METHOD OF SIMULATION OF OIL FORMATION BOTTOM-HOLE ZONE OR OIL FORMATION Russian patent published in 2015 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to oil producing industry and specifically for methods of simulation of oil formation bottom-hole zone or oil formation. The method includes sequential injection of hydrocarbon solution of surfactant and water. Before water injection disperse additive in quantity of 10.5-60 wt % is introduced into hydrocarbon solution of surfactant. Injection of hydrocarbon solution of surfactant with disperse additive and water is carried out cyclically with number of cycles equal to 2-10. Thereafter the process is withheld during 24.5-48 hours and the well is placed into operation. Hydrocarbon solution consisting of mixture of non-ionic surfactants or mixture of non-ionic and anionic surfactants of oil- or synthetic sulphonate-type is used as the hydrocarbon solution of surfactant. Disperse additive containing silicone-containing substance or disperse additive of carbonates of barite type, or carbon, or sulphur, or their mixture is used as the disperse additive.

EFFECT: improved quality in isolation of watered oil wells due to bigger speed and stability of generated emulsions, their increased viscosity and durability in conditions of high temperature.

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