Geoinformatika 2010; 1 : 22-32
ABOUT POSSIBILITY OF HYDROCARBON ACCUMULATIONS MAPPING IN CRYSTALLINE ROCKS BY GEOELECTRIC METHODS
Levashov S.P., Yakymchuk N.A., Korchagin I.N., Razin D.V., Juzlenko A.T.
The practical experience of experimental application in 2009 of untraditional geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS) (FSPEF–VERS express-technology) on the local area of Novokonstsantinovskaya fracture zones within Ukrainian crystalline shield are given. The three anomalous geoelectric zones of 3.2 km2 area of gas (gas-condensate) type were revealed and mapped on investigation area by FSPEF method survey. The bedding depths of the anomalous polarized layers (APL) of gas and gas-condensate type were determined by VERS sounding. The anomalous zones are fixed along the general tectonic fractures. The revealed APL of gas and gas-condensate type in vertical cross-section are parallel to the tectonic fractures. The optimal places for the degassing borehole locations were delineated according to the measurement data by the FSPEF–VERS methods. The local anomalous zone of “uranium mineralization area” type was revealed and mapped by FSPEF method survey with the special antenna using. The experiment results testify of practical possibility of the FSPEF–VERS technology using for the hydrocarbon accumulations exploration and prospecting in tectonically fractured zones of crystalline basement, as well as they are one more solid argument for the practicability of more broad using of FSPEF–VERS methods in geological prospecting process for oil and gas.
Keywords: geoelectric survey, electric-resonance sounding, deposit type anomaly, gas, gas-condensate, uranium mineralization, hydrocarbon accumulation, fracture zone, crystalline massif, basement.
