FIELD: oil and gas producing industry. SUBSTANCE: invention deals with compositions for intensification of oil recovery with the aim to restrict water inflows to producing wells and to increase oil recovery. Composition contains biological surfactant and oil, and additional lignosulfonate with the following ratio of components, wt. %: biological surfactant, 40-50; lignosulfonate, 5-25; oil, the balance. EFFECT: higher efficiency of composition effect in process of oil displacement due to amplification of its emulsifying capacity, emulsion stability in time and viscosity. 2 tbl
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Authors
Dates
2002-09-10—Published
2001-04-06—Filed