FIELD: oil and gas industry.
SUBSTANCE: surface-active acid composition for treatment of carbonate basins contains the following, wt %: hydrochloric acid (in terms of HCl) 6.0-24.0; alcohol-containing compound 5.0-30.0; surface-active substance - SAS, commercial washing agent "ZheniLen" 0.5-2.0; cationic surface-active substance - OksiPAV or Don-96 0.2-1.0; iron stabiliser 0.5-3.0; water is the rest.
EFFECT: intensifying oil production; providing compatibility of a treatment compound and a formation fluid even at available ferric iron in the quantity of 2000 ppm and more, stability to freezing at simultaneous preservation of property of retardation of speed of the reaction with carbonate rock.
3 cl, 2 tbl, 1 ex, 1 dwg
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