FIELD: oil producing industry. SUBSTANCE: the offered method includes injection into formation through injection well of working medium and water and withdrawal of oil from producing well. Prior to injection into formation of working medium injected into producing well is 0.05-2.0 % aqueous solution of powdery cross-linked polyacrylamide with water mineralization of up to 30 g/l. In this case, water mineralization should equal or exceed the existing mineralization. Working medium is used in form of aqueous solution of nonionic surfactant. EFFECT: higher efficiency. 1 tbl
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Authors
Dates
1997-05-20—Published
1992-09-21—Filed