摘要
压裂起始过程中射孔孔眼处会出现多条裂缝,这些裂缝的延伸、连接情况复杂,对它们的研究有利于对射孔、压裂参数的优化。文章采用简化的裂缝模型,应用复变函数与位错理论确定了裂缝的应力场分布表达,通过S ih方法及坐标变换求解裂缝应力强度因子分布及其影响因素,最后使用算例验证分析了解析结果。
Several fractures may occur at perforation tunnel from an initial fracturing.The fractures extension and connection are complex.So,a study on them is favorable for optimizing the perforation and fracturing parameters.In this paper,a simplified fracture model is used to determine the expression of fracture stress field distribution by applying complex function and dislocation theory.Stress strength factor distribution for fracture and its affecting factors are obtained by Sih′s method and coordinate transformation.Finally,the analytical results are validated by example.
出处
《天然气勘探与开发》
2008年第4期37-40,44,共5页
Natural Gas Exploration and Development
关键词
压裂井
应力强度因子
多裂缝
干扰
fractured well,stress strength factor,multiple fracture,interference
