FIELD: oil and gas industry.
SUBSTANCE: invention relates to the oil-producing industry. Composition for treatment of bottom-hole zone of oil formation, containing mixture of cocamidopropyl betaine, anionic surfactant, non-ionic surfactant and water, contains an anionic surfactant sodium alkyl benzene sulphonate, as a nonionic surfactant – cocamide diethanolamine or diethanolamine, fresh water, additionally as alkali contains sodium hydroxide in following ratio of components, wt%: cocamidopropyl betaine 10.0–25.0; sodium alkylbenzene sulphonate 1.0–4.0; cocamide diethanolamine or diethanolamine 0.1–3.0; sodium hydroxide 7.0–15.0; fresh water – balance.
EFFECT: higher extraction efficiency of high-viscosity oil and reduced water content of well products.
1 cl, 3 dwg, 1 tbl
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