Purpose. Substantiation of the intensity values of elastic waves in the bottom-hole zone required to form a network of cracks in the formation as well as pilot verification of the results. Methodology. Analytical and experimental research studies have been carried out on the clays sandstone with a tensile strength of 2,4 MPa, which has been treated by pressure pulses with duration of the leading front of up to 5 ms and amplitude of up to 6 MPa. The parameters of the research studies have been measured by standard equipment ATM-38. Findings. The calculations confirm the possibility of creating variable pressure with amplitude of more than 1,2 MPa in the reservoir at a distance of 1 m from the downhole hydraulic generator. Industrial studies indicate the possibility of creating stresses in a near-wellbore zone which exceed the limit of the fatigue strength of the rock. This results in formation of additional cracks in the bottom-hole zone and, thus, more effective completion of the wells. Originality. It is a new approach to the selection of the downhole generator parameters for creating a network of cracks in the formation on the basis of fatigue fracture rock. Practical value. The results of the research can be used for testing the influence of cyclic stresses on the increasing quantity cracks in coal layers for degassing them and for creating new technologies of the oil and gas wells completion.

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