Study on the Fracture Propagation in Multi-Horizontal Well Hydraulic Fracturing

Multi-horizontal well hydraulic fracturing is a widely employed and highly effective method for stimulating tight shale reservoirs. However, most existing studies primarily focus on investigating the impact of intra-well interference fracture propagation while neglecting influence inter-well interference. Here, multi-well hydraulic-fracture-propagation model established to examine effects within system. In this study, based bilinear T-S criterion, stiffness degradation used describe damage evolution process fracture, coupling fluid flow solid deformation realized, dynamic distribution inter-fracture realized by using Kirchhoff function basis cohesive zone (CZM) finite element model. Finally, fracture-propagation multiple horizontal wells established. Based model, mechanism studied, law Young’s modulus displacement in multi-wells investigated. The results show that reservoir can be divided into self-influence area, tension area compression according stress state multi-wells. rate fractures significantly accelerated when they propagate local generated tip neighboring wells, rapidly decreases as continue wells. Rocks with lower tend more plastic, forming usually lengths larger widths. has an inhibitory effect closer each other gradually increases distance decreases. dominance dominant under As propagates areas fractures, feed will brief rise then eventually stabilize. This study quantifies lays foundation treatment optimization small spacing fracturing.