METHOD FOR ELIMINATION OF BEHIND-THE-CASING WATER INFLUX INTO WELL OF DEVIATED PROFILE EQUIPPED WITH LINER-FILTER Russian patent published in 2025 - IPC E21B33/138 E21B43/32 

FIELD: oil and gas industry.

SUBSTANCE: disclosed is a method for elimination of behind-the-casing water influx into a production gas well of an inclined profile, equipped with a liner-filter, characterized by the fact that water shutoff works are performed by creating a sustained cement barrier ring along the behind-the-casing space between the liner-filter and rocks, for which perforation holes are shot through the liner-filter, then process tubing with packer is lowered to interval of newly formed perforation holes, and packer is installed in productive interval roof, then cement mortar is pumped for absorption into the flooded section in a volume which allows to form a radius of penetration of the cement mortar of not less than 1.5 meters, wherein the mode of pumping and pushing into the formation of cement grout is provided to the maximum value of injectivity, after the cement hardening waiting period is over, the cement bridge roof is formed in the wellbore in the natural seals occurrence interval by the outgoing filling method, the process tubing with the packer is removed to the surface, after the cement hardening period is over, a cement sleeve is drilled in the well bore to the target interval, a hydrochloric acid bath is installed and the well is left for process exposure.

EFFECT: improving reliability of the cement barrier ring, which excludes inflow of formation water through the behind-the-casing space between the liner-filter and rocks.

1 cl, 3 dwg