METHOD FOR WATER AND GAS IMPACT ON FORMATION AND INCREASING RATES OF OIL WELLS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used to implement the water-gas impact in enhanced oil recovery. Method for water-gas treatment of formation includes water injection, pumping out associated petroleum gas from the annulus of oil wells by an ejector and reducing the pressure in the annulus, creating dispersion and increasing the pressure of the water-gas mixture, followed by pumping it into the formation with a booster pump. The flow rates of the mixture entering the injection wells are measured by diaphragms with differential pressure gauges, and the flow rates are regulated by valves. The device for water-gas stimulation of the reservoir contains an ejector, a booster pump, a chemical dosing unit, as well as a water injection line, a gas pumping line from the annulus of oil wells and a water-gas mixture injection line into the reservoir. Diaphragms with differential pressure gauges for measuring mixture flow rates and adjustable valves are installed on the pipelines for pumping the mixture into injection wells.

EFFECT: enhanced oil recovery.

7 cl, 1 dwg