坚硬顶板定向水力压裂技术合理参数研究  

Study on reasonable parameter of directional hydraulic fracturing technology for hard roof

作　　者：鲁健 王恒 LU Jian;WANG Heng(Yujialiang Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719315,China)

机构地区：[1]国能神东煤炭集团有限责任公司榆家梁煤矿,陕西省榆林市719315

出　　处：《中国煤炭》2023年第S02期288-291,共4页China Coal

摘　　要：为了解决坚硬顶板难垮问题,利用Comsol数值模拟软件对定向水力压裂不同参数对压裂效果的影响进行了分析研究。研究发现定向钻孔压裂裂缝扩展大致呈现S型对称的趋势,最大应力峰值为11.5 MPa。同时随着压裂液黏度的不断增加,裂缝的张开度及裂缝内部流速呈现逐步增大的趋势,但增大的趋势逐步减弱,研究可为后续水力压裂施工参数的设定提供一定的参考。In order to solve the difficult problem of hard roof caving,the Comsol numerical simulation software was used to analyze and study the influence of different parameters of directional hydraulic fracturing on the fracturing effect.Research has found that the expansion of directional drilling and fracturing fractures exhibits a roughly S-shaped symmetrical trend,with a maximum stress peak of 11.5 MPa.At the same time,with the continuous increase of viscosity of fracturing fluid,the opening degree of cracks and the internal flow velocity of cracks show a gradually increasing trend,but the increasing trend gradually weakens.The research results can provide a certain reference for the setting of hydraulic fracturing construction parameters in the future.

关 键 词：定向水力压裂 数值模拟 张开度 注液压力 

分 类 号：TD327.23[矿业工程—矿井建设]