页岩气水平井压裂分段分簇综合优化方法

为进一步提高页岩气水平井分段压裂的有效性，对水平井综合分段布缝及射孔分簇方法进行了优化。基于数值模拟和压裂模拟，兼顾实际裂缝形态和多裂缝参数的彼此影响，提出了分段参数优化正交设计方法；在确定分段数的基础上，从产能最大化角度提出了“W”型分段压裂布缝模式；根据多簇裂缝之间应力干扰及诱导应力分布特征，建立了较为合理的分簇优化方法；考虑页岩气水平井实际穿行轨迹的地质属性和工程特征，形成了地质分大段、工程分小段的分段分簇综合优化设计方法。

Method for Fracturing Stage and Cluster Optimization in Shale Gas Horizontal Well

To further improve the effectiveness of staged fracturing design for shale gas horizontal well, a comprehensive fracturing stage and cluster optimization method was studied. Based on the results of numerical simulation and fracturing simulation, considering the effect of actual fracture geometry and multi?fracture parameters, this paper presents an orthogonal design method for sectional parameters optimization; after that, it proposes a W?type staged fracturing model for obtaining maximum productivity; according to multiple cluster?fracture stress interference and induced stress distribution, it establishes a more reasonable clustering optimization method; considering the geologic attributes and engineering features in real trajectory of shale gas horizontal well, it provides a comprehensive optimization method of fracturing stage and cluster in terms of geologic long segment and engineering short segment