| 基于近场动力学方法的水力压裂过程数值模拟 |
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| 引用本文： | 吴凡,李书卉,段庆林,李锡夔,张洪武.基于近场动力学方法的水力压裂过程数值模拟[J].计算机辅助工程,2017,26(1):1-6. |
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| 作者姓名： | 吴凡 李书卉 段庆林 李锡夔 张洪武 |
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| 作者单位： | 大连理工大学 工业装备结构分析国家重点实验室;大连理工大学 工业装备结构分析国家重点实验室;大连理工大学 工业装备结构分析国家重点实验室;大连理工大学 工业装备结构分析国家重点实验室;大连理工大学 工业装备结构分析国家重点实验室 |
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| 基金项目： | 国家自然科学基金(11232003,11372066)；中央高校基本科研业务费专项资金(DUT15LK07)；辽宁省教育厅重点实验室基础研究项目(LZ2014002) |
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| 摘 要： | 利用近场动力学方法便于处理多裂纹萌生、扩展和分叉的优点，将其应用于页岩水力压裂过程的数值模拟.结合页岩水力压裂机理提出在近场动力学中由破坏度跟踪裂纹扩展路径，并通过在新生成裂纹面法线方向施加水压载荷的裂纹追踪方法，成功模拟单射孔横剖面开裂水压实验以及单射孔和多射孔水平井纵剖面的水力压裂过程，得到压裂导致的裂纹缝网结构.数值结果还表明初始射孔裂纹会显著影响后续的水力压裂过程.
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| 关 键 词： | 页岩气开采 水力压裂 近场动力学 裂纹扩展 多裂纹 裂纹追踪 |
| 收稿时间： | 2016/9/27 0:00:00 |
| 修稿时间： | 2016/11/23 0:00:00 |
Numerical simulation of hydraulic fracturing process based on peridynamics method |
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| WU Fan,LI Shuhui,DUAN Qinglin,LI Xikui and ZHANG Hongwu.Numerical simulation of hydraulic fracturing process based on peridynamics method[J].Computer Aided Engineering,2017,26(1):1-6. |
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| Authors: | WU Fan LI Shuhui DUAN Qinglin LI Xikui and ZHANG Hongwu |
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| Affiliation: | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology |
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| Abstract: | Due to the advantages of peridynamics method in dealing with the initiation, propagation and branching of multiple cracks, it is introduced into the numerical simulation on the hydraulic facture process of shale. Combining with the hydraulic fracture mechanism, a method for tracing crack path according to damage degree in peridynamics is proposed in which the hydraulic pressure is applied in the normal direction of the newly generated crack surface. The cracking pressure of single horizontal well in cross section and the hydraulic fracture of the horizontal well with single and multiple perforations in longitudinal section are successfully simulated by the method. The crack net due to fracturing is obtained. The numerical results also show that the initial perforations have significant effect in the subsequent hydraulic fracture process. |
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| Keywords: | shale gas extraction hydraulic fracture peridynamics crack propagation multiple cracks crack tracking |
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