SYSTEM FOR WATER-AND-GAS RESERVOIR TREATMENT Russian patent published in 2008 - IPC E21B43/20 

FIELD: oil industry, particularly enhanced recovery methods for obtaining hydrocarbons, namely water-and-gas reservoir treatment along with simultaneous associated gas utilization.

SUBSTANCE: system comprises power plant, multistage vane-type booster pump, vessel with foam-generation surfactant, metering pump, as well as water supply line, gas supply line, surfactant supply line and line to inject water-gas mixture into injection well. Gas supply line has gas pump. Booster pump has dynamic water-gas mixture dispenser installed at inlet thereof. Water and gas mixing means for prior mixture composition preparation is arranged upstream of the dispenser. The first bypass line is installed between dynamic dispenser inlet and booster pressure outlet. System has the second bypass line, which connects water supply line with the first bypass line, as well as the third bypass line, which communicates gas supply line with the first bypass line. The first, the second and the third bypass lines have valves.

EFFECT: increased efficiency of system operation due to intensive gas-liquid mixture dispersion and decreased negative gas influence on booster pump characteristic, as well as extended operational range due to provision of non-stationary regimes of water-and-gas mixture injection in reservoir.

8 cl, 3 dwg