METHOD FOR WATER INFLUX ZONE ISOLATION IN WELL Russian patent published in 2006 - IPC E21B33/138 C09K8/82 C09K8/84 

FIELD: oil production, particularly to perform remedial cementing operations in gas and oil wells.

SUBSTANCE: method involves serially injecting water-in-oil emulsion portions in well interval to be isolated, wherein the water-in-oil emulsion is based of dispersed aqueous phase and dispersed hydrocarbon phase and dispersing hydrocarbon medium, injecting plugging composition, which reinforces waterproofing screen created in reservoir. The plugging composition is injected in alternation with water-in-oil emulsion. Silicone fluid is added to water-in-oil emulsion in amount of 5-10% of dispersing hydrocarbon medium volume. The plugging composition is silicone fluid mixed with 8% hydrochloric acid solution. The components are taken in the following amounts (% by volume): silicone fluid - 85-92, 8% hydrochloric acid solution - 8-15.

EFFECT: improved efficiency due to increased water-in-oil emulsion viscosity and water-in-oil emulsion portions strengthening with plugging composition having high ability to formation penetration, improved structural and mechanical properties and adhesion to rock.

1 ex, 1 tbl, 1 dwg