FIELD: oil industry.
SUBSTANCE: invention relates to oil and gas industry. Method of development of flooded oil formation involves pumping into the oil formation through an injector a 10 % aqueous solution of a mixture of sodium salts of lignosulphonic acids, a composition of 10 % aqueous solution of alkaline drain of caprolactam production, a multicomponent mixture containing synthetic anionic, nonionic surfactants, oxyethylated alco-ethers of phosphoric acid, a hydrocarbon solvent and an aliphatic or aromatic alcohol, with the following ratio of components, wt%: the said aqueous solution of alkaline drain of caprolactam production 99.3-99.7; the said multicomponent mixture 0.25-0.45; aliphatic or aromatic alcohol 0.05-0.25.
EFFECT: technical result is increased oil recovery of flooded oil formation due to separation of residual oil.
1 cl, 3 dwg
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