Nonlinear electrical conductivity response of shaly san14d reservoir

Abstract

A brief review of electrical conductivity modelling of the porous medium is presented here to establish that, merely for the sake of applicability, the sound physico mathematical model of Maxwell has been replaced by Archie's empirical one. The extension of clean sand models to shaly-sand models is discussed emphasizing the inadequacy of the former to represent true physical situations. Since the experimental data show nonlinear dependence of rock conductivity on pore fluid conducti vity, three nonlinear model equations of Glover, Mixing and Bussian are studied for a wide range of para meters and the results are analysed in the light of physi cal expectations. It is concluded that only the Bussian model is able to simulate the behaviour of effective conductivity of saturated shaly-sand reservoir over the complete range of water and matrix conductivity and porosity values.