| A numerical approach for pressure transient analysis of a vertical well with complex fractures | |
Wan YZ ; Liu YW(刘曰武); Liu WC(刘文超); Han GF; Niu CC; Liu, YW (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
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| Source Publication | ACTA MECHANICA SINICA
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| 2016 | |
| Volume | 32Issue:4Pages:640-648 |
| ISSN | 0567-7718 |
| Abstract | A new well test model for a vertical fractured well is developed based on a discrete-fracture model in which the fractures are discretized as one dimensional (1-D) entities. The model overcomes the weakness of complex meshing, a large number of grids, and instability in conventional stripe-fracture models. Then, the discrete-fracture model is implemented using a hybrid element finite-element method. Triangular elements are used for matrix and line elements for the fractures. The finite element formulation is validated by comparing with the semi-analytical solution of a single vertical fractured well. The accuracy of the approach is shown through several examples with different fracture apertures, fracture conductivity, and fracture amount. Results from the discrete-fracture model agree reasonably well with the stripe-fracture model and the analytic solutions. The advantages of the discrete-fracture model are presented in mesh generation, computational improvement, and abilities to handle complex fractures like wedge-shaped fractures and fractures with branches. Analytical results show that the number of grids in the discrete-fracture model is 10 % less than stripe-fracture model, and computational efficiency increases by about 50 %. The more fractures there are, the more the computational efficiency increases. |
| Keyword | Fractured Well Discrete-fracture Model Numerical Well Test Hybrid Finite Element Method Complex Fracture |
| DOI | 10.1007/s10409-016-0568-0 |
| URL | 查看原文 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000380665600007 |
| WOS Keyword | Fractured well ; Discrete-fracture model ; Numerical well test ; Hybrid finite element method ; Complex fracture |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Organization | This work was supported by the National Natural Science Foundation of China (Grant 51404232), the National Science and Technology Major Project (Grant 2011ZX05038003), and the China Postdoctoral Science Foundation (Grant 2014M561074). |
| Department | LMFS水环境流体力学(LEM) |
| Classification | 二类 |
| Ranking | True |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/59754 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Liu, YW (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Wan YZ,Liu YW,Liu WC,et al. A numerical approach for pressure transient analysis of a vertical well with complex fractures[J]. ACTA MECHANICA SINICA,2016,32,4,:640-648. |
| APA | Wan YZ,刘曰武,刘文超,Han GF,Niu CC,&Liu, YW .(2016).A numerical approach for pressure transient analysis of a vertical well with complex fractures.ACTA MECHANICA SINICA,32(4),640-648. |
| MLA | Wan YZ,et al."A numerical approach for pressure transient analysis of a vertical well with complex fractures".ACTA MECHANICA SINICA 32.4(2016):640-648. |
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| a2016-017.pdf（2555KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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