METHOD FOR ISOLATION OF BOTTOM WATER INFLOW IN OIL WELLS Russian patent published in 2016 - IPC E21B43/32 C09K8/42 

FIELD: oil and gas industry.

SUBSTANCE: method for isolation of bottom water flows to oil well comprising injecting into well waterproofing composition to form a waterproofing screen, characterised in that in case of lifting of bottom water and overlapping its lower holes of perforated interval performing well killing, setting cement bridge overlapping perforation interval of 5 m from top of producing formation, drilling of bridge, making perforations of 1 m layer at 1.5-2.0 m below OWC, establishment of first waterproofing screen from composition based microdur, perforation of 1-2 m layer in plane of the OWC and pumping to install screen in plane of OWC, selective composition with diatomite and makeup in a radius of 1-2 meters composition based on microdur, re-perforating producing formation, call flows, well completion and putting into operation.

EFFECT: technical result of invention consists in increase of radius and strength of waterproof screen and increasing well watering start time.

1 cl, 4 tbl