The main reasons for the destruction of the bottomhole formation zone and the carryover of sand to the surface are characterized. It is shown that one of the main reasons is the inflow of formation waters into the productive part of the reservoir, which leads to the interaction of the aqueous phase with solid rock. As a result of watering wells, a pressure difference arises, which leads to fluid leakage through the pores of the rock - fluid filtration through the rock. The PipeSim program was used to evaluate the impact of different water factor values on the productivity of a gas well with a gravel pack in a perforated production casing and a well with a gravel pack in an open hole. The nodal analysis of the well operation is shown and the parameters of stable operation of the well are given. The results of studies of the influence of the water factor on the productive characteristics of wells are shown in the form of graphical dependences of gas and liquid flow rates and bottomhole pressure on the studied parameter. For graphical dependences of gas flow rates on the water factor, an equation with high correlation coefficients was selected. It has been established that with an increase in the water factor, the bottomhole pressure and fluid flow rate increase, and the productivity of gas wells decreases significantly. Based on the studies performed, a relative increase in gas flow rate with a decrease in the water factor is shown. For a well with a gravel pack in a perforated production string, the gas flow rate decreases by 2.04 times, and for a well with a gravel pack in an open hole, by 1.33 times. The performance of a well with a gravel pack in an open hole in the absence of fluid in reservoir production is 1.86 times higher than the productivity of a well with a gravel pack in a perforated production string, and with a water factor of 50 l/th.m³ – 2.84 times