FIELD: chemistry.
SUBSTANCE: composition for the acid treatment of the bottom-hole formation zone contains, by wt %: 15.0-40.0 acetic acid; 1.0-3.0 hydrofluoric acid; 0.5-4.0 tetrasodium ethylenediamine-N,N,N',N'-tetraacetic acid, trilon B; 1.5-6.0 trisodium salt of N- (hydroxyethyl) ethylenediaminetriacetic acid trilon D; 3.0-7.0 ammonium chloride; 0.5-2.0 N-laurylsodium-β-iminodipropionat Deriphat 160 C; 2.0-6.0 corrosion inhibitor; water - the rest.
EFFECT: increasing the dissolution selectivity of acid-soluble minerals and terrigenous reservoirs and the precipitation-holding abilities.
2 dwg, 3 ex
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