FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry and can be used for bottom-hole acid treatment, represented by carbonate reservoirs. Composition for acid treatment of bottomhole formation zone includes, wt%: inhibited hydrochloric acid 37.5–95.8; reagent CHO-ITPS – 707 A 2.0–9.0; reagent ITPS-906 K 0.5–6.0; mixture of carbohydrates and a solution of surfactants in mineral acid – reagent ITPS-708 A 0.5–2.0; water – balance.
EFFECT: development of a composition for acid treatment of the bottomhole formation zone, which is fully compatible with the oil of PJSC Tatneft, namely by dispersing the deposits of resinous sediments and eliminating the formation of emulsions upon contact of the acid composition with oil, high recovery rate of iron ions, low corrosion rate, as well as low values of contact angle of wetting and interfacial tension and high penetrating ability in the formation.
1 cl, 3 tbl
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