METHOD FOR ISOLATING BOTTOM WATER CONE OF FORMATIONS LOCATED AT SHALLOW DEPTHS Russian patent published in 2023 - IPC E21B33/138 E21B43/32 

FIELD: oil industry.

SUBSTANCE: invention can be used to limit and eliminate the influx of bottom water from formations located at shallow depths. A method is claimed for isolating the bottom water cone of formations located at shallow depths, which includes lifting a pipe string with a pump, lowering equipment into the well to determine the zone of the bottom water cone, and isolating the perforation interval in the productive formation zone. Next, the well is flushed. The lower interval of well perforation is performed in the lower part of the well and a pipe string with a packer is lowered into the well. In this case, the packer is placed below the perforation interval located in the productive formation zone. Hydraulic fracturing of the formation is carried out in the zone of the lower perforation interval with opening of cracks to a depth exceeding the maximum diameter of the bottom water cone. Next, cement mortar is pumped into the formation. After that the string with the packer is lifted and the well is left to wait for the cement mortar to harden. Then the perforation interval in the productive formation zone is reperforated.

EFFECT: increasing the efficiency of isolation of plantar waters from the perforation zone.

1 cl, 2 dwg