深圳大学学报（理工版）2025，Vol.42Issue(1)：50-58,9.DOI:10.3724/SP.J.1249.2025.01050
多级燃爆压裂及复合压裂数值模拟
Numerical simulation of multistage deflagration fracturing and composite fracturing
摘要
Abstract
To improve the efficiency of shale gas development,we conduct a study on fracture propagation during deflagration fracturing in shale gas reservoirs.Using the continuous-discontinuous method,we develop a deflagration fracture propagation model by integrating the fracture seepage model and the explosion source model.An evaluation system of deflagration fracturing performance is constructed with fracture range and fracture degree as evaluation indexes.Based on the established deflagration fracture propagation model,the single and multiple deflagration fracture propagation simulations are carried out,and the transformation effect under the combined fracturing is explored.The results indicate that deflagration fracturing can break through the stress concentration at the bottom of the well,forming initial radial fractures along the well circumference under the action of stress impact,followed by a significant increase in fracture length under the drive of high-pressure explosive gas.Compared with the single stage pulse,the fracture degree and fracture range under multistage blasting pulse(tertiary)are greatly improved,i.e.,the fracture degree is increased by 14.5%,and the fracture length is increased over 10.7%.Multiple fractures can be formed when the in-situ stress difference is 10 MPa by the composite fracturing process.The results can provide guidance for the development of shale gas reservoirs.关键词
油气田开发/页岩气/燃爆压裂/复合压裂/连续-非连续方法/数值模拟Key words
oil and gas field development/shale gas/deflagration fracturing/composite fracturing/continuous-discontinuous method/numerical simulation分类
能源科技引用本文复制引用
郭天魁,王旭东,曲占庆,王继伟,丁志睿,杨珂笼,马贵颖..多级燃爆压裂及复合压裂数值模拟[J].深圳大学学报（理工版）,2025,42(1):50-58,9.基金项目
National Key R&D Program of China(2020YFA0711800) 国家重点研发计划资助项目(2020YFA0711800) （2020YFA0711800）
