FIELD: oil and gas production.
SUBSTANCE: composition comprises, wt %: inhibited aqueous hydrochloric acid (calculated as HCl) 5.0-24.0, hydrofluoric acid 2.0-10.0, acetic acid 1.0-10.0, surfactant 0.1-5.0, polyphosphate 0.01-5.0, all-purpose reagent (RDN-U) 1.0-50.0. Composition deeper penetrates hole-bottom zone of formation.
EFFECT: enhanced hole-bottom zone treatment efficiency so intensifying oil production, reduced possibility of precipitation from spent solution, and reduced corrosion effects.
2 dwg, 3 tbl
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