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REGULARITIES OF THE LOCATION OF HYDROCARBON ACCUMULATIONS IN BEDS OF THE MALYSHEV HORIZON (MIDDLE JURASSIC, WESTERN SIBERIA)

V. A. Kazanenkov

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

The paper considers regional regularities of the hydrocarbon accumulations location in the upper part of the Middle Jurassic petroleum play throughout the territory of the West Siberian Petroleum Province. The structural and facies control for distribution of accumulations, their allocation by types of traps, confinedness to certain intervals of the Bathonian reservoir section in various regions of the province, changes in the phase state of hydrocarbons and pressure-and-temperature conditions, as well as physico-chemical properties of fluids have been established on the basis of the latest results of regional studies. The revealed features of the hydrocarbon accumulations location make it possible to fulfill a reasonable forecast of new accumulations of hydrocarbons in the productive horizons of J4, J3 and J2 within promising zones of oil and gas accumulation. When replacing the resource base, it is of great importance for the rational choice of a complex of geological and geophysical methods for prospecting and exploration of new accumulations.

Keywords: Western Siberia, Middle Jurassic, Malyshev Formation, Tyumen Formation, Bathonian reservoir, J2–J4 beds, hydrocarbon accumulation.

DOI 10.20403/2078-0575-2022-11с-56-63

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