SOME TYPES OF SECTIONS OF THE UPPER JURASSIC BAZHENOV AND GEORGIEV FORMATIONS IN THE OB'-IRTYSH INTERFLUVE
V.G. Eder
Institute of Petroleum Geology and Geophysics, Siberian Branch of the RAS,
3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Upper Jurassic, Bazhenov and Georgiev Formations, types of sections
Pages: 744-751
Abstract
Sections of the Bazhenov and Georgiev Formations in the northern Ob'-Irtysh interfluve were studied. Four lithologic types of sections of the Bazhenov Formation and three types of sections of the Georgiev Formation have been recognized, and their relationship with the petroleum potential of the Jurassic-Cretaceous deposits has been established. It is shown that the settings in which sediments accumulated on positive structures at the bottom of the Georgiev paleosea were more favorable for the formation of phosphorite concretions and intense concentration of glauconite grains than the settings in syneclises. The conditions of accumulation of both formations have been refined.
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