Filtration studies of a chemical composition for increasing oil recovery and intensifying the development of terrigenous reservoirs
V. V. KOZLOV, L. K. ALTUNINA, M. R. SHOLIDODOV
Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: oil-displacing composition, enhanced oil recovery, terrigenous reservoir, heavy high-viscosity oil, intensification of development, filtration characteristics, oil displacement coefficient
Abstract
The results of laboratory studies on the effectiveness of GBK-F acid composition for enhancing oil recovery from terrigenous reservoirs are presented. Experiments on reservoir models with oil of various viscosities (Vostochno-Messoyakhskoye and Olenye fields) confirmed the ability of the composition to increase the displacement coefficient by 20-26 % at both low (22-23 °C) and high (90 °C) temperatures. It has been determined that the use of the composition significantly equalises filtration flows in heterogeneous systems. It has been shown experimentally that the composition effectively eliminates water blocking in low-permeability intervals, increasing the phase permeability for oil from 0.013 to 0.357 mm2. It has been concluded that the mechanism of action of GBK-F is based on a complex chemical and rheological effect that improves the filtration characteristics of the reservoir. The obtained results allow us to recommend the use of GBK-F to intensity production and increase the coverage of heterogeneous terrigenous reservoirs.
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