In the Early Triassic, the Siberian territory underwent intense continental rifting, which resulted in submergence of the Earth’s surface and formation of the West Siberian rifting sedimentary basin in the Mesozoic and Cenozoic. Tectonic events that lasted throughout these eras led to the formation of three structural stages in the sedimentary cover. The Triassic rift structures and fold-block structures of Baikalides, Salairides, Caledonides, and Hercynides making up the basement determined the morphology of structures in the Meso-Cenozoic cover, especially of the lower-plate deposits of Middle Triassic through Bathonian age. More than 200 hydrocarbon pools have been discovered in the Lower-Middle Jurassic deposits. Oil pools occur in the central part of the province, whereas gas and gas-condensate ones, in the northern and arctic regions of the plate. The pools become complicated down the section, from simple anticlinal to nonstructural, with lithologic screens. The development of marine, littoral, and continental sediments, favorable geochemistry of dispersed organic matter, and its catagenesis are responsible for the high hydrocarbon potential of the Lower-Middle Jurassic deposits of the West Siberian petroliferous province.

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