The results of laboratory tests on the effect of the acid-generating composition, developed by the Cleansorb Ltd. Company, on the cores of the productive deposits of the Kuyumbinskiy license area are considered. The porous fractured type of reservoir is represented by five groups of the dolomites of different lithologic types, porous type - by dolomitized aleurolites. The time of the acidic composition generation, its solvency and time of holding in the core are determined. The result of the acid-generating composition effect on the dolomites of porous fractured type became an increase in opening and volume of fractures, porosity, permeability.
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