FIELD: oil-producing industry. SUBSTANCE: method includes injection into producing well of alkali metal salt solution, water fringe and aqueous solution of acid. Concentration of alkali metal salt solution is higher than concentration of acid solution by a factor of two and more. Volumes of injections equal to 0.4-0.8 cu.m of solutions per cu.m of thickness. EFFECT: higher efficiency. 2 cl, 2 ex
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Authors
Dates
2000-04-27—Published
1997-12-10—Filed