METHOD OF THE RESERVOIR EXPLOITATION Russian patent published in 2012 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention belongs to the oil reservoir exploitation with the use of oil displacement techniques with the help of water, gas and hydrocarbon solvents, which may be used in oil producing industry. Essence of the invention: the technique involves a synchronously separate water injection and displacement agent, which comprises gas, to the water-alternated-gas injection wellhead into diverse formation intervals and hydrocarbon take out of exploitation well. At that the injection wellhead is uncapped along the whole formation thickness, while the exploitation well is uncapped or bored in the horizontal direction in such a way, so that the level of its elevation of the upper perforation was lower than the upper perforation mark of the injection well to ensure an angle 1-4º between their upper perforation interval marks. Upper and lower formation intervals of the injection well are separated by a packer with the ratio from 1:4 to 1:1. Herewith a displacement agent in a form of water -gas mixture with the gas content of 50-70% under the pressure equal to the water injection pressure is pumped into the lower interval in order to obtain a gas bearing capacity of the total injected volume not exceeding 40% 3 yl.

EFFECT: increase in oil displacement uniformity under the influence of water-alternated-gas injection at the production field, characterized by flat dip and not complicated by compartmentalization owing to a limited discharge gas flow along the roof part of the formation.

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