FIELD: oil and gas production.
SUBSTANCE: composition contains 10-15% inhibited aqueous hydrochloric acid, 0.2-0.5% surfactant (Sinterol AFM-12), 2.5-5% calcium acetate or 5-10% calcium acetate/acetic acid 1:1 mixture, and water to 100%.
EFFECT: increased permeability of bottom zone of the stratum.
1 dwg, 2 tbl, 4 ex
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