FIELD: oil production industry. SUBSTANCE: this relates to compounds and methods for recovery of oil based on using hydrocarbon and/or oil solutions of surface-active materials which can independently create stable emulsions. Included in compound as surface-active material are condensation products of ethylene oxide with hydrocarbon derivatives containing labile atom of hydrogen - hydroxyethylated derivatives of fatty alcohols, acids, alkylphenols - 15-25 mass%. Used as oil phase is heavy asphalt-resin oil with density of 900 kd/m3 and higher with content of asphaltenes being 10% and more - 50-70 mass%. Used as solvent is regulator increasing solubility of non-ionogenic surface-active materials and asphalt-resin components in oil - carbon tetrachloride or chloroform - 15-25 mass%. According to method of producing compound, initially mixed are surface-active materials and solvent-regulator in proportion of 1:1, then at constant mixing obtained solution is introduced into oil phase in amount of 30-50%. Application of aforesaid compound enhances oil sweep-out properties and reduces absorption of surface-active materials. EFFECT: higher efficiency. 2 cl, 2 tbl
Authors
Dates
1999-01-27—Published
1997-04-01—Filed