FIELD: petroleum industry.
SUBSTANCE: invention relates to a method for treating an underground formation by introducing a monovalent salt of monochloroacetic acid into said underground formation in the presence of a chelating agent containing at least one carboxylate group with a monovalent counterion and additionally containing a carbon chain carrying at least five hydroxyl groups. Preferably, the cation of the monovalent salt of monochloroacetic acid is sodium.
EFFECT: development of a new method for treating an undeground formation.
17 cl, 3 tbl, 5 ex, 2 dwg
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