Swelling-induced changes in coal microstructure due to supercritical CO2 injection
©2016. American Geophysical Union. All Rights Reserved. Enhanced coalbed methane recovery and CO2 geostorage in coal seams are severely limited by permeability decrease caused by CO2 injection and associated coal matrix swelling. Typically, it is assumed that matrix swelling leads to coal cleat clos...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Geophysical Union
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/22445 |
| _version_ | 1848750872403640320 |
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| author | Zhang, Y. Lebedev, Maxim Sarmadivaleh, M. Barifcani, Ahmed Iglauer, Stefan |
| author_facet | Zhang, Y. Lebedev, Maxim Sarmadivaleh, M. Barifcani, Ahmed Iglauer, Stefan |
| author_sort | Zhang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | ©2016. American Geophysical Union. All Rights Reserved. Enhanced coalbed methane recovery and CO2 geostorage in coal seams are severely limited by permeability decrease caused by CO2 injection and associated coal matrix swelling. Typically, it is assumed that matrix swelling leads to coal cleat closure, and as a consequence, permeability is reduced. However, this assumption has not yet been directly observed. Using a novel in situ reservoir condition X-ray microcomputed tomography flooding apparatus, for the first time we observed such microcleat closure induced by supercritical CO2 flooding in situ. Furthermore, fracturing of the mineral phase (embedded in the coal) was observed; this fracturing was induced by the internal swelling stress. We conclude that coal permeability is drastically reduced by cleat closure, which again is caused by coal matrix swelling, which again is caused by flooding with supercritical CO2. |
| first_indexed | 2025-11-14T07:43:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-22445 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:43:44Z |
| publishDate | 2016 |
| publisher | American Geophysical Union |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-224452017-09-13T15:35:34Z Swelling-induced changes in coal microstructure due to supercritical CO2 injection Zhang, Y. Lebedev, Maxim Sarmadivaleh, M. Barifcani, Ahmed Iglauer, Stefan ©2016. American Geophysical Union. All Rights Reserved. Enhanced coalbed methane recovery and CO2 geostorage in coal seams are severely limited by permeability decrease caused by CO2 injection and associated coal matrix swelling. Typically, it is assumed that matrix swelling leads to coal cleat closure, and as a consequence, permeability is reduced. However, this assumption has not yet been directly observed. Using a novel in situ reservoir condition X-ray microcomputed tomography flooding apparatus, for the first time we observed such microcleat closure induced by supercritical CO2 flooding in situ. Furthermore, fracturing of the mineral phase (embedded in the coal) was observed; this fracturing was induced by the internal swelling stress. We conclude that coal permeability is drastically reduced by cleat closure, which again is caused by coal matrix swelling, which again is caused by flooding with supercritical CO2. 2016 Journal Article http://hdl.handle.net/20.500.11937/22445 10.1002/2016GL070654 American Geophysical Union fulltext |
| spellingShingle | Zhang, Y. Lebedev, Maxim Sarmadivaleh, M. Barifcani, Ahmed Iglauer, Stefan Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title | Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title_full | Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title_fullStr | Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title_full_unstemmed | Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title_short | Swelling-induced changes in coal microstructure due to supercritical CO2 injection |
| title_sort | swelling-induced changes in coal microstructure due to supercritical co2 injection |
| url | http://hdl.handle.net/20.500.11937/22445 |