压裂液黏度和注液速率对含层理页岩水力裂缝扩展行为的影响规律研究  

Study on the influence law of fracturing fluid viscosity and liquid injection rate on propagation behavior of hydraulic fractures in laminated shale

作　　者：白岳松[1] 胡耀青[1] 李杰 BAI Yuesong;HU Yaoqing;LI Jie(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;National Key Lab of Mine Safety Technology,Fushun 113122,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2023年第12期18-24,共7页Safety in Coal Mines

摘　　要：为了研究压裂液黏度和注液速率等施工参数对含层理页岩水力压裂过程中其水力裂缝扩展行为的影响规律,首先采用数值模拟的研究方法,借助块体离散元法建立相关水力裂缝扩展模型,并对其模拟结果进行验证;在数值模型基础上,通过设置不同施工参数来进行模拟研究。研究发现:较低的压裂液黏度和注液速率时,所形成的水力裂缝内压力较低且分布均匀,水力裂缝更倾向于转向沿层理面扩展;而较高的压裂液黏度和注液速率时,裂缝内压力较高且分布差异大,此时水力裂缝更趋向于穿过层理面竖向扩展。In order to study the influence law of fracturing fluid viscosity and liquid injection rate and other construction parameters on the hydraulic fracture propagation behavior in the process of hydraulic fracturing of laminated shale,firstly,the numerical simulation method is used to establish the relevant hydraulic fracture propagation model with the help of block discrete element method,and the simulation results are verified.Secondly,on the basis of the numerical model,the simulation study was carried out by setting different construction parameters.The study found that when the fracturing fluid viscosity and liquid injection rate are low,the pressure in the hydraulic fractures formed was low and evenly distributed,and the hydraulic fractures tend to spread along the bedding plane;when the fracturing fluid viscosity and liquid injection rate are high,the pressure in the fracture is high and the distribution difference is large.At this time,the hydraulic fracture tends to expand vertically through the bedding plane.

关 键 词：压裂液黏度 注液速率 含层理页岩 水力压裂 裂缝扩展 

分 类 号：TD712[矿业工程—矿井通风与安全]