalii i neftegazonosnost' kak sledstvie vnedreniya glubinnyh flyuidov (na primere mestorozhdenij YUzhnogo Mangyshlaka) [Structure of deep-submerged complexes of sedimentary basins: hydrogeological anomalies and oil and gas potential as a consequence of the introduction of deep fluids (on the example of the deposits of Southern Mangyshlak)]. Geotectonics. 2023. No. 3. pp. 41-66. DOI: 10.31857/S0016853X23030050 (in Russian)
6. Lukin A. E. Gipogenno-allogeneticheskoe razuplotnenie – vedushchij faktor formirovaniya vtorichnyh kollektorov nefti i gaza [Hypogenic-allogenetic decompression – the leading factor in the formation of secondary reservoirs of oil and gas]. Geol. journal. 2002. No. 4. pp. 15-32. (in Russian)
7. Palamar V.P., Popkov V.I., Rabinovich A.A. O vozmozhnosti otkrytiya zon neftegazonakopleniya zhil'nogo tipa [On the possibility of opening zones of oil and gas accumulation of vein type]. Reports of the USSR Academy of Sciences. 1981. Vol. 257. No. 4. pp. 968-970. (in Russian)
8. Popkov V.I. Razlomy zemnoj kory ne tol'ko kanaly migracii, no i zony akkumulyacii nefti i gaza [Faults of the Earth's crust are not only migration channels, but also oil and gas accumulation zones]. Geology, geography and global energy. 2012. No. 3. pp. 136-141. (in Russian)
9. Larichev V.V., Popkov V.I., Popkov I.V. Gidrohimicheskie usloviya glubokopogruzhennyh neftegazonosnyh kompleksov [Hydrochemical conditions of deep-submerged oil and gas complexes]. Geology, geography and global energy. 2013. No. 4 (51). pp. 101-112. (in Russian)
10. Larichev V.V., Popkov V.I., Popkov I.V. Gidrohimicheskij oblik plastovyh vod mestorozhdeniya Ojmasha [Hydrochemical appearance of reservoir waters of the Oymasha deposit]. Geology, geography and global energy. 2020. No. 2 (77). pp. 51-59. (in Russian)
11. Pronyakov V.A. Emkostno-fil'tracionnye svojstva kollektorov doyurskih obrazovanij YUzhnogo Mangyshlaka [Reservoir filtration properties of reservoirs of pre-Jurassic formations of Southern Mangyshlak]. Problems of search and development of oil fields of Southern Mangyshlak. Grozny: Sevkavnipineft, 1983. pp. 11-13. (in Russian)
12. Medvedev S.A., Popkov V.I. Genezis vod glubokih gorizontov neftegazonosnyh bassejnov molodoj platformy yuga SSSR [Genesis of waters of deep horizons of oil and gas basins of the young platform of the south of the USSR]. Sovetskaya geologiya. 1986. No. 6. pp. 118-125. (in Russian)
13. Popkov V.I., Larichev V.V. Flyuidodinamicheskie osobennosti glubokopogruzhennyh neftegazonosnyh kompleksov [Fluid dynamic features of deep-submerged oil and gas complexes]. Geology, geography and global energy. 2016. No. 4. pp. 88-92. (in Russian)
14. Popkov V.I. Deflyuidizaciya nedr i neftegazonosnost' glubokopogruzhennyh tolshch [Defluidization of subsurface and oil and gas potential of deep-submerged strata]. New ideas in geology and geochemistry of oil and gas. Oil and gas basins as self-developing nonlinear systems. Moscow: MSU, 1999. pp. 202-203. (in Russian)
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, 350000, Russian Federation
E-mail: geoskubsu@mail.ru
V.V. Larichev, PhD, Dr.Sc. Candidate, Chair of Petroleum Geology, Hydrogeology and Geotechnical Engineering, Federal State Budgetary Educational Institution of Higher Education Kuban State University
149, Stavropolskaya st., Krasnodar, 350000, Russian Federation
E-mail: geoskubsu@mail.ru
I.V. Popkov, PhD, Associate Professor, Chair of Petroleum Geology, Hydrogeology and Geotechnical Engineering, Kuban State University
149, Stavropolskaya st., Krasnodar, 350000, Russian Federation
E-mail: iv-popkov@mail.ru
For citation:
Popkov V.I., Larichev V.V., Popkov I.V. Stroenie i usloviya formirovaniya rezervuarov nefti i gaza v triasovyh otlozheniyah Yuzhnogo Mangyshlaka [Structure and conditions of formation of oil and gas reservoirs in the Triassic deposits of Southern Mangyshlak] Neftyanaya Provintsiya, No. 2(34), 2023. pp. 47-66. DOI https://doi.org/10.25689/NP.2023.2.47-66. EDN FVLRRI (in Russian)