FIELD: oil and gas industry.
SUBSTANCE: composition for hydrochloric acid treatment of bottomhole zone of wells in carbonate reservoirs of delayed action contains, wt.%: hydrochloric acid 12-18; sodium chloride 6.0-10.0; technical sodium lignosulphonate 2.5-5.0; surfactant for intensification of oil production Neftenol-VKS 2.0-5.0; solution of quaternary ammonium salts – products of condensation of tertiary amines and benzochloride – hydrophobisator Neftenol-GF 1.0-3.5; oxyethylidene diphosphonic acid 2.0-3.5; water – the rest.
EFFECT: increased efficiency of treatment of bottomhole formation zone, formation of extended channels of high permeability, increased coverage of reservoir rock by acid action.
1 cl, 4 dwg, 1 tbl
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