FIELD: oil producing industry, in particular, thermochemical treatment of bottom-hole formation zone. SUBSTANCE: method includes heating of bottom-hole formation zone. This is effected by chemical reaction of aqueous solution of hydrochloric acid and reagent material. Reagent material is used in form of aqueous solution of diethylamine. In this case, diethylamine with subsequent injection of aqueous solution of hydrochloric acid in stoichiometric ratio. EFFECT: increased vertical and horizontal sweep, reduced corrosion of oil field equipment and exclusion of round-trip operations. 2 cl, 1 tbl
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