METHOD FOR DEVELOPING OIL-GAS FIELD USING WATER-GAS IMPACT Russian patent published in 2013 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: method consists in oil production through production wells and simultaneous pumping of low-dispersed mixture of water and hydrocarbon gas with gas bubbles' sizes less than the size of pore channels through injection wells. Note that gas saturation is controlled and chemical reagents or their compositions are added into water up to the level ensuring mixture stability and its equation with oil viscosity. In zones with vertical fracturing gas saturation is adjusted simultaneously with increase of mixture pressure higher than the opening pressure of bed vertical fractures. According to the invention in zones with vertical fracturing there performed is a local pumping of water-gas mixture up to complete isolation of fractures. In the course of water-gas mixture pumping into the bed there revealed are the zones with the least values of gas-oil ratios, pumping front is moved into these zones and pumping is continued up to recovery of gas-oil ratios at previous level. Note that volumetric gas saturation of mixture and degree of gas dispersion in injection well is adjusted by calculation formulae.

EFFECT: increasing the efficiency of the method.

4 cl, 1 ex