Open AccessTo estimation of polarization characteristics of the medium on the data of multi-frequency measurements in the method alternating current resistance
Author(s) -
Aleksey Fedorovich Shestakov
Publication year - 2021
Publication title -
izvestiâ uralʹskogo gosudarstvennogo gornogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2500-2414
pISSN - 2307-2091
DOI - 10.21440/2307-2091-2021-1-102-108
Subject(s) - polarization (electrochemistry) , polarizability , induced polarization , frequency domain , time domain , materials science , computational physics , mineralogy , chemistry , physics , electrical resistivity and conductivity , computer science , mathematics , mathematical analysis , organic chemistry , quantum mechanics , molecule , computer vision
The relevance of the work is due to the need to extract additional information in the study of the polarization properties of the geological environment from experimental data in the method of ac resistance using multifrequency measurements. The introduction provides a brief review of the literature on the problem of studying the polarization properties of rocks in the frequency domain and the method of frequency dispersion, which is successfully used in prospecting and exploration works in sulfide and copper pyrite deposits. The questions of determining the polarizability of the medium in the frequency domain and the parameter of the polarization process depending on the structural and petrophysical characteristics are discussed. Purpose of this research is to compare the characteristic features of studying the polarization properties of a medium in the frequency domain and to establish the relationship between polarizability and the frequency dispersion coefficient of electrical resistance. To propose an algorithm for determining the polarization characteristics of a medium from the data of multifrequency measurements in the method of resistances on alternating current. Research methodology: substantiation of the choice of the model of induced electric polarization in the frequency domain and the peculiarities of its application to establish the relationship between the frequency dispersion coefficient and the apparent polarizability of the medium. Research methods: theoretical calculations and comparative analysis of the obtained dependences on the model parameters. Results of work. The choice of the model of induced electric polarization Cole-Cole in the frequency domain is substantiated to establish a relationship between the frequency dispersion coefficient and the apparent polarizability of the medium. The possibility of using multifrequency measurements of electrical resistance to study the polarization characteristics of a medium based on this model is shown. An algorithm has been developed and expressions have been obtained that make it possible to determine the polarizability of the medium and the parameter of the relaxation time from the data of measuring the apparent resistance at three frequencies in the method of electric sounding on alternating current. Application area. The obtained results can find application in the processing of data from conductive electrical soundings on alternating current, for the correct interpretation of the frequency effect and the study of the polarization properties of the medium, in particular, when research by the method of frequency dispersion.