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| Study on the law of transverse isotropic reservoir crack extension during hydraulic fracture |
| Received:May 15, 2015 Revised:September 24, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201605017 |
| KeyWord:hydraulic fracturing crack criterion crack extension XFEM transverse isotropic |
| Author | Institution |
| 孙可明 |
辽宁工程技术大学 力学与工程学院, 阜新 |
| 张树翠 |
辽宁工程技术大学 力学与工程学院, 阜新 |
| 李天舒 |
辽宁工程技术大学 力学与工程学院, 阜新 |
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| Abstract: |
| With the difference between transverse isotropic and isotropic reservoir during hydraulic fracture,mechanical model was established based on the extended finite element method.Crack criterions were developed by subroutine in ABAQUS.The law of transverse isotropic reservoir crack propagation was studied on the base of which numerical simulation results coincided well with analytical solution results and the field measured curve with isotropic material.It had drawn some conclusions.The crack propagation direction is codetermined by in-situ stress,bedding direction,rock and interface tensile strength.Injection pressure produces stress concentration at the crack tip during hydraulic fracturing.Crack extends along the bedding when the stress component normal to interface reaches the interface tensile strength first whereas crack extend vertical to minimum in-situ stress.Crack propagation rate decreased with increasing of bedding tensile strength.With fracturing fluid injection,the crack length and width growth decrease due to the leak-off of formation. |