METHOD FOR ISOLATION OF BRINE WATER INFLOW Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: method can be used for isolation of flooded beds in producing wells. According to method, packer is installed above water-appearing part of bed. Hydrocarbon liquid is injected into productive part of bed through annular space. Hydrocarbon liquid is forced down by gas and created is gas supersaturated zone of higher pressure. After that, injected through pipe-compressor pipes into water-appearing part of bed is plugging agent. Higher pressure zone which is supersaturated with gas is created so that its radius is larger than radius of injecting plugging agent. Pressure is maintained in this zone at level not lower than plugging agent injection pressure. EFFECT: retention of permeability of productive bed zone with high quality plugging of water-appearing part of bed. 1 dwg