METHOD AND SYSTEM FOR PRODUCED OIL GAS AND RESERVOIR WATER RECOVERY Russian patent published in 2008 - IPC E21B43/16 

FIELD: oil production, particularly oil, gas and gas condensate well construction, enhanced recovery methods for obtaining hydrocarbons.

SUBSTANCE: method involves directing well product to separator; dividing well product into oil with low water content including residual gas, water and gas flows; moving water mixed with gas to inlet of at least one compressor-pump; injecting water-gas mixture in injection well or wells. Before water-gas mixture injection in injection well or wells at compressor-pump outlet water-gas mixture is dispersed to obtain fine water-gas mixture including gas in amount of 10-30% by volume and having pressure of at least 15 MPa. System comprises at least one production well connected to separator. Separator outlet for oil including residual water and gas discharge is connected to the first compressor-pump. At least one separator outlet adapted to water and gas discharge are connected to the second compressor-pump having outlet linked to dispersion means, which in turn is connected to injection well or water-distribution comb structure of injection wells.

EFFECT: provision of produced oil gas and reservoir water recovery, increased oil reservoir coverage, elimination of pipeline, water line construction in reservoir pressure maintenance system, decreased oil-collecting network corrosion, decreased repair costs and prevention of gas flare discharge into atmosphere.

12 cl, 2 dwg