FIELD: technological processes.
SUBSTANCE: group of inventions relates to methods for treating a subterranean formation with acidic solutions. In the method, the aqueous composition for treating and stimulating a formation in an underground well contains hydrochloric acid in a concentration of from 8 to 28 wt.% and at least one amino acid, moreover, the molar ratio of amino acid/hydrochloric acid is from 0.2 to 1.5, and there is enough water to dissolve hydrochloric acid and amino acid, and wherein the amino acid is selected from the group consisting of alanine, asparagine, aspartic acid, cysteine, glutamic acid, histidine, leucine, lysine, methionine, proline, serine, threonine, valine, and combinations thereof.
EFFECT: slowing down the reaction between the acid and the underground formation and, as a consequence, promoting an increase in the permeability and productivity of the underground formation.
24 cl, 1 dwg, 1 tbl, 1 ex
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