The surface morphology of fractures formed by hydraulic fracturing is usually rough. The roughness of the fracture surface is the main reason the actual fracture conductivity deviates from the ideal flat plate model result. In this paper, based on the three-dimensional reconfiguration of actual rough hydraulic fractures, a randomly generated geometric model of a micro-convex body with a rough fracture surface is used as an example of a hydraulic fracture in a shale reservoir. Assuming that the flow in the fracture conforms to the laminar flow pattern, the velocity and pressure fields of the fluid flow on the fracture surface are solved by the finite element method. The effects of micro-convex body size, uniformity, density, and shape on the non-uniform flow of the rough fracture surface are analyzed. The three-dimensional model shows that the average velocity is minimum in the near fully closed fracture. The fluid bypasses the micro-convex body during the flow, forming multiple nonlinear flow regions. The streamlined tortuosity increases with the density and size of the micro-convex bodies and depends on the distribution of the micro-convex areas. The bypassing accelerates the pressure drop and slows down the flow rate. The greater the degree of micro-convex body aggregation, the more significant the decrease in flow velocity. The more locations where the curvature of the micro-convex edge is not zero, the more nonlinear flow zones can significantly reduce the flow rate and thus affect oil and gas production. Targeted optimization of the proppant placement pattern to make the trailing part of the micro-convex body as close to streamlined as possible can reduce the nonlinear flow area and slow down the flow rate reduction.

The increasing application of pad drilling technology in unconventional reservoirs has significantly enhanced development efficiency and reduced operational costs. However, as well spacing decreases, hydraulic fracturing interference between wells has emerged as a critical factor affecting fracture geometry, propagation, and production performance. Despite the adoption of advanced multiwell fracturing techniques, such as zipper fracturing (ZF) and modified ZF (MZF), the mechanisms of stress interference and their influence on fracture propagation remain poorly understood. This study employs the Extended Finite Element Method coupled with the Cohesive Zone Model (XFEM‐CZM) to analyze the effects of stress interference and fracture geometry variations under different fracturing scenarios. The results reveal that when the fracture spacing is large, the stress interference induced by two fractures conforms to the principle of superposition. However, at smaller fracture spacings, stress interference significantly impacts the propagation process and geometry of subsequent fractures, resulting in nonlinear stress interference characteristics. Using the M block in Xinjiang as the study area, this research further analyzes the effects of ZF, MZF, and different fracturing sequences on fracture geometry in multiwell systems. The findings demonstrate that MZF generates longer fractures while ZF exhibits more symmetric propagation characteristics. Moreover, combining MZF with an optimized fracturing sequence maximizes the stimulated reservoir volume (SRV), minimizes casing deformation, and avoids frac‐hit. These results provide theoretical guidance and practical insights for optimizing hydraulic fracturing designs in multiwell pads within tight reservoirs.