Practical experience in the exploitation of hydrocarbon deposits confirms the presence of geomechanical processes and their significant impact on the state of gas-saturated rock massif. The purpose of the paper is to clarify the geological conditions for the formation of technogenic reservoirs and involving additional volumes of gas under the impact of geomechanical factors while operating the gas deposits. A detailed analysis of the known gas and gas condensate fields at the Eastern oil-and-gas-bearing region of Ukraine has been carried out. In particular, changes in formation pressure of in-operation hydrocarbon deposits have been determined, the values of geostatic and effective rock pressures have been calculated, the thickness of the gas column and the volume of gas reserves growth have been compared. All of the abovementioned have granted the possibility to determine the role of geomechanical processes in assisting to produce additional volumes of gas. A formation pressure increase in a number of gas condensate fields at a late stage of development confirms the action of the formation of additional sources of hydrocarbons due to the geomechanical factor. It is shown that at the first stage of the exploitation of hydrocarbon deposits, geological criteria play a decisive role in the formation of the gas-saturated massif condition. Over time, during field exploitation, geomechanical criteria are added to the geological ones, which help to involve additional volumes of gas. At the same time, the resulting increase in reserves at some deposits is up to 50% or more. It has been established that additional volumes of gas are directly proportional to the capacity of the gas-bearingness stage and the total volume of the gas-bearing structure. Multilayer deposits of sandy-aleuritic composition with a large number of productive horizons and without thick persistent reservoir-seal rocks within a single gas-bearingness stage with a hydrodynamic link between productive layers are the most promising from the viewpoint of the researched mechanism (favorable due to the formation of additional reservoirs of technogenic genesis).

The practical experience of long-term operation of hydrocarbon deposits confirms the presence of geomechanical processes and their significant impact on the state of the gas-saturated massif of rocks. In fields that are being operated for a long time, the prospects for industrial hydrocarbon accumulation can be associated with secondary gas traps of non-traditional type, in particular, technogenic ones, which are formed in low-pore reservoirs. A detailed analysis of the geological conditions of the East-Novoselovskyi field was carried out. They contribute to the formation of additional gas resources (“behind-pipe reserves” category), as well as the establishment of geological-industrial indices of the perspectivity for the formation of technogenic deposits was carried out. The purpose of the work is geological justification and finding perspective zones for the accumulation of behind-pipe reserves through the formation of technogenic deposits under the impact of a geomechanical factor, using the example of the East-Novoselovskyi oil-gas condensate field. For the geological conditions of the East-Novoselovskiy Oil-Gas Condensate Field, producing the additional gas reserves should be expected from technogenic deposits that are located above the industrial horizons that are being developed and formed in low-porous reservoirs under the action of a geomechanical factor, as a result of their decompaction after gas extraction from an industrial reservoir as a result of its compression. In accordance with the conducted research, the most perspective section, from the standpoint of the formation of a technogenic deposit and the accumulation of behind-pipe reserves, within the East-Novoselovskyi Oil-Gas Condensate Field there is the strata identified in the area of wells No. 16, 18, 60, in the section interval at a distance of 92.4 m up from the roof of the horizon (B-3b), which is located from a depth of 2141 m to the roof of the horizon B-3a, at a depth of 2 233 m. It is worthwhile to further carry out appropriate geophysical work for conducting the technological work for the development of technogenic deposits in perspective zones behind the casing column in operated wells. The account of the geomechanical factor opens up the perspective of producing the additional industrial gas influx at the late stages of the development of gas and gas-condensate fields, by predicting the geological conditions for the formation of the improved secondary filtration-capacitive properties favorable to form technogenic gas deposits.