GEOLOGICAL AND HISTORICO-GENETICAL ASPECTS OF SOUTH SIBERIAN PLATFORM OIL AND GAS POTENTIAL

Purpose. The purpose of the work is to analyze the oil and gas content of the Siberian platform based on the study of global historical-genetic and geological aspects of hydrocarbon ontogenesis. Methods. The methods used include interpretation of geodynamic, structural-tectonic and lithofacial factors of the oil and gas potential of the Siberian platform through studying the features of hydrocarbon deposits on its territory. The following most important global conditions for oil and gas potential of the south of the Siberian platform are analyzed: 1) huge areas of Riphean-Vendian-Cambrian sediment distribution in the vast Riphean sedimentary basins of the Siberian platform; 2) lithofacial composition of rocks, availability of thick layers of rock salt, presence of numerous archaeocyathid algae bioherms in the Riphean-Vendian-Cambrian deposits as a convincing proof of favorable paleogeographic and paleoclimatic conditions of these periods, which were determined by the position of the earth in the zone of low latitudes; 3) duration of the Riphean stage of Siberian platform development (more than 1 billion years) characterized by the formation of types of structural zones and numerous rifts different in kinematics and scales; 4) presence of incratonal and pericratonal rifts as the most permeable lithospheric structures on the territory of the Siberian Platform. They create optimal conditions for the transit of deep fluid flows, which are critical for naftidogenesis processes; 5) availability of different age genetic types of natural reservoirs with a set of lithogeodynamic complexes formed at different geotectonic stages of rock-sedimentary basin development. Results. Having summarized the geological and geophysical information of the recent years, the author analyzes global geological and historical-genetic backgrounds of the petroleum potential of the Siberian Platform that create the most favorable conditions for hydrocarbon ontogenesis. Conclusions. The listed backgrounds are confirmed by the proven and promising oil and gas potential of the Riphean - Vendian - Cambrian sediments of the south of the Siberian Platform, to which numerous hydrocarbon deposits are confined.

Siberian platform, hydrocarbon deposits, oil and gas content, rock-sedimentary basins, rift structures, pericratonic and incratonic rifts, paleo-centers of hydrocarbon generation, natural reservoirs, petroleum and lithogeodynamic complexes

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