FIELD: oil production industry. SUBSTANCE: method is intended for increasing oil output from flooded oil beds which are non-uniform as to permeability. According to method, injected into bed through injection wells is solution of alkali metal silicate and mineralized water, and oil recovered through producing wells. Prior to injection, solution of alkali metal silicate and mineralized water are mixed together up to colloidal condition. Used in function of solution of alkali metal silicate is solution of alkali metal silicate in water with concentration of 0.05-20 mass%. Used in function of mineralized water is brine and effluent water containing inorganic salts with mineralization of 2.5-15.0 mass %. Application of aforesaid method ensures higher oil yield from productive bed. EFFECT: higher efficiency.
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Authors
Dates
1999-07-27—Published
1998-05-29—Filed