WATER AND GAS INFLUX LIMITING METHOD WITH WELL PRODUCTIVITY RECOVERY Russian patent published in 2015 - IPC E21B33/13 E21B43/32 E21B43/114 

FIELD: oil and gas industry.

SUBSTANCE: water and gas influx limiting method with well productivity recovery includes running in of a perforator at the flow string, perforation of the production casing, isolation of water and gas influx and elimination of leak-tightness failures in the production casing by injection of isolating compound through new openings thus forming a water-shutoff screen. At that perforation of the production casing and injection of the isolating compound are carried out during one trip of the perforator. A hydromechanical perforator designed to make openings in the production casing and further injection of the isolating compound is used as a perforator. At that perforation of the production casing is made within the interval of water and gas inflows.

EFFECT: providing reliable recovery of productivity and injection capacity of wells, improving efficiency of stratal water isolation, reducing quantity of round-trip operations.

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