| 摘要 |
FIELD: oil producing industry, particularly, methods of oil recovery from carbonate reservoirs; applicable for increasing recovery of difficulty recoverable oil reserves. SUBSTANCE: method consists in injection into carbonate formation of portions of aqueous solution of alkali sewage of caprolactam production at pH <2, saturated monobasic alcohols and oil-soluble light hydrocarbons with their subsequent removal or advancing of fringes over carbonate formation with water. Mineral acid is introduced in solution for regulation of pH. Coefficient of oil recovery increases by 9.7%. EFFECT: higher efficiency of oil recovery from formation. 2 cl, 1 dwg, 4 tbl, 1 ex
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