The features of the final stage of development of gas deposits are given. Known methods for increasing gas recovery from depleted gas deposits are characterized. A new approach to solving the problem of increasing the efficiency of the additional development of depleted gas deposits is proposed, including an analytical and technical and technological justification for methods for minimizing the values of the final reservoir pressure in the drainage zone of production wells, technologies for extracting residual gas from poorly drained, low-permeability zones of the reservoir by injecting non-hydrocarbon gases, in particular, nitrogen, technologies for regulating the process of additional development of depleted gas deposits in the water drive by actively influencing the movement of the gaswater contact and extracting trapped gas from flooded zones. According to the research results, it was found that in order to minimize the values of the final reservoir pressure and to increase the final gas recovery from the deposits, it is necessary to reduce the pressure at the inlet to the complex gas treatment unit and the pressure loss during gas movement in the bottom hole zone, wellbore and discharge lines of wells; on deposits with macro-heterogeneous reservoirs, a combined system for placing vertical, directional and horizontal wells with interval hydraulic fracturing along the length of the horizontal wellbore should be used; in order to obtain high technological indicators for the additional development of depleted gas deposits in the water drive, it is necessary to ensure the alignment of the position of the waterfront, as well as to remove part of the restrained gas from the flooded zones by injecting nitrogen into near-edge wells located in zones of active formation water inflow into the deposit. To prevent the breakthrough of nitrogen into the gas-saturated part of the deposit and production wells, it is necessary to periodically pump specific volumes of water, aqueous solutions of surfactants, and aqueous suspensions of various substances into injection wells. The proposed developments will increase the current gas production from depleted deposits and the final gas recovery factor
Received 13.12.2021
Revised 15.03.2022
Accepted 23.05.2022
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