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IMECH-IR  > 流固耦合系统力学重点实验室(2012-)  > 期刊论文
Title:
A numerical approach for pressure transient analysis of a vertical well with complex fractures
Author: Wan, YiZhao(万义钊); Liu YW(刘曰武); Liu WC(刘文超); Han GF; Niu CC
Source: ACTA MECHANICA SINICA
Issued Date: 2016
Volume: 32, Issue:4, Pages:640-648
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
Language: 英语
Indexed Type: SCI ; EI ; CSCD
Corresponding Author: Liu, YW (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
Correspondent Email: liuyuewulxs@126.com
DOI: 10.1007/s10409-016-0568-0
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Engineering, Mechanical ; Mechanics
WOS Subject Extended: Engineering ; Mechanics
WOS Keyword Plus: Fractured well ; Discrete-fracture model ; Numerical well test ; Hybrid finite element method ; Complex fracture
WOS ID: WOS:000380665600007
ISSN: 0567-7718
Funder: 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).
Rank: [Wan, Yizhao; Liu, Yuewu; Liu, Wenchao; Han, Guofeng; Niu, Congcong] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
Department: LMFS水环境流体力学(LEM)
Classification: 二类
Ranking: True
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/59754
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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Recommended Citation:
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,2016-01-01,32(4):640-648.
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