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| 论文编号: |
122214O120120341 |
| 第一作者所在部门: |
904组 |
| 中文论文题目: |
Correlation between gas permeability and pore structure of coal matrix
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| 英文论文题目: |
Correlation between gas permeability and pore structure of coal matrix
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| 论文题目英文: |
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| 作者: |
张俊
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| 论文出处: |
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| 刊物名称: |
EGU General Assembly 2012
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| 年: |
2012
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| 卷: |
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| 期: |
14 |
| 页: |
7620-7620 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
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| 摘要: |
The sequestration of CO2 in unminable coal seams represents a promising option for CO2 geologic storage, because the injected CO2 may enhance coalbed methane recovery (CO2-ECBM), which could partly offset the costs of the storage process. The CO2-ECBM technology is based on the relative af？nity of CO2 and CH4 to coals under given pressure and temperature conditions. The excess sorption capacity of coals for CO2 is generally higher than the sorption capacity for methane. The coal seams are characterized by a dual porosity structure including cleat and matrix pores. The cleats in the coal seams are considered as highways for gas and water ？ow, while the matrix is the storage location of gas by adsorption. The slow transport process of gas in coal matrix may constrain the ef？ciency of the displacement of CH4 by CO2 due to the compacted pore structure of the coal matrix. Therefore, a detailed understanding of the correlation between permeability of gas and pore structure in coal matrix is crucial for the CO2-ECBM processes. |
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