Mechanism of hydrofracture propagation control by non-uniform pore pressure field

被引：0
|
作者：
Lu Y.-Y. [1 ,2 ]
Jia Y.-Z. [1 ,3 ]
Tang J.-R. [1 ,2 ]
Song C.-P. [1 ,2 ]
机构：
[1] State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing
[2] National & Local Joint Engineering Laboratory of Gas Drainage in Complex Coal Seam, Chongqing University, Chongqing
[3] Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center, The Pennsylvania State University, University Park, 16802, PA
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2016年 / 37卷 / 07期
关键词：
Fracture propagation control; Hydrofracture; Non-uniform pore pressure field; RFPA[!sup]2D[!/sup]-Flow; Stress intensity factor;
D O I：
10.3969/j.issn.1005-3026.2016.07.025
中图分类号：
学科分类号：
摘要：
To reveal the effect of non-uniform pressure on hydraulic fractures propagation, the porous elasticity mechanics, fracture mechanics, seepage mechanics and thermal elasticity mechanics were used to build a hydrofracture crack tip stress intensity factor calculation model considering the pore pressure. Then, through laboratory experiments and numerical simulation, the guiding mechanism of pore pressure on hydrofracture was verified. The research results showed that pore pressure can increase the crack tip stress intensity factor of hydrofracture, which causes the fractures extend to the high pore pressure region; at the same time, stress intensity factor of hydrofracture will be enlarged with the increase of pore pressure. A larger pore pressure will lead to larger deflection amplitude of fractures. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：1028 / 1033
页数：5
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