Abstract
Extensive 3D seismic exploration has revealed in much of the West Siberian petroliferous basin area a special type of faults and deformations within the sedimentary cover, caused by low-separation basement strike-slip faults. A geologic phenomenon associated with strike-slip fault structures is something new to the understanding of the subsurface structure of West Siberia. Complex morphology, intense disjunctive faulting, block arrangement and enormously wide stratigraphic range of oil and gas presence are characteristic of numerous hydrocarbon fields within the zones of strike-slip fault structures. It would certainly be a risky endeavor to design field development-andproduction projects, drill production wells and conduct geotechnical surveys without confident geomechanical and kinematic models for structure-forming, fluid-conductive and sealing dislocations caused by strike-slip faults in the basement.
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