To increase or to reduct the deteriorated permeability of the bottom hole of a well, usually solutions of sulphuric acid its modifications are used depending on the physical-lithological composition of a rock in a layer in different variants. The main deficiency of the sulphuric acid solutions for the treatment of the bottom hole is a high rate of the chemical reaction between the acid and carbonaceous rocks, though, with the decrease of the rate of interaction, favourable terms for the increase of depth of the penetration of the acid into a layer are formed. For this reason, of great interest are the ways of the increase of a well by the change of acid-containing products. As a result of laboratory investigations it has been determined possibility to use solutions of the exhausted sulphuric acid for the chemical zone of the well.
It has been determined the use of solutions of the exhausted sulphuric acid, in certain terms will allow to increase the productivity of wells.

The essence of the method is, that to increase the productivity of wells, boring the terrigenous reservoirs, as an acid reagent solutions of the sulphuric acid or its derivatives, in particular, the exhausted sulphuric acid, are used. Moreover, after the completion of the treatment of the bottom hole, to prevent the sedimentation in rocks as a result of the intereaction of the acid with carbonates, the well is put into operation after the 8-hour standstill and at large depressions on the bottom hole zone.