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ON THE RELEVANCE OF SEARCHING FOR NEW OIL POOLS IN TRIASSIC AND PALEOZOIC UNITS OF WEST SIBERIA

V. S. Bochkarev, I. V. Kasyanov

NAO SibNATs, Tyumen, Russia

It is shown over deep horizons that Jurassic deposits are characterized by a significant overestimation of hydrocarbon resources, and the primary goal of strategic addition to reserves will not be achieved. New targets identified by seismic survey in Triassic and Paleozoic are mainly localized by the Gyda Peninsula, Gulf of Ob and individual areas of the Kara Sea, Sibiryakov and Uyedineniya Islands included. The subsoil wealth is concentrated in specific areas and regions, and not generally in West Siberia. New data on deep wells made it possible to update the stratigraphic chart of the Permian and Triassic formations. Seismoacoustic data on deep wells and biostratigraphy of the Gydanskaya parametric well 130 clearly indicate that the thickness of the entire Mesozoic-Cenozoic cover does not exceed 7,000 m, although in previous publications this thickness was estimated at 10,000–11,000 m.

Keywords: West Siberia, strategy of addition to oil reserves, Jurassic complex, Triassic, Paleozoic, geotectonics.

DOI 10.20403/2078-0575-2019-4-28-36