Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Russian Geology and Geophysics

2004 year, number 1

LOWER-MIDDLE JURASSIC COMPLEX OF THE WEST SIBERIAN PLATE: STRUCTURE AND PETROLEUM POTENTIAL

V.S. Surkov, L.V. Smirnov, F.G. Gurari, V.P. Devyatov, and A.E. Ekhanin
Siberian Research Institute of Geology, Geophysics and Mineral Resources, 67 Krasny prosp., Novosibirsk, 630091, Russia
Keywords: West Siberian sedimentary basin, Lower-Middle Jurassic, Early Triassic rifting, structural basin
Pages: 50-52

Abstract

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.