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ALLUVIAL PALEOSYSTEMS OF THE MALYSHEVSKY HORIZON OF THE SOUTHERN AREAS OF THE WEST-SIBERIAN SEDIMENTARY BASIN – A DETERMINING FACTOR FOR THE DISTRIBUTION OF OIL RESERVOIRS OF THE SHOE-STRING TYPE

V. A. Kazanenkov

A.A.Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia

A brief review of the history of studying oil and gas potential of alluvial paleosystems in sediments of different ages in the world, Russia and Jurassic deposits in West Siberia, in particular, is given. Based on the analysis of paleogeographic reconstructions performed in the early 2000s and the results of oil and gas exploration in the Uvat District of the south of the Tyumen Region obtained in the 21st century, we show the confinement of the identified oil deposits in the Yu2–Yu4 beds of the Verkhnetyumenskaya Subformation to the channel paleosystems of the Malyshevian Era. Prospects have been outlined to search for new hydrocarbon accumulations in the deposits of the continental genesis of the Late Bajocian – Bathonian age in the southern regions of the West Siberian petroleum province.

Keywords: West Siberia, Uvat District, Malyshevsky Horizon, Tyumenskaya Formation, beds Yu2–Yu4, paleogeography, hydrocarbon deposits.

DOI 10.20403/2078-0575-2019-4-59-66