FIELD: oil production.
SUBSTANCE: group of inventions relates to eliminating plugs in an oil well, which lead to damage to the formation and oil wells, cause environmental pollution and corrosion of equipment. A biochemical combined agent for removing organic plugs in oil wells contains 30-50 parts by weight of a biological surfactant and 5-15 parts by weight of a chemical surfactant. The biological surfactant is selected from the group consisting of lipopeptide, rhamnolipid and trehalose lipid. The chemical surfactant is an acidic salt of a hydrocarbyl polyoxyethylene polyoxypropylene ether selected from the group consisting of a carboxylate salt, a sulphate salt, a phosphate salt and a sulfonate salt.
EFFECT: efficiency of removing plugs, the ability to solubilize crude oil, a significant decrease in the oil/water interfacial tension, increasing the efficiency of oil field development by waterflooding.
12 cl, 1 dwg, 17 ex
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