METHOD FOR DEVELOPMENT AND OPERATION OF A WELL AFTER ACID TREATMENT OF AN OIL RESERVOIR Russian patent published in 2022 - IPC E21B43/00 E21B43/12 E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of the oil and gas industry, and in particular to a technique for intensifying the inflow of reservoir fluids into a well in oil fields, and can be used in well development after acid treatment of a productive oil reservoir. The method consists in using a downhole electric centrifugal pump with adjustable capacity and a downhole packer. In this case, two check valves are mounted in the packer, capable of passing fluids in different directions from the packer. The first valve opens when a pressure drop occurs and passes fluids from bottom to top, the second - electromagnetic - valve opens and passes fluids in the opposite direction - from top to bottom on command from the well control station when the pressure in the pump zone drops below the allowable value. The packer is located above the electric submersible pump. The electric centrifugal pump is lowered to a predetermined depth. The packer covers the annular space between the casing string and the tubing string. The electric centrifugal pump is put into operation for pumping downhole and reservoir fluid to the earth's surface.

EFFECT: ensuring a constant and time-controlled inflow of reservoir products into the well after acidizing the reservoir, equal to the performance of an electric centrifugal pump, with the exclusion of overheating of the submersible motor.

1 cl, 1 dwg