Earth`s Cryosphere, 2019, Vol. XXIII, № 3, p. 3-10
ELECTRICAL RESISTIVITY TOMOGRAPHY
FOR IDENTIFICATION OF FROZEN AND COLD SALINE ROCKS
D.A. Kvon1, I.N. Modin2, V.A. Shevnin2, D.V. Makarov2, A.D. Skobelev1,2
1Research Center Geoscan LLC, 95, Leninsky prosp., Moscow, 119313, Russia; kvonchikc@rambler.ru
2Lomonosov Moscow State University, Faculty of Geology, 1, Leninskie Gory, Moscow, 119991, Russia
Shallow subsurface in the permafrost zone around the Kharasavei gas and condensate field in the Yamal Peninsula is studied by electrical resistivity tomography (ERT) to characterize the thermal state and salinity of the ground. Resistivity patterns obtained by statistical processing of ERT data jointly with petrophysical modeling allow discriminating between deposits of different salinities and imaging the section structure. A procedure is suggested to estimate pore fluid salinity from resistivity data.
Electrical resistivity tomography, petrophysical modeling, saline permafrost, cold ground