文献类型：期刊文献

英文题名：A numerical method for simulating fluid flow through 3-D fracture networks

作者：Huang, Na[1,2,3];Jiang, Yujing[1,2,3];Li, Bo[4];Liu, Richeng[1,5]

机构：[1]Nagasaki Univ, Sch Engn, 1-14 Bunkyo Machi, Nagasaki 8528521, Japan;[2]Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China;[3]Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China;[4]Shaoxing Univ, Rock Mech & Geohazards Ctr, Shaoxing 312000, Peoples R China;[5]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China

年份：2016

卷号：33

起止页码：1271

外文期刊名：JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000381594000111)、、EI(收录号：20164102897269)、Scopus(收录号：2-s2.0-84990199019)、WOS

基金：This study has been partially funded by National Natural Science Foundation of China (Grant No. 51379117) and China Scholarship Council (CSC NO. 201408370092). These supports are gratefully acknowledged.

语种：英文

外文关键词：Discrete fracture network; Flow simulation; Galerkin method; Permeability

外文摘要：Hydraulic property of fractured rock masses is commonly undertaken based on 2-D fracture network models, which are cut planes of the real 3-D models. This simplification would lead to a significant underestimation of fracture network permeability. In this study, a numerical procedure is originally developed to address flow problem through 3-D discrete fracture network (DFN) models. In this method, fractures are modeled as circular discs with arbitrary size, orientation and location. Fracture networks are established with fractures following well-known statistical distributions, after which the networks are triangulated and fluid flow is calculated by solving the Reynolds equation using Galerkin method. The results show that the permeability of 2-D DFN models that are cut from an original 3-D DFN model would be underestimated by 19.2 similar to 43.6%, comparing with that of the 3-D DFN model. For networks that are consisted of power-law size-distributed fractures, the equivalent permeability would decrease exponentially with the increasing length distribution exponent. This tendency can be interpreted by incorporating the average intersection length, which is a parameter that can reflect the connectivity of a fracture network. When the heterogeneity of fracture aperture distribution is considered, some tortuous flow paths are formatted in 3-D fracture networks. The rougher fracture surface, the stronger anisotropy of aperture distribution, and thereby resulting in the larger reduction of the network permeability. (C) 2016 Elsevier B.V. All rights reserved.