OIL PRODUCTION METHOD Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: method relates to oil recovery from non-uniform bed with carrying out isolating operations for levelling of injectivity profile of injection wells and for limiting water inflow to producing wells. Method implies injection into bed of polyacrylamide solution and cross-linking system, with undertaking of technological curing period. Used in function of cross-linking system is zeolite-containing rock matter which is preliminarily treated by sulfuric or muriatic acid. Injection of polyacrylamide solution and zeolite-containing rock matter preliminarily treated by sulfuric or muriatic acid is performed simultaneously or separately. Application of aforesaid method is ecologically safe with respect to environmental medium. It allows for more efficient treatment of watered beds due to redistribution of filtration flows and involving zones of high oil saturation into development. It also reliably isolates water inflow to producing wells. EFFECT: higher efficiency. 1 cl, 1 tbl, 5 ex