The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China
The origin of the high content of wet gases in coalbed seams is very important geologically, especially in the Enhong syncline in China. The present study focuses on the role of the material that generates the hydrocarbons. The effect of the pore structure on the generation of wet gases has not been...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/1/432 |
| _version_ | 1827760757960343552 |
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| author | Fengjuan Lan Yong Qin Ming Li Yugan Wang Yuhang Liu |
| author_facet | Fengjuan Lan Yong Qin Ming Li Yugan Wang Yuhang Liu |
| author_sort | Fengjuan Lan |
| collection | DOAJ |
| description | The origin of the high content of wet gases in coalbed seams is very important geologically, especially in the Enhong syncline in China. The present study focuses on the role of the material that generates the hydrocarbons. The effect of the pore structure on the generation of wet gases has not been thoroughly examined. The present paper characterizes the coal pore structure in the “wet gas area” and “dry gas area”. The pore structures in the two areas are shown to have different features, which affect the distribution of the wet gases. With respect to the pore structure parameters, coals in the wet gas area have a greater total specific surface area and pore volume in micropores. The pore structure types also differ between the two areas: the pore structures in the dry gas areas are mainly of the parallel type and reverse S type, which is favorable for the migration and dissipation of coalbed gases. The pore structure in the wet gas area is relatively closed, with poor connectivity and susceptibility to blockage. The micropore volume, total specific surface area, and the connectivity of the pore structure significantly affect the reserve of wet gases. The adsorption capacity of the micropores and the closed pore structure contribute to the preservation of wet gases. |
| first_indexed | 2024-03-11T10:02:04Z |
| format | Article |
| id | doaj.art-7e2d7f0e085e4687a680f9e4002c886e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T10:02:04Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7e2d7f0e085e4687a680f9e4002c886e2023-11-16T15:19:05ZengMDPI AGEnergies1996-10732022-12-0116143210.3390/en16010432The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW ChinaFengjuan Lan0Yong Qin1Ming Li2Yugan Wang3Yuhang Liu4Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, ChinaKey Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, ChinaKey Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, ChinaKey Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, ChinaKey Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, ChinaThe origin of the high content of wet gases in coalbed seams is very important geologically, especially in the Enhong syncline in China. The present study focuses on the role of the material that generates the hydrocarbons. The effect of the pore structure on the generation of wet gases has not been thoroughly examined. The present paper characterizes the coal pore structure in the “wet gas area” and “dry gas area”. The pore structures in the two areas are shown to have different features, which affect the distribution of the wet gases. With respect to the pore structure parameters, coals in the wet gas area have a greater total specific surface area and pore volume in micropores. The pore structure types also differ between the two areas: the pore structures in the dry gas areas are mainly of the parallel type and reverse S type, which is favorable for the migration and dissipation of coalbed gases. The pore structure in the wet gas area is relatively closed, with poor connectivity and susceptibility to blockage. The micropore volume, total specific surface area, and the connectivity of the pore structure significantly affect the reserve of wet gases. The adsorption capacity of the micropores and the closed pore structure contribute to the preservation of wet gases.https://www.mdpi.com/1996-1073/16/1/432pore structurewet gasesmercury intrusion porosimetrypreservation |
| spellingShingle | Fengjuan Lan Yong Qin Ming Li Yugan Wang Yuhang Liu The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China Energies pore structure wet gases mercury intrusion porosimetry preservation |
| title | The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China |
| title_full | The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China |
| title_fullStr | The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China |
| title_full_unstemmed | The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China |
| title_short | The Effect of Pore Structure on the Distribution of Wet Gases in Coal Seams of Enhong Syncline, SW China |
| title_sort | effect of pore structure on the distribution of wet gases in coal seams of enhong syncline sw china |
| topic | pore structure wet gases mercury intrusion porosimetry preservation |
| url | https://www.mdpi.com/1996-1073/16/1/432 |
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