FIELD: oil and gas industry.
SUBSTANCE: invention relates to the field of oil and gas production. Hydrochloric acid composition for treatment and clay cake removal of the bottomhole formation zone contains the following, wt%: inhibited hydrochloric acid 8–10; acetic acid 8–10; formic acid 8–10; complexone – oxyethylene diphosphonic acid 5–7; isopropyl alcohol 4–6; surface active substance neonol AF 9-12 1–2; water – balance.
EFFECT: high solvency and degree of stabilization of not only the carbonate matrix of the collector and dispersion of the polymer-clay filter cake, but also dissolving capacity and dispersion of terrigenous (sand-clay) low-permeability reservoirs, versatility of composition.
1 cl, 2 tbl
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