Influence of Injection of Thermogel on Oil Displacement by Waterflooding
N. K. KORSAKOVA1, V. I. PEN’KOVSKY1, L. K. ALTUNINA2, V. A. KUVSHINOV2
1Lavrentiev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentieva 15, Novosibirsk, 630090 Russia
2Institute of Chemistry of Oil, Siberian Branch, Russian Academy of Sciences, Akademicheskii pr. 4, Tomsk, 634021 Russia
Keywords: увеличение нефтеотдачи, вязкая нефть, капиллярное запирание, гели, заводнение пласта, enhanced oil recovery, viscous oil, capillary attraction shutting-off, gels, waterflooding
Abstract
The article describes physical simulation and mathematical modeling of influence exerted by injection of thermogel on configuration of water flow in water flood recovery. Recovery of oil, especially viscous oil, with such method features unstable displacement front and formation of water fingers that eventually turn into a net of water channels directed toward the lowest flow coefficient between wells. Most of oil remains immobile and is in dynamic equilibrium with the displacement water flow. The authors show that injection of thermogel in a reservoir between wells expands displacement front at the late stage of mining, which allows enhancement of oil recovery factor.
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