GEOLOGY AND PETROLEUM POTENTIAL OF RIPHEAN RESERVOIRS IN THE SOUTHWESTERN SIBERIAN CRATON
V.I. Val'chak, A.A. Evgrafov, N.A. Goryunov, and A.F. Babintsev
Eniseigeofizika OJSC, ul. Leningradskaya 66, 660074, Krasnoyarsk, Russia
Keywords: Riphean sequences, reservoir, sediment thickness, deformation, structural zone, seismic exploration data, Siberian craton
Pages: 230-238
Abstract
We report CDP reflection profiling data acquired by Yeniseigeofizika OJSC in the southwestern Siberian craton. The collected reference and regional profiles of a total length of ~5000 km run in W-E and N-S directions and traverse all major structural elements of the craton. The data were processed to obtain important evidence for the sediment structure as a basis for further exploration. The synthesis of the results allowed mapping the Riphean surface, with sedimentary sequences and basement highs. The thicknesses and deformation patterns of rocks were used to distinguish ten zones, which differ in structure and composition as well as in the position with respect to major units of the overlying Vendian-Paleozoic strata. The distinguished zones have been ranked in terms of exploration and licensing priority.
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