FIELD: petroleum industry.
SUBSTANCE: invention relates to the oil production industry. The solid base of the compound for acid treatment of the terrigenous reservoir contains (% by weight): the product of interaction of the nitric acid with carbamide 40-45, oxyethylidenediphosphonic acid 40-45, ammonium fluoride or bifluoride 7.5-12.5, powder-like surface active substance "ГФ-1С" 2.5-5, the weight ratio of the said product and acid being 1:1. The base may additionally contain aluminum chloride and working solutions are prepared with a concentration of 13-35%.
EFFECT: increased producibility of oil recovery.
3 cl; 2 tbl; 1 ex
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