Investigation of influence of electrical field and solution of the surface-active substance (SAS) on water flood oil recovery factor

Abstract

Influence of the electrical current fields and various type solutions of the surface-active substances on an interfacial tension, adsorption, desorption and on oil recovery factor from heavily clay porous medium has been investigated in the article. Nonionic alfenol, cation-active DMABACH (Dimethyl Alkyl Benzyl Ammonium Chloride) and anion-active sulfonic acid have been used as SAS. Quartz sand and rock from surface exposure of Kirmakian Suite (KS) of Balakhany field are as an adsorbent. It was revealed that direct and alternating current at 50 and 100 V through solutions of different type of SAS doesn’t practically influence on their interfacial tension on the boundary of nonpolar hydrocarbon liquid. Direct and alternating current through the porous medium containing clays and carbonates doesn’t influence on value of dynamic adsorption of nonionic SAS but promotes a decrease of their desorption from the rocks surface. It was determined that shared use of the direct-current field and solution of nonionic surface-active substance in comparison with mineralized water doesn’t practically influence on value of the oil recovery factor due to high adsorption of its molecules on surface of the heavily clay rock of Kirmakian suite. The use of direct current at 100 V considerably allowed (up to 23 %) to increase the Kirmakian oil recovery factor by the stratal alkaline water