基于微震监测的定向钻孔水力裂缝三维扩展规律分析  

Analysis of Three-dimensional Propagation Law of Hydraulic Fractures in Directional Borehole Based on Microseismic Monitoring

作　　者：李明轩 李庆锋 戴超 刘永强 LI Mingxuan;LI Qingfeng;DAI Chao;LIU Yongqiang(CCTEG Coal Mining Research Institute,Beijing 100013,China;CCTEG Mining Engineering Technology Co.,Ltd.,Xi′an 710000,China;Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;Shaanxi Future Energy and Chemicals Co.,Ltd.,Yulin 719000,China)

机构地区：[1]中煤科工开采研究院有限公司,北京100013 [2]中煤科工开采工程技术有限公司,西安710000 [3]天地科技股份有限公司,北京100013 [4]陕西未来能源化工有限公司,陕西榆林719000

出　　处：《煤炭技术》2025年第2期57-61,共5页Coal Technology

摘　　要：为探明坚硬顶板内定向水平长钻孔水力裂缝扩展规律,建立了三维裂缝扩展模型,分析了裂缝扩展半径,并通过在水平定向孔周围安装微震监测探头,收集压裂期间有效微震事件发生时间,确定微震震源三维坐标,以分析水力裂缝在坚硬砂岩顶板内的扩展范围、形态及扩展速度。根据某矿6207工作面坚硬顶板1#、2#定向水平长钻孔压裂期间微震监测分析可知,水力裂缝在空间呈发散状扩展延伸,裂缝在垂直方向上的扩展范围大于水平方向,裂缝扩展速度随压裂时长减小。研究结论可为煤矿坚硬顶板区域压裂施工提供参考。In order to find out the hydraulic fracture propagation law of directional horizontal long borehole in the hard roof,a three-dimensional crack propagation model was established,the fracture propagation radius was analyzed,and the effective microseismic event occurrence time during fracturing was collected by installing microseismic monitoring probes around the horizontal directional hole,and the three-dimensional coordinates of the microseismic source were determined,so as to analyze the expansion range,morphology and propagation speed of the hydraulic fracture in the hard sandstone roof.According to the microseismic monitoring and analysis during the fracturing of the No.1 and No.2 directional horizontal long boreholes of the hard roof of the 6207 working face of a mine,it can be seen that the hydraulic fractures expand and extend in a divergent manner in space,and the expansion range of the fractures in the vertical direction is greater than that in the horizontal direction,and the fracture expansion speed decreases with the fracturing time.The research conclusions can provide a reference for the fracturing construction of hard roof area in coal mines.

关 键 词：定向钻孔 水力压裂 水力裂缝 微震监测 

分 类 号：TD327[矿业工程—矿井建设]