THE BAZHENOV HORIZON OF WEST SIBERIA: STRUCTURE, CORRELATION, AND THICKNESS
S.V. Ryzhkova1,2, L.M. Burshtein1,2, S.V. Ershov1, V.A. Kazanenkov1, A.E. Kontorovich1,2, V.A. Kontorovich1,2, A.Yu. Nekhaev1, B.L. Nikitenko1,2, M.A. Fomin1,2, B.N. Shurygin1,2, A.L. Beizel’1, E.V. Borisov1, O.V. Zolotova1, L.M. Kalinina1,2, E.V. Ponomareva1
1A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
Keywords: Баженовский горизонт, баженовская свита, корреляция скважин, маргинальный фильтр, Западная Сибирь, Bazhenov Horizon, Bazhenov Formation, well-to-well correlation, marginal filter, West Siberia
Abstract
The type sections of the Bazhenov Horizon and formations recognized within this horizon have been identified based on a comprehensive analysis of paleontological, lithological, geophysical (well-log and CDP seismic data), and geochemical data on the West Siberian Basin. The Bazhenov Horizon was traced throughout the entire West Siberian sedimentary basin. The criteria for the recognition of the top and base of this horizon within the stratigraphic equivalents of the Bazhenov Formation were suggested. The proposed facies-stratigraphic zonation of the Bazhenov Horizon reflects the spatial location of all formations identified within this horizon. As seen on the newly proposed thickness map, the Bazhenov Horizon reaches a thickness of 15-25 m within the Bazhenov and Tutleim Formations, 30-35 m within the Mulym’ya Formation, 30-45 m within the Danilov Formation, 40-65 m within the Mar’yanovka Formation, up to 100 m within the Golchikha Formation, >350 m within the Yanov Stan Formation, up to 35 m within the Bagan Formation, and 35-40 m within the Maksimkin Yar Formation. A marginal filter (according to A.P. Lisitzin) has been identified along the East Siberian land.
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