V.N. Savinov, T.V. Aleksandrova
Potential for new hydrocarbon field discovery in Proterozoic deposits of Volga-Urals Region
DOI 10.31087/0016-7894-2023-2-37-51
Ключевые слова: Vendian and Riphean deposits; fractured-cavernous reservoir; porosity; permeability; impermeable bed; source rock; petroleum potential of Upper Proterozoic rocks; Volga-Urals region.
Для цитирования: Savinov V.N., Aleksandrova T.V. Potential for new hydrocarbon field discovery in Proterozoic deposits of Volga-Urals Region. Geologiya nefti i gaza. 2023;(2):37–51. DOI: 10.31087/0016-7894-2023-2-37-51. In Russ.
Modest progress in the Vendian-Riphean deposits development in Volga-Urals region are related to the low and nonuniform drilling exploration maturity of these sequences in the area and in the section, scattered and inaccessible geological and geophysical data of various years, absence of the common stratigraphic breakdown and correlation of the Precambrian series (not least because of the lack of parametric matching of the column), insufficient information content of drilling data. All the mentioned factors cause high subsoil user risks and unprofitability of development. The authors present the composite lithologic and stratigraphic section of sedimentary Proterozoic deposits in the Kama Region. They identify the key patterns of oil and gas occurrence in the Upper Proterozoic deposits of the north of the Volga-Urals region. The paper contains the results of petrophysical studies on 1628 samples (taken from 112 wells) for the purpose of studies of Riphean-Vendian reservoir properties. The authors note that fracturing of the Riphean carbonate rocks has a great influence on their porosity and permeability. Resulting from the studies, fractured reservoirs are identified in the Arlansky member of Lower Riphean Kaltasinsky formation, and fractured-cavernous — in the Ashitsky member. Among the Vendian deposits, porous fine-grained sandstone and siltstone of the Kykvinsky and Vereshaginsky formations have good reservoir quality. The authors recommend a number of objects promising for hydrocarbon exploration and make a proposal on future trends of geological exploration efforts.
Viktor N. Savinov ORCiD
Director
JSC KamNIIKIGS,
15, ul. Krasnoflotskaya, Perm, 614016, Russia
e-mail: savinovvn@rusgeology.ru
Tat’yana V. Aleksandrova ORCiD
Managing director
JSC “Rosgeologia”,
43 building 3, Khersonskaya ulitsa, Moscow, 117246, Russia
e-mail: tatalex-08@mail.ru
1. Trofimuk A.A. Kuyumbo-Yurubcheno-Taiginskoe gazoneftyanoe mestorozhdenie — supergigant Krasnoyarskogo kraya: Osnovy tekhnikoehkonomicheskogo obosnovaniya razrabotki [Kuyumbo-Yurubcheno-Taiginsky elephant gas and oil field: basic principles of development feasibility study]. Novosibirsk : OIGGM; 1992. 60 p. In Russ.
2. Kharakhinov V.V., Shlenkin S.I., Zereninov V.A. et al. Petroleum potential of precambrian strata of Kuyumbinsko-Yurubcheno-Tokhomsky oil and gas accumulation area. Neftegazovaya geologiya. Teoriya i praktika. 2011;6(1): Available at: https://ngtp.ru/rub/4/12_2011.pdf (accessed 23.01.2023). In Russ.
3. Kraevskii B.G., Yashkin M.S., Nagovitsin K.E. The regional stratigraphic chart for the riphean deposits of the western Siberian platform. Geologiya i mineral’no-syr’evye resursy Sibiri. 2018;(7):4–14. In Russ.
4. Bakin V.V., Vorob’ev V.N., Evtushenko V.M. et al. Neftegazonosnost’ rifeiskikh i vendskikh osadochnykh tolshch Sibirskoi platformy [Hydrocarbon potential of Riphean and Vendian sedimentary sequences of the Siberian Platform]. Neftegazonosnost’ Sibiri i Dal’nego Vostoka. Novosibirsk : Nauka, 1981. pp. 25–42. In Russ.
5. Sitchikhin O.V. Structure and oil-and-gas content of the riphean rocks of the north-east part of Volga-and-Ural sedimentary basin (Perm kray). Neftegazovoe delo. 2009;(1): Available at: http://ogbus.ru/files/ogbus/authors/Sitchikhin/Sitchikhin_1.pdf (accessed on 14.02.2023). In Russ.
6. Neganov V.M. Seismogeologicheskaya interpretatsiya geofizicheskikh materialov Srednego Priural’ya i perspektivy dal’neishikh issledovanii na neft’ i gaz [Geoseismic interpretation of geophysical data from Northern Urals and further oil and gas exploration trends: monograph]. Perm’ : RIO PGU; 2010. 247 p. In Russ.
7. Gmid L.P., Levi S.Sh. Atlas karbonatnykh porod-kollektorov [Atlas of carbonate reservoir rocks]. In: Tr. VNIIGRI, Vyp. 313. Leningrad : Nedra; 1972. 176 p. In Russ.
8. Bagrintseva K.I. Treshchinovatost’ osadochnykh porod [Sedimentary rock fracturing]. Moscow : Nedra; 1982. 256 p. In Russ.
9. Kobranova V.N. Petrofizika [Petrophysics]. Moscow: Nedra, 1986. 392 p. In Russ.
10. Nikitina M.V. Evaluation of oil-and-gas potential of the riphean-vendian sediments in perm krai. Vestnik PNIPU. Geologiya. Neftegazovoe delo. 2013;(9):7–17. In Russ.
11. Savel’ev V.A., Shpilevaya I.K., Furman N.F. et al. Osobennosti geologicheskogo stroeniya vendskikh zalezhei na primere Sharkanskogo mestorozhdeniya [Geostructural features of Vendian accumulations: an example of Sharkansky field]. Neftyanoe khozyaistvo. 2004;(12):14–16. In Russ.