FIELD: oil, gas and coke-chemical industry.
SUBSTANCE: invention relates to oil production. Composition for increasing the efficiency of hydrochloric acid treatment includes, wt.%: zwitterionic surfactant - cocamidopropyl betaine 3.5–12.6; anionic surfactant - disodium laureth-3 sulphosuccinate 1.5–5.5; hydrochloric acid 6–22; calcium chloride 1–6; corrosion inhibitor based on nitrogen-containing surfactants 0.6–1.5; surfactant-based demulsifier 0.05–0.2; anti-settling agent based on ethoxylated alcohols and methanol 0.05–0.1; iron stabilizer based on organosulphur compounds and surfactants 0.8–1.6; distilled water is balance.
EFFECT: increased efficiency of hydrochloric acid treatment of carbonate reservoirs.
1 cl, 10 tbl
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