FIELD: oil and gas industry.
SUBSTANCE: composition for acid treatment of bottomhole formation zone contains, wt %: hydrochloric acid 12-15; acetic acid 1.0-5.0; hydrophobization agent IBB-1, 0.5-1.2; ascorbic acid, 0.5-0.7; oxyethylidene diphosphonic acid, 1.0-1.2; sodium metabisulfite, 0.03-0.05; the rest is water.
EFFECT: low corrosion activity of the acid treatment composition, sustained reaction rate of for acid treatment composition with carbonate rock, absence of asphalt-tar-paraffin deposits due to low interfacial surface tension at the border with oil, prevention of secondary precipitates, high capacity of iron binding.
2 dwg
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