DIELECTRIC RELAXATION IN OIL-BEARING CLAYEY ROCKS
M.I. Epova, P.P. Bobrovb, V.L. Mironovc,d, and A.V. Repinb
aA.A. Trofimuk Institute of Petroleum Geophysics and Geology, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
bOmsk State Pedagogic University, nab. Tukhachevskogo 14, Omsk, 644099, Russia
cKirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russia
dReshetnev Siberian State Aerospace University, pr. Krasnoyarskii Rabochii 31, Krasnoyarsk, 660014, Russia
Keywords: Oil-bearing deposits, clayey rocks, dielectric permittivity, multifrequency relaxation
Pages: 1028-1034
Subsection: GEOPHYSICS
Abstract
The dielectric properties of the bentonite-oil-salt solution mixtures with different water and oil saturation were experimentally studied in the frequency range of 10 kHz to 4 GHz at 25-60?C. It has been established that besides the region of the Debye water relaxation, there are two more relaxation regions resulting from the interfacial interaction of the mixture components in this frequency range. To describe the dielectric permittivity and equivalent conductivity of the mixture, a spectroscopic model taking into account the multifrequency relaxation is proposed. The dependence of the model parameters on the water saturation and temperatures of the samples has been determined. The experimental data are compared with the modeling results, and the error of prediction for the dielectric permittivity and conductivity of mixture is estimated using the proposed model.
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