FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular to micellar solutions for oil extraction from formations. Micellar solution for extraction of oil, containing a mixture of a zwitterionic and an anionic surfactant and fresh water, contains as anionic surfactant sodium lauryl sulphate, as a zwitterionic surfactant – cocamidopropyl betaine and additionally a nonionic surfactant Neonol AF9-10 at following ratio of components, wt%: sodium lauryl sulphate – 1.71, cocamidopropyl betaine – 5.61, Neonol AF9-10 – 8.86, fresh water – balance.
EFFECT: higher intensity of oil recovery and high viscosity of oil-saturated part of productive formation and limiting water influx from water-saturated part of same formation.
1 cl, 1 tbl, 2 dwg
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