Introduction. Gas and gas condensate reservoirs are often connected to waterpressure systems and are developed under water-drive [1]. The difficulty of extracting residual gas reserves in conditions of the inflow of formation water into productive deposits is associated with the watering of gas-saturated formations and wells.A significant number of experimental and theoretical studies are devoted to the design of a rational system for the development of water-driven hydrocarbon reservoirs [2][3].Based on the results of the studies, the mechanism of behavior of gas trapped by formation water in a porous medium was revealed. It was also found that the nature of the distribution of the reservoir properties of the reservoir introduces significant uncertainty in the process of substantiating the optimal technology for further field development under an active water-drive. It is the heterogeneity of productive formations, both in area and in thickness, which plays a decisive role in the selection and implementation of the developed technologies for enhancing recovery.Objective. Investigation of the influence of productive reservoir heterogeneity on formation water inflow during injection of carbon dioxide at the initial gas-water contact using a different number of injection wells.Results and discussion. Nowadays the direction of EOR in gas and gas condensate fields by injecting non-hydrocarbon gases (nitrogen, carbon dioxide, flue and waste gases, mixtures of various gases) remains promising [4][5].One of the most successful technologies for increasing the production of residual gas and reducing the activity of the water system is the injection of CO2 into the reservoir. According to the studies carried out, it was found that due to the