Experimental study of impact of crustal stress on fracture pressure and hydraulic fracture

MA Geng; ZHANG Fan; LIU Xiao; FENG Dan; ZHANG Peng-wei

doi:10.16285/j.rsm.2016.S2.026

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Experimental study of impact of crustal stress on fracture pressure and hydraulic fracture

更新时间：2026-06-25

- Experimental study of impact of crustal stress on fracture pressure and hydraulic fracture
- Vol. 37, Issue S2, Pages: 216-222(2016)
- 作者机构：
  
  1. 河南理工大学能源科学与工程学院,河南,焦作,454003
  2. 河南能源化工集团研究院有限公司,河南,郑州,450046
  3. 中原经济区煤层（页岩）气河南省协同创新中心,河南,焦作,454003
  4. 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.S2.026
  CLC： TD813
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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MA Geng, ZHANG Fan, LIU Xiao, et al. Experimental study of impact of crustal stress on fracture pressure and hydraulic fracture[J]. 2016, 37(S2): 216-222.
DOI：

MA Geng, ZHANG Fan, LIU Xiao, et al. Experimental study of impact of crustal stress on fracture pressure and hydraulic fracture[J]. 2016, 37(S2): 216-222. DOI： 10.16285/j.rsm.2016.S2.026.

摘要

为研究水力压裂时地应力对破裂压力和水力裂缝的影响规律，采用水力压裂试验系统，以相似材料作为研究对象，进行了水力压裂物理模拟试验，并借助煤岩断面三维扫描系统、位移计提取了水力裂缝信息。试验结果表明，随着主应力差的增大，破裂压力逐渐降低，破裂时间也逐渐缩短；随着主应力差的增大，破裂面的表面积逐渐增加，破裂面变得逐渐粗糙；围压相近时水力裂缝易出现转向、分叉，压裂液的动力效应越明显；水力裂缝张开度随着主应力差的增大而逐渐减小。研究结果可为水力压裂试验的进一步研究、裂缝网络系统的建立提供参考。

Abstract

In order to study the influence law of crustal stress on the fracture pressure and hydraulic fracture during hydraulic fracturing

the physical simulation experiment which used similar materials and hydraulic fracturing experiment system is conducted; and then the information of hydraulic fracture is extracted with the help of 3D scanning device for coal rock section and displacement meter. The research results show that with the principal stress difference increases

the fracture pressure decreases gradually; the break-up time becomes shorter progressively; the superficial area of fracture surface becomes larger with the principal stress difference increases; the fracture surface also turns into rough increasingly; the fracture is easier to appear steering

bifurcation when confining pressure is close

the dynamic effects of fracturing fluid is more obvious; the fracture opening decreases with the principal stress difference increasing. The research results can provide reference and data support for the further study of hydraulic fracturing experiment and building the fracture network system.

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