A Hybrid Model for Simulating Fracturing Fluid Flowback in Tight Sandstone Gas Wells considering a Three-Dimensional Discrete Fracture

Abstract Two-phase (gas+water) flow is quite common in tight sandstone gas reservoirs during flowback and early-time production periods. However, many analytical models are restricted to single-phase problems three-dimensional fracture characteristics seldom considered. Numerical simulations good choices for this problem, but it time consuming gridding simulating. This paper presents a comprehensive hybrid model characterize two-phase behaviour predict the performance of fractured well with discrete fracture. In approach, hydraulic discretized into several panels transient equation solved by finite difference method numerically. A volumetric source function superposition principle deployed capture reservoir analytically. The responses obtained coupling dynamically. accuracy practicability proposed validated numerical simulation result. results indicate that highly efficient precise simulating gas/water evaluating wells considering also show rate will be overestimated without addition, influences permeability, half-length, matrix permeability on significant. higher larger at early period, curves merge after fracturing fluid flows back. half-length can enhance rate.