Stratification of reflecting horizons, seismogeological sedimentary megacomplexes of the northern and arctic regions of the West Siberian oil and gas province

The article is devoted to the construction of coordinated seismogeological models of the platform deposits

geological structure in the northern and Arctic regions of the West Siberian oil and gas province, which administratively cover the northern regions of the Yamal–Nenets Autonomous District, the northwest of the Krasnoyarsk Region and the shelf of the southern part of the Kara Sea. The characteristics of the reference seismic horizons that control the Mesozoic–Cenozoic seismogeological megacomplexes, corresponding in volume to the main oil-bearing megacomplexes, are presented. The Cretaceous reference horizons M, M₁ and G, identified on seismic sections and confined to the tops of the Neocomian, Aptian and Cenomanian, and the horizon B, formed on the top of the Jurassic, are reliably stratified using the seismic logging (SL) – Vertical Seismic Profiling (VSP) data. In the work, using data from the ultra-deep wells SG-6, SG-7, the identification of reflecting horizons formed at the geological boundaries of the Jurassic–Triassic, Triassic–Paleozoic is substantiated, regional seismogeological models of the Triassic and Jurassic megacomplexes, as well as Upper Proterozoic–Paleozoic deposits of the Yenisei–Khatanga regional trough are proposed.

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