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A Unified Multiple Transport Mechanism Model for Gas through Shale Pores
Joint Authors
Ren, Wenxi
Zeng, Fanhui
Jiang, Qifeng
Xiang, Jianhua
Zhang, Yu
Zhang, Tao
Guo, Jianchun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-17
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
Predicting apparent gas permeability (AGP) in nanopores is a major challenge for shale gas development.
Considering the differences in the gas molecule-pore wall interactions in inorganic and organic nanopores, the gas transport mechanisms in shale remain unclear.
In this paper, gas flow channels in shale, which are separated into inorganic pores and organic pores, are treated as nanotubes.
Inorganic pores are assumed to be hydrophilic, and organic pores are assumed to be hydrophobic.
In organic pores, multiple bulk free gas and surface adsorbed gas transport mechanisms are incorporated, while the bulk gas and water film are considered within inorganic pores.
This paper presents a unified multiple transport mechanism model for both organic nanopores and inorganic nanopores.
Unlike the earlier models, the presented models consider the absorption, stress dependence, real gas, and water storage effects on gas transport comprehensively for the entire flow regime.
The results are validated with published data which is more in line with the real situation.
The results show that (1) the AGP decreases gradually as the pore pressure decreases but that the decrease is sharp in small pores, (2) the AGP decreases dramatically when considering the real gas effect at 50 MPa in a 2 nm pore size, and (3) for a small pore size at the critical high-water saturation, AGP might increase suddenly as the flow regime changes from continuum flow to slip flow.
The findings of this study can help for better understanding of the gas transport mechanisms for the entire flow regime in shale.
American Psychological Association (APA)
Zeng, Fanhui& Zhang, Yu& Guo, Jianchun& Ren, Wenxi& Zhang, Tao& Jiang, Qifeng…[et al.]. 2020. A Unified Multiple Transport Mechanism Model for Gas through Shale Pores. Geofluids،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1159394
Modern Language Association (MLA)
Zeng, Fanhui…[et al.]. A Unified Multiple Transport Mechanism Model for Gas through Shale Pores. Geofluids No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1159394
American Medical Association (AMA)
Zeng, Fanhui& Zhang, Yu& Guo, Jianchun& Ren, Wenxi& Zhang, Tao& Jiang, Qifeng…[et al.]. A Unified Multiple Transport Mechanism Model for Gas through Shale Pores. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1159394
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1159394