N.Yu. Sidorova, T.O. Balina, V.A. Savenko
Features of fault tectonics in North Serginsky zone
DOI 10.47148/0016-7894-2024-5-33-44
Key words: North Serginsky site; seismic exploration; tectonics; faults; fault types; jointing zones; oil bearing capacity.
For citation: Sidorova N.Yu, Balina T.O., Savenko V.A. Features of fault tectonics in North Serginsky zone. Geologiya nefti i gaza. 2024;(5):33–44. DOI: 10.47148/0016-7894-2024-5-33-44. In Russ.
On the basis of a comprehensive synthesis of geological and geophysical materials obtained in the North-Serginsky zone, the analysis of fault tectonics using the materials of earlier works was carried out in order to assess hydrocarbon potential. During the course of this work, faults in the Jurassic-Cretaceous and Pre-Jurassic series were re-identified using the Decision Space Geosciences software. Presence of listric faults was for the first time confirmed in this area. Based on the features of development and localization, the identified faults are classified into four groups according to their location, penetration deep into subsurface, and dying out within sedimentary formations. 3D seismic results allowed studying strike slip-like faults and their behaviour at different stratigraphic levels of sedimentary cover. The analysis conducted showed that clear fault tectonics patterns are typical of the North Serginsky zone, which is indicative of the active geodynamic settings in the periods of sedimentary deposit formation. At the same time, fault types, amplitudes and displacement directions are noticeably dissimilar in different stratigraphic intervals. Fault zones of Sub-Urals strike are clearly displayed in the study area during Triassic and Jurassic. Horizontal strike-slip faults are typical of Cretaceous; currently, they are now being mapped mainly owing to the development of new 3D seismic technologies. Fault system originated in pre-Jurassic time was subject to repeated renovation in subsequent tectonic periods and was not insignificant in the formation and preservation of hydrocarbon deposits.
Natal’ya Yu. Sidorova
Lead geologist
Branch of LLC “LUKOIL-Engineering” “KogalymNIPIneft”,
143 a, ul. Respubliki, Tyumen, 625000, Russia
e-mail: Natalya.Sidorova@lukoil.com
Tereza O. Balina
Head of Department
Branch of LLC “LUKOIL-Engineering” “KogalymNIPIneft”,
143 a, ul. Respubliki, Tyumen, 625000, Russia
e-mail: Tereza.Balina@lukoil.com
Valentina A. Savenko
Lead Engineer
Gubkin Russian State University of Oil and Gas
(National Research University),
65, kor. 1, ul. Leninskii prospekt, Moscow, 119991, Russia
e-mail: Savenkova64@yandex.ru
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