Simulation of Liquid Carrying Capacity of Process Wells in Carbonate Bottom Water Gas Reservoirs

During the development process of carbonate rock bottom water gas reservoirs, bottom water is prone to water channeling along the high permeability channels of fractures and caves, resulting in relatively high water production after water breakthrough in gas wells. However, traditional methods for calculating the critical liquid carrying capacity of gas wells have limitations in calculating the liquid carrying capacity of gas wells and the unsteady flow of gas-water two-phase flow when the water production is high. The calculation results have significant errors, making it difficult to guide the formulation of waterproof and water control measures for carbonate bottom water gas reservoirs. Therefore, by introducing computational fluid dynamics (CFD) simulation technology, this paper has realized the numerical simulation calculation of gas water two-phase unsteady flow in directional wells (horizontal wells and highly deviated wells) under different formation inflow boundary strips, visualized and quantitatively analyzed the change law of gas water two-phase flow pattern in directional wells under different production conditions and the liquid carrying production capacity of gas wells, and mastered the inhibitory effect of gas well water production on gas production, Solved the suitability of directional well waterproofing and water control, as well as the optimization design of well trajectory, providing a new technical means for water control and development of carbonate rock bottom water gas reservoirs.