The problem of combined thermal and acid treatment in a multilayer crude-oil reservoir is examined for two-phase flows of fluid (water and crude oil) in a porous medium. A model in the form of a “bundle” of cylindrical capillaries of different radii is used to describe changes in the porosity and permeability of the porous medium as a result of chemical reaction between the acid and rock matrix, and the coalescence rate of the channels due to dissolution of pore walls is calculated based on the Smoluchowski equation. The recovery of crude oil in conventional flooding is compared with flooding with injection of a heat-transfer agent, and flooding using acid and the combination technology. It is shown that thermal treatment combined with acid treatment of a multilayer crude-oil formation provides the most effective oil production conditions.
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The study was performed through the facilities of a subsidiary separate from the Kazan’ Federal University for fulfillment of a government assignment within the sphere of scientific activity.
It was conducted through facilities of a subsidiary independent of the framework of government support of the Kazan’ Federal University for purposes of improving its competitiveness among the world’s leading scientific and educational centers, and also by Grant No. “14-01-31096 mol_a” from the Russian Fund for Fundamental Research.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 63 – 66, November – December, 2014.
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Zakirov, T.R., Nikiforov, A.I. & Latypov, A.I. Modeling Thermal Treatment in Combination with Acid Treatment of a Multilayer Oil Reservoir. Chem Technol Fuels Oils 50, 547–554 (2015). https://doi.org/10.1007/s10553-015-0562-4
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DOI: https://doi.org/10.1007/s10553-015-0562-4