Carbonaceous deposits (Сarboniferous) and oil and gas potential prospects of the Magnitogorsk trough (South Urals, Russia)

A.M. Tyurin ^a,b*, A.V. Kolomoets ^a,b**, A.V. Snachev ^c***, I.V. Smoleva ^d****, P.V. Pankrat’ev ^b*****

^aVolga-Urals Research and Design Institute for Oil and Gas, Orenburg, 460000 Russia

^bOrenburg State University, Orenburg, 460018 Russia

^cInstitute of Geology, Ufa Federal Research Center, Russian Academy of Sciences, Ufa, 450077 Russia

^dInstitute of Geology named after Academician N.P. Yushkin, Komi Science Center, Ural Branch, Russian Academy of Sciences, Syktyvkar, 167982 Russia

E-mail: ^*amturin1952@bk.ru, ^**kolomoyets56@mail.ru, ^***SAVant@rambler.ru, ^****smolewa@geo.komisc.ru, ^*****pankratev34@mail.ru

Received July 6, 2021

ORIGINAL ARTICLE

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DOI: 10.26907/2542-064X.2021.3.466-476

For citation: Tyurin A.M., Kolomoets A.V., Snachev A.V., Smoleva I.V., Pankrat’ev P.V. Carbonaceous deposits (carboniferous) and oil and gas potential prospects of the Magnitogorsk trough (South Urals). Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2021, vol. 163, no. 3, pp. 466–476. doi: 10.26907/2542-064X.2021.3.466-476.

Abstract

The oil and gas potential prospects of the Magnitogorsk trough in the South Urals were studied and substantiated using the data of the geological survey and deep-well drilling. Based on the results of the seismic, gravity, and magnetic explorations, a large unit was detected in the Lower-Middle Carboniferous carbonates of the Kizil zone. The oil and gas blowouts were registered in the drill holes. To further explore the oil and gas potential of the region, the features of black shales were analyzed. It was shown that the Kumak ore field shales are promising sources of oil, depression analogues of the Lower-Middle Carboniferous shelf carbonates. Therefore, we recommend that the black shales of the South Urals should be further studied for their oil and gas potential. The major tasks for future research are as follows: localization of facies of the carbonate sedimentation basin within the Magnitogorsk trough and the East Urals uplift, as well as development of its geological and geophysical model; assessment of the oil and gas potential prospects of the region with the help of the developed model; substantiation of regional CMP seismic surveys.

Keywords: carbonaceous shales, organic carbon, carbon isotope composition, sedimentation basin, oil and gas potential, South Urals, Magnitogorsk trough, East Urals uplift

Acknowledgments. The study was funded by the Orenburgneft Company grant (2020–2021) and performed as part of the state assignment (Institute of Geology, UFRC RAS, Ufa, project no. 0246-2019-0078).

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