不同压裂参数下水力压裂效果分析  

Analysis of Hydraulic Fracturing Effect under Different Fracturing Parameters

作　　者：茹卓伟 Ru Zhuowei(Zhangzi County Lingzhida Coal Industry Co.,Ltd.,Changzhi Shanxi 046000,China)

机构地区：[1]山西省长治市长子县凌志达煤业有限公司,山西长治046000

出　　处：《山西冶金》2023年第8期133-134,158,共3页Shanxi Metallurgy

摘　　要：为提升水力压裂在坚硬顶板问题治理过程中的应用效果,利用数值模拟软件对不同压裂参数下的裂缝扩展情况进行研究。对水力压裂过程进行模拟,发现随着注浆压力的增大,在预制裂缝角位置出现应力集中,当应力值超过单元的抗拉强度时裂缝起裂,并向着最大主应力方向偏转扩展;对不同应力差及压裂液黏度下的裂缝宽度及压裂液流速进行分析,发现裂缝宽度及液体流速随着应力差的增大均呈现逐步减小的趋势,而裂缝宽度及液体流速随着压裂液黏度的增大均呈增大趋势。此研究结果为水力压裂技术应用、参数设计提供了一定的参考。In order to improve the application effect of hydraulic fracturing in the treatment of hard roof problems,this paper uses numerical simulation software to study the fracture propagation under different fracturing parameters.First,the hydraulic fracturing process is simulated,and it is found that with the increase of grouting pressure,the stress concentration at the prefabricated fracture angle is at this time.When the stress value exceeds the tensile strength of the unit,the fracture starts to crack and deflects to the direction of the maximum principal stress.At the same time,the fracture width and fracturing fluid flow rate under different stress difference and fracturing fluid viscosity are analyzed,and it is found that the fracture width and fluid flow rate are gradually decreasing with the increase of stress difference,while the fracture width and fluid flow rate are gradually increasing with the increase of fracturing fluid viscosity,which provides a certain reference for the application of hydraulic fracturing technology and parameter design.

关 键 词：数值模拟 压裂液黏度 起裂压力 裂缝宽度 

分 类 号：TD353[矿业工程—矿井建设]