COMPOSITION FOR WATER INFLOW LIMITATION INTO PRODUCTION WELLS Russian patent published in 2018 - IPC C09K8/512 E21B33/13 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry, methods of limiting water inflow into fractured formations, isolation of absorption zones in terrigenous and carbonate reservoirs, leveling of injectivity profile of injection wells and reduction of water cut in recovered production. Composition for limiting water inflow into production wells providing a viscosity of at least 0.1 Pa*s and an elastic modulus of at least 0.1 Pa, characterized in that it includes the following components, wt%: cationic surfactant (SAS) in an amount of 0.5-6.0, or a composition thereof with an anionic SAS in an amount of 2.0-5.0; anionic water-soluble polymer in an amount of 0.05-0.5; low molecular salt in the amount of 1.0-8.0 with a monovalent cation; cross-linking agent, as which salts of polyvalent metals are used in an amount of 0.002-0.05; water - balance. Invention is developed in sub-claims.

EFFECT: technical result when using the invention is in reducing of the water cut of oil-saturated sections of the formation and in equalization of the injectivity profile of injection wells.

6 cl, 6 dwg