METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2014 - IPC E21B43/20 C09K8/508 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and may be used in developing inhomogeneous water-flooded oil pool. During development of oil deposit oil is extracted through producers, pumping through injectors of a working agent and polymer disperse system. The deposit properties are analyzed and the pool with productive strata porosity of 5% is identified. Density of mineralized water, changed upon injection of the working agent, is identified in the near-wellbore area. At density of mineralized water up to 1020 kg/m³ systems having the relative sedimentative stability less than 0.9 and reducing hydraulic conductivity of the pool washed channels within limits from 5 up to 100% are selected as polymer disperse systems. When density of mineralized water from 1020 up to 1100 kg/m³ concentration of polymer is increased at least per 30%; when density of mineralized water is more than 1100 kg/m³ concentration of polymer is increased at least per 60% of the concentration of polymer identified at water density up to 1020 kg/m³. In composition of the polymer disperse system a disperse phase with size of particles less than 90% of the pore size or fractures in the productive formation.

EFFECT: higher oil recovery of the deposit.

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