METHOD FOR RESERVE DEVELOPMENT Russian patent published in 2012 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: the method relates to oil reserve development using methods of displacing oil from the formation by water, gases and hydrocarbon solvents. The method involves a simultaneous independent injection of water and gas-containing displacement agent through the water-gas injection well into various formation sections and extraction of hydrocarbon products from the output well. It is carried out in sections of the formation where the formation top between the output well and injection well descends with a 1-4° angle, upper and lower formation intervals in the injection well are divided by a packer with the ratio ranging from 1:4 to 1:1. Furthermore, the displacement agent is injected into the lower interval in the form of gas-water mixture with the gas concentration of 50-70% with the pressure equal to the water injection pressure, to achieve the gas concentration equal up to 40% of the whole injected mass.

EFFECT: increased displacement coefficient of the formation by limiting the movement of the displacement agent in the formation top.

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