METHOD OF OIL DEPOSIT DEVELOPMENT Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, methods of development of nonuniform oil formation with restriction of water inflow into producing wells and increased oil recovery. SUBSTANCE: method includes injection of aqueous solution of biological surfactant KShAS-M together with biological product and water glass and forcing of reagents through injection well into formation by fresh water; simultaneous injection of aqueous solution of salts, biological surfactant KShAS-M together with biological product and water glass. Biological product is used in the form of product of biotechnological synthesis containing at least 40% of protein. Aqueous solution of salts is used in the form of solution of multivalent metals. EFFECT: higher efficiency of clogging of highly permeable layers and restriction of water inflow into producing wells. 1 tbl, 2 ex