FIELD: oil and gas industry.
SUBSTANCE: sludge-forming for control of well input profile containing sodium salt of naphthenic acids and water contains additionally soap stock saponified by sodium alkali, oxyalkylised alkyl phenol and methanol with the following ratio, wt %: soap stock saponified by sodium alkali - 35-40, sodium salt of naphthenic acids - 10-15, oxyalkylised alkyl phenol - 5, methanol - 20, water 20-25.
EFFECT: improvement of sludge-forming oil-washing properties, washing and dispersing properties in regard to deposits of asphalts, resins and paraffins.
3 ex, 1 tbl
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