COMPOSITION TO BLOCK WATER PRODUCING FORMATION Russian patent published in 2010 - IPC E21B33/00 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas industry, particularly to compositions that facilitate blocking and limiting water influx into production wells in both terrigenous and carbonate reservoirs and leveling injection capacity profile in injection wells. Proposed composition comprises liquid-phase polymer in inert hydrocarbon fluid, a carrier, and filler. As liquid-phase polymer, emulsion of polymer SNS S.A.S series EM 140-1540 can be used, carrier fluid can represent mix of alcohol with pure oil, mix ratio making 1:8…1:15, while filler can represent vegetable-based crushed substance preliminary impregnated with alcohol with grain size comparable with formation pore sizes: saw dust or hydrolytic lignine, a chips and saw dust hydrolysis waste with the following weight ratio: %: emulsion polymer - 5 to 20, filler - 1 to 15, liquid-carrier - the rest. Impregnating alcohol can represent methyl, ethyl, butyl alcohols, and ethylene glycol, di-ethylene glycol and poly glycol.

EFFECT: efficient isolation of oil formation bypass manifold.

2 cl, 3 tbl