STRIKE-SLIP FAULTS IN THE WEST SIBERIAN BASIN: IMPLICATIONS FOR PETROLEUM EXPLORATION AND DEVELOPMENT
G.N. Gogonenkov and A.I. Timurziev
Central Geophysical Surveys OJSC, 38 ul. Narodnogo opolcheniya, Moscow, 123298, Russia
Keywords: 3D reflection profiling, tectonics, strike-slip faults, en echelon fracture array, West Siberia
Pages: 304-316
Abstract
Specific deformation patterns in sediments associated with small-amplitude strike-slip faults in the basement have been recognized over a large territory of the West Siberian basin due to 3D seismic exploration advance. These patterns represent shear structures which turn to be a phenomenon beyond the classical views of the regional basin architecture. Many densely faulted oil and gas fields of a complex geometry in reservoir rocks of a wide stratigraphic range fall in zones of shear structures. Prospecting, test drilling, and oil enhancement activities in these fields are risky without a solid mechanic and kinematic background based on simulation of sedimentary fracture patterns which are associated with basement-involved strike-slip faults and may govern hydrocarbon migration as structure controls, fluid channels, or screens.
|
