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Temperature influence on electrolyte effective viscosity in porous media
Drilling and development of hydrocarbon fields

Authors: Valery V. KADET (b. 1953) doctor of technical sciences, head of Dept. Petroleum and Reservoir Hydromechanics at Gubkin Russian State University of Oil & Gas. Honorary worker of oil and gas industry, Full Member of the Russian Academy of Natural Sciences. Sphere of academic interests - percolation modeling of transfer processes in porous media and deve-lopment of foundations for improved well productivity technology. Published over 150 works including 4 monographs, 14 textbooks and teaching aids. E-mail: kadetvvl@gubkin.ru
Andrey S. KORYUZLOV (b. 1981) post graduate student of the Dept. Petroleum and Reservoir Hydromechanics at Gubkin Russian State Univesity of Oil & Gas., sphere of academic interests - percolation modeling of fluid flow in porous media, 8 publications.

Abstract: The percolation model for electrokinetic flow of electrolyte in porous media is presented. Within the bounds of this model taking into account ionic the solution concentration, zeta-potential, porometric curve and surface properties of porous media the influence of temperature on effective wiscosity was investigated. It is determined that in the presence of sufficient amount of capillaries with radius comparable with the thickness of EDL, the rate of filtration greatly decreases as against the velocity of filtration without influence of EDL, that is interpreted as electro-viscous effect in porous media. The influence of temperature on effective viscosity depends on porometric curve shape: effective viscosity for fine-pore media is more sensitive to temperature change. The dependence of effective viscosity obtained within differs from classic Andrade law.

Index UDK: 532.546

Keywords: porous medium, electrolyte flow in porous medium, percolation theory, double electrical layer, electrical viscosity effect