THE DISTINQUISHING FEATURES OF THE FAULTS IN THE PLATFORM COVER: RESULTS OF THE APPLICATION OF TECTONOPHYSICAL APPROACH TO THE STUDY OF THE TAMBEY HYDROCARBON DEPOSIT (YAMAL PENINSULAR)

• Main Authors: K. Zh. Seminsky, Yu. P. Burzunova, A. I. Miroshnichenko, S. A. Bornyakov, A. A. Nezhdanov, A. V. Ershov, A. S. Smirnov, I. V. Buddo, A. K. Seminsky, A. S. Cheremnykh, I. V. Kachinskas, К. Ж. Семинский, Ю. П. Бурзунова, А. И. Мирошниченко, С. А. Борняков, А. А. Нежданов, А. В. Ершов, А. С. Смирнов, И. В. Буддо, А. К. Семинский, А. С. Черемных, И. В. Качинскас
• Other Authors: Experimental studies on regularities of manifestation of faults in an inhomogeneous environment correspond to the government contract theme "Recent geodynamics, mechanisms for destruction of the lithosphere, and geological hazards in Central Asia" (FWEF-2021-0009). The research activities involved work equipment of CCU "Geodynamics and Geochronology" at the Institute of the Earth’s Crust SB RAS under the grant 075-15-2021-682, Экспериментальные исследования, касающиеся общих закономерностей проявления разломов в неоднородной среде, соответствуют тематике государственного задания «Современная геодинамика, механизмы деструкции литосферы и опасные геологические процессы в Центральной Азии» (№ FWEF-2021-0009). В работе задействовалось оборудование ЦКП «Геодинамика и геохронология» Института земной коры СО РАН в рамках гранта № 075-15-2021-682
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch 2021
• Subjects: физическое моделирование; hydrocarbon deposit; fault zone; block; state of stress; sedimentary cover; 3D seismic survey; physical modeling; месторождение углеводородов; разломная зона; блок; напряженное состояние; осадочный чехол; 3D сейсморазведка; Ямал; Siberia
• Online Access: https://www.gt-crust.ru/jour/article/view/1377; https://doi.org/10.5800/GT-2021-12-4-0566

The study was aimed to identify the features of the formation and regularities of manifestation of faults in the platform environment applying the tectonophysical approach to the study of the structure of the Tambey hydrocarbon deposit (northern Yamal), largest in the West Siberia. Such research is important in the oil and gas industry at the present stage of transition from the exploitation of declining unique and large deposits to exploration and exploitation of deposits of complex structure. The tectonophysical approach was applied consistently in three levels of research. Initial consideration was given to regular trends in the structure of the platform cover in the context of general tectonophysical ideas of disjunctive faults, their inner structure and formation features. Then, the identification of a network of large fault zones has been done at the regional level for the northern Yamal on the basis of the lineament analysis of the relief and optical modeling, three main stages of its formation have been reconstructed, and there have been identified the features of the state of stress, among other factors determining the Tambey deposit contours in three areas – western and northern Tambey and Tassyi. Finally, based on tectonophysical interpretation of 3D seismic attribute analysis data and elastoplastic modeling experiment results, for the northern Tambey area at the local level there were identified the faults zones, the features of their structures in rheologically stratified unit, and the paragenetic relationship with the regional-level structures. The study has shown that the structure of the sedimentary cover, whose formation is tectonically influenced by the adjacent mobile belts, is zone-block. It reflects the zone-block structure of the basement, though, in contrast, is not represented by narrow main-fault planes (1st-order faults). The blocks in the cover contact along rather wide zones, the inner structure of which corresponds to the early stages of faulting and is represented by a dense network ...