Numerical simulation of hydraulic fracture propagation after thermal shock in shale reservoir

• DOI: 10.1007/s13202-023-01744-w
• Publication Date: 2024-01-22T08:03:01Z
• Authors: Jianfa Wu; Bo Zeng; Liqing Chen; Haoyong Huang; Yintong Guo; Wuhao Guo; Wenjing Song; Junfeng Li
• Keywords: Thermal shock

Abstract The scale of propagation hydraulic fractures in deep shale is closely related to the effect stimulation. In general, most common means revealing fracture rules are laboratory physical simulation experiments and numerical simulation. However, former difficult meet real reservoir environment, latter research focuses mostly on fracturing technology interaction mechanism between natural fractures, both which do not consider influence temperature propagation. this paper, process divided into two stages (thermal shock propagation). Based cohesive zone method, a coupled method for sequential proposed. effects different temperatures, thermal rates, times analyzed. As well as horizontal stress difference pumping displacement rule fractures. results show that determine size density surrounding rock borehole, number increases by 96.5% with increase difference. Thermal dominate initiation direction path main width can be increased 150% length 46.3% increasing displacement; secondary 148.7% times. This study provide some inspiration development improving complexity