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| 论文编号: |
122214O120120340 |
| 第一作者所在部门: |
904组 |
| 中文论文题目: |
Influence of temperature and moisture on gas permeability of matrix coal
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| 英文论文题目: |
Influence of temperature and moisture on gas permeability of matrix coal
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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: |
The 29th Annual International Pittsburgh Coal Conferenc Abstracts Booklet
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| 年: |
2012
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| 卷: |
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| 期: |
1 |
| 页: |
59-59 |
| 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 carbon dioxide (CO2) in unminable coal seams represents an option for long-term CO2 geological storage to mitigate climate change. The injected CO2 may enhance coalbed methane (CBM) recovery, which may partly offset the costs of the storage process. In short, this process is referred to as CO2-ECBM. The CO2-ECBM technology is based on the relative affinity of CO2 and CH4 to coals under given pressure and temperature conditions. CO2-ECBM is not yet a mature technology, in spite of the growing number of pilot and field tests worldwide show its technical feasibility. There is a lack of knowledge on the mechanism of the CO2-ECBM process due to the complexity of the coal seam structure and the mixed fluid transport processes. The coal seams are characterized by a dual porosity structure including cleat and matrix pores. The transport process of gas and water in the cleats can be described as pressure-driven laminar flow and obeys Darcy’s law while the flow of gas and water in the matrix may be considered as diffusive or a combination of diffusion and viscous flow. Darcy flow through face and butt cleats in coal seams is relatively fast and the primary role in the CBM/ECBM process, whose mechanism is well established. Transport within the coal matrix, which serves as the storage location of gas by adsorption, however, an important and rate-determining process in CBM/ECBM that is still poorly understood. This study is aimed to investigate the characteristics of the fluid flow in the coal matrix. An attempt will be made to establish the relationship between temperature, moisture, and permeability. |
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