METHOD FOR DEVELOPING CARBONATE RESERVOIR IN OIL FIELD Russian patent published in 2024 - IPC E21B43/22 C09K8/588 

FIELD: oil production.

SUBSTANCE: invention relates to a method for developing a carbonate reservoir in an oil field. The method involves pumping carbonated water into production wells. The thickness of the reservoir is preliminarily determined. The water cut of production wells is also determined. Also the kinematic viscosity of oil and reservoir pressure - Р_res is determined. Reactive production wells are identified. A reservoir section with a perforated formation thickness of at least 2 m and a kinematic viscosity of oil of 1800-2000 cSt, with an injection well and reacting production wells with a water cut of no more than 70% is selected. The number of reacting production wells is at least four with a distance between injection and production wells of 350-400 m. Liquefied propane is injected into reacting production wells. A technological holding period is carried out for 2-3 hours. The injection well is started. Carbonated water is pumped into the injection well. The daily volume of injection into the injection well is 70-80 m³/day, the pressure is taken equal to 1.4⋅R_res. Injection is carried out within 180 days. The injection well is stopped for 95 days, after which the operations are repeated, starting with the injection of liquefied propane into the reacting production wells.

EFFECT: increase in the production of oil deposits in carbonate reservoirs.

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