INTEGRATED ELECTROMAGNETIC AND GEOCHEMICAL SURVEYS FOR PETROLEUM EXPLORATION IN WEST SIBERIA
M.I. Epov1,2, E.Yu. Antonov1, N.N. Nevedrova1,2, V.V. Olenchenko1,2, E.V. Pospeeva1, D.V. Napreev3, A.M. Sanchaa1, V.V. Potapov1,2, A.E. Plotnikov3
1A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2Novosibirsk State University, ul. Pirogova 3, Novosibirsk, 630090, Russia
3Looch, Research & Development Company for Geophysical Instruments, ul. Vtoraya Yurginskaya 34, Novosibirsk, 630051, Russia
Keywords: Transient electromagnetic (TEM) sounding, magnetotelluric (MT) sounding, induced polarization (IP), geochemical survey, joint data processing and interpretation
Abstract
Electromagnetic soundings with controlled and natural sources (TEM and MT, respectively) integrated with IP and geochemical surveys have been tested for petroleum exploration in West Siberia. The TEM method, with loop sizes smaller than the depth to the target, provide high resolution, sufficient penetration depth, and data locality. The MT method sounds deeper earth and can place constraints on the Paleozoic basement structure and its electrical properties. The petroleum implications of IP and geochemical data are associated with secondary alteration (mineralization) of rocks over oil traps.
DOI: http://dx.doi.org/10.1016/j.rgg.2014.05.019
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