FIELD: oil and gas production. SUBSTANCE: composition for treatment of formation bottom zone contains 5.0-23.0 wt.% inhibited hydrochloric acid (on conversion to pure HCl), 2.0-10.0 wt.% of hydrofluoric acid, and saturated (at least 1380 kg/cu.m) calcium chloride solution (the balance). Composition is utilized in the form of concentrated (70-75 vol.%) aggregatively stable reverse emulsion in kerosene, to which emulsifying component is added in the form of natural film-forming components of crude oil. EFFECT: reduced consumption and corrosion activity of composition and improved reservoir properties of exposed productive formation. 2 cl, 2 tbl
