| 水力压裂扩展的流固耦合数值模拟研究 |
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| 引用本文： | 连志龙,张劲,吴恒安,王秀喜,薛炳. 水力压裂扩展的流固耦合数值模拟研究[J]. 岩土力学, 2008, 29(11): 3021-3026 |
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| 作者姓名： | 连志龙 张劲 吴恒安 王秀喜 薛炳 |
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| 作者单位： | 1. 中国科学技术大学 力学与机械工程系/中科院材料力学行为和设计重点实验室，合肥 230027； 2. 中国石油集团钻井工程技术研究院 钻井工艺研究所，北京 100195 3. 中国石油大学 石油与天然气工程学院，北京 102249 |
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| 摘 要： | 以临界应力作为裂纹扩展准则并采用流固耦合模型模拟了水力压裂扩展问题，推导出裂缝面内的压降方程表达式，并编写出用户子程序嵌入到ABAQUS中。建立的计算模型能够模拟地应力、岩石力学特性、压裂液流体特性等各种复杂因素对水力压裂扩展的影响。通过计算分析得到一些有益结论，采用有限元软件ABAQUS求解可渗透油藏水力压裂扩展过程问题是可行的；提出了临界宽度的概念，它可以作为判断裂缝是作为起渗透作用的孔隙通道还是作为起导流作用的裂缝的依据；其结论对于压裂作业优化具有参考价值。
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| 关 键 词： | 水力压裂 流固耦合 射孔 数值模拟 有限元 |
| 收稿时间： | 2006-11-06 |
A simulation study of hydraulic fracturing propagation with a solid-fluid coupling model |
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| LIAN Zhi-long,ZHANG Jing,WU Heng-an,WANG Xiu-xi,XUE Bin. A simulation study of hydraulic fracturing propagation with a solid-fluid coupling model[J]. Rock and Soil Mechanics, 2008, 29(11): 3021-3026 |
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| Authors: | LIAN Zhi-long ZHANG Jing WU Heng-an WANG Xiu-xi XUE Bin |
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| Affiliation: | 1. CAS Key Laboratory of Materials Behavior and Design, Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230027, China; 2. CNPC Drilling Research Institute, Drilling Technology Institute, Beijing 100195, China; 3. College of Petroleum and Natural Gas Engineering, China University of Petroleum, Beijing 102249, China |
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| Abstract: | A model of coupling the stress equilibrium and fluid continuity equations is proposed and implemented to solve numerical simulation problem of the hydraulic fracturing propagations. The mechanism of critical stress criterion of crack propagation is also introduced. The pressure descent distribution function on the fracture face along the fracture length is deduced and the corresponding user subroutines are developed and also embedded into ABAQUS. The complex factors of geology such as in-situ stress distrib... |
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| Keywords: | hydraulic fracturing solid-fluid coupling perforation numerical simulation finite elements |
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