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Gas Multiple Flow Mechanisms and Apparent Permeability Evaluation in Shale Reservoirs

文献类型：期刊论文

作者Feng, Xuelei1,2,3; Ma, Fengshan1,2; Zhao, Haijun1,2; Liu, Gang1,2,3; Guo, Jie1,2
刊名SUSTAINABILITY
出版日期2019-04-01
卷号11期号:7页码:21
关键词shale gas multiple flow mechanisms apparent permeability model dynamic permeability evaluation numerical simulation
ISSN号2071-1050
DOI10.3390/su11072114
英文摘要Gas flow mechanisms and apparent permeability are important factors for predicating gas production in shale reservoirs. In this study, an apparent permeability model for describing gas multiple flow mechanisms in nanopores is developed and incorporated into the COMSOL solver. In addition, a dynamic permeability equation is proposed to analyze the effects of matrix shrinkage and stress sensitivity. The results indicate that pore size enlargement increases gas seepage capacity of a shale reservoir. Compared to conventional reservoirs, the ratio of apparent permeability to Darcy permeability is higher by about 1-2 orders of magnitude in small pores (1-10 nm) and at low pressures (0-5 MPa) due to multiple flow mechanisms. Flow mechanisms mainly include surface diffusion, Knudsen diffusion, and skip flow. Its weight is affected by pore size, reservoir pressure, and temperature, especially pore size ranging from 1 nm to 5 nm and reservoir pressures below 5 MPa. The combined effects of matrix shrinkage and stress sensitivity induce nanopores closure. Therefore, permeability declines about 1 order of magnitude compare to initial apparent permeability. The results also show that permeability should be adjusted during gas production to ensure a better accuracy.
WOS关键词SURFACE-DIFFUSION ; NANOPORES ; TRANSPORT ; MODEL ; ADSORPTION ; METHANE ; PIPES
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB10030602] ; Natural Science Foundation of China[41372325]
WOS研究方向Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000466551600291
出版者MDPI
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/92103]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Ma, Fengshan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Xuelei,Ma, Fengshan,Zhao, Haijun,et al. Gas Multiple Flow Mechanisms and Apparent Permeability Evaluation in Shale Reservoirs[J]. SUSTAINABILITY,2019,11(7):21.
APA Feng, Xuelei,Ma, Fengshan,Zhao, Haijun,Liu, Gang,&Guo, Jie.(2019).Gas Multiple Flow Mechanisms and Apparent Permeability Evaluation in Shale Reservoirs.SUSTAINABILITY,11(7),21.
MLA Feng, Xuelei,et al."Gas Multiple Flow Mechanisms and Apparent Permeability Evaluation in Shale Reservoirs".SUSTAINABILITY 11.7(2019):21.

入库方式： OAI收割

来源：地质与地球物理研究所

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