On gas transport modes in matrix-fracture systems with arbitrary multiscale configurations
文献类型：期刊论文
| 作者 | Zuo, Hong1,3,4; Javadpour, Farzam3; Zhai, Cheng2; Deng, Shouchun4; Li, Haibo4
|
| 刊名 | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 108期号:-页码:- |
| 关键词 | Homogenization method Multiscale flow Matrix -fracture systems Shale gas Non -equilibrium states |
| ISSN号 | 1875-5100 |
| 英文摘要 | Tight shale reservoirs exhibit high heterogeneity and strong anisotropy in multiscale pore/fracture networks, with highly variable properties. The local equilibrium or non-equilibrium states vary spatially and are strongly controlled by the gas transport modes at each scale. A fundamental understanding of the coupling effects of gas flow in heterogeneous porous media with arbitrary scale ratios is crucial but not yet available. Here, we systematically and theoretically study the gas transport modes and gas flow velocity in multiscale matrix-fracture systems using the asymptotic homogenization method. A series of exact scaling laws for the gas velocity in heterogeneous porous media with arbitrary multiscale configurations are established, and the local equilibrium/ non-equilibrium effects at each scale are analyzed in detail. It is shown that the gas transport modes between two adjacent porous media can be classified into four distinct types governed by two characteristic time scales (rather than two types as commonly reported). We demonstrate an ultrahigh pressure gradient in a thin depressurized zone in the matrix that can reach 103 similar to 105 times the macroscopic pressure gradient, greatly increasing gas flow rates by three to five orders of magnitude. The hydraulically-created fractures not only provide preferential flow pathways, but more importantly, they increase the gas velocity in the matrix (which does not contain any fractures) by several orders of magnitude. The work also sheds light on the discrepancy between the observed high gas production and the experimentally measured low permeability in drilled cores. |
| 学科主题 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000916935200001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35254]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, China 2.School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China 3.Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, University Station, Box X, Austin, TX, 78713-8924, USA 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China |
| 推荐引用方式 GB/T 7714 | Zuo, Hong,Javadpour, Farzam,Zhai, Cheng,et al. On gas transport modes in matrix-fracture systems with arbitrary multiscale configurations[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2022,108(-):-. |
| APA | Zuo, Hong,Javadpour, Farzam,Zhai, Cheng,Deng, Shouchun,&Li, Haibo.(2022).On gas transport modes in matrix-fracture systems with arbitrary multiscale configurations.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,108(-),-. |
| MLA | Zuo, Hong,et al."On gas transport modes in matrix-fracture systems with arbitrary multiscale configurations".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 108.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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