Theoretical features of improving the oil recovery efficiency from carbonate reservoirs in the Volga-Ural province

Теоретические особенности повышения эффективности нефтеизвлечения из карбонатных коллекторов волго-уральской провинции
Chizhov A.P. Rabaev R.U. Andreev V.E. Chibisov A.V. Kuangaliev Z.A. Efimov E.R. Ivanov D.V.
2021 Oil Gas Scientific Research Project Institute

SOCAR Proceedings
2021 Issue 14 9 - 14 pp.

Currently, the share of hard-to-recover oil reserves confined to carbonate reservoirs is more than 20% of the Volga-Urals hydrocarbon reserves. The use of traditional acid stimulation in conditions of a complex structure of carbonate reservoirs and low reservoir pressure is ineffective. In order to increase the efficiency of hydrochloric acid treatment, theoretical and experimental studies have been carried out aimed at increasing the efficiency of the work being carried out to stimulate the inflow to production wells that operate carbonate reservoirs. Filtration of the acid solution into low-permeability intervals of the carbonate reservoir involves the use of reverse counter-current capillary impregnation mechanisms. Analytical research methods made it possible to determine that the activation of the impregnation processes is carried out under conditions of nonstationarity of the pressure parameters of the reservoir system. Numerical modeling of the exposure process allowed to optimize the exposure parameters.

Acid , Bottom-hole zone , Carbonate reservoir , Displacement , Efficiency , Impact , Reservoir , Well

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Ufa State Petroleum Technological University, Ufa, Russian Federation
Atyrau Oil and Gas University Named After S. Utebayev, Atyrau, Kazakhstan
«MakOil» JSC, Nurlat, Republic of Tatarstan, Russian Federation

Ufa State Petroleum Technological University
Atyrau Oil and Gas University Named After S. Utebayev
«MakOil» JSC

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