COMPOSITION FOR TREATING BOTTOM ZONE OF OIL STRATUM AND/OR INCREASING OIL RECOVERY OF STRATUM

摘要

FIELD: oil and gas production. SUBSTANCE: emulsion contains 2.0-20.0% of special-type emulsifying agent, 3.0-16.0% of oxyethylenated isononylphenols with oxyethylenation degree 4-12, and hydrocarbon solvent - the balance. EFFECT: increased viscosity and stability of emulsions formed by mixing with water in washed zones, leveled profile of bottom zone injectivity, increased formation coverage, and reduced oil viscosity. 2 tbl