A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain
As an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is a key factor that controls CBM transport in coal. The slippage effect is an influential phenomenon that occurs during gas penetration pro...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/16/6036 |
| _version_ | 1797410509046153216 |
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| author | Man Wang Junpeng Zou |
| author_facet | Man Wang Junpeng Zou |
| author_sort | Man Wang |
| collection | DOAJ |
| description | As an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is a key factor that controls CBM transport in coal. The slippage effect is an influential phenomenon that occurs during gas penetration processes, especially in low-permeable media. Apparent permeability may differ greatly from intrinsic permeability due to gas slippage. However, the gas slippage effect has not been considered in most analytical permeability models. Based on the cubic law, a new analytical model suited for the permeability analysis of coal under different stress conditions is derived, taking into consideration gas slippage and matrix shrinkage/swelling due to gas desorption/adsorption. To enhance its application, the model is derived under constant hydrostatic stress and pore pressure. The new analytical model is then compared with the existing models, and its reliability is verified by the comparison between the analytical prediction and the experimental permeability data under different stress conditions. |
| first_indexed | 2024-03-09T04:30:03Z |
| format | Article |
| id | doaj.art-aaa62c6b1d97474bb245fabd8c3eca0b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T04:30:03Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-aaa62c6b1d97474bb245fabd8c3eca0b2023-12-03T13:36:25ZengMDPI AGEnergies1996-10732022-08-011516603610.3390/en15166036A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced StrainMan Wang0Junpeng Zou1College of Information Engineering, Wuhan Business University, Wuhan 430056, ChinaFaculty of Engineering, China University of Geosciences, Wuhan 430074, ChinaAs an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is a key factor that controls CBM transport in coal. The slippage effect is an influential phenomenon that occurs during gas penetration processes, especially in low-permeable media. Apparent permeability may differ greatly from intrinsic permeability due to gas slippage. However, the gas slippage effect has not been considered in most analytical permeability models. Based on the cubic law, a new analytical model suited for the permeability analysis of coal under different stress conditions is derived, taking into consideration gas slippage and matrix shrinkage/swelling due to gas desorption/adsorption. To enhance its application, the model is derived under constant hydrostatic stress and pore pressure. The new analytical model is then compared with the existing models, and its reliability is verified by the comparison between the analytical prediction and the experimental permeability data under different stress conditions.https://www.mdpi.com/1996-1073/15/16/6036permeabilitycoalgas desorption/adsorptiongas slippage effect |
| spellingShingle | Man Wang Junpeng Zou A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain Energies permeability coal gas desorption/adsorption gas slippage effect |
| title | A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain |
| title_full | A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain |
| title_fullStr | A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain |
| title_full_unstemmed | A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain |
| title_short | A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain |
| title_sort | novel permeability model of coal considering gas slippage and gas sorption induced strain |
| topic | permeability coal gas desorption/adsorption gas slippage effect |
| url | https://www.mdpi.com/1996-1073/15/16/6036 |
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