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Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR
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| Veröffentlicht in: | Energy reports year:2020; month:02; 6(2020) vom: Feb., Seite 550-561; volume:6; pages:550-561 |
|---|---|
| Personen und Körperschaften: | , , , , |
| Titel: | Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR/ Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao |
| Format: | E-Book-Kapitel |
| Sprache: | Englisch |
| veröffentlicht: |
2020
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| Gesamtaufnahme: |
: Energy reports, 6(2020) vom: Feb., Seite 550-561
, volume:6 |
| Schlagwörter: | |
| Quelle: | Verbunddaten SWB Lizenzfreie Online-Ressourcen |
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| 520 | |a The method of improving permeability of coal seams by freeze-fracturing is presented to accelerate the diffusion of coalbed gas into exploited wells. The pore structure of coal sample changes caused by freeze-fracturing were characterized by nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and a permeability-calculation model was employed to estimate the permeability of coal sample. The pore size distribution, porosity, and permeability of coal before and after freezing were analyzed. Results show that freeze-fracturing can complicate the coal pore structure, and its complexity is positively correlated with the freezing temperature and coal moisture content. The main manifestation is the growth and expansion of coal pores, with higher pore connectivity, generation of gas seepage pores with pore diameter > 100 nm, and expansion of original pores into larger ones. By comparing the connectivity and seepage space of the pore structure of coal before and after freezing, it is concluded that freeze-fracturing can promote the coal seam permeability significantly, which is beneficial for the exploitation of coalbed gas. | ||
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| contents | The method of improving permeability of coal seams by freeze-fracturing is presented to accelerate the diffusion of coalbed gas into exploited wells. The pore structure of coal sample changes caused by freeze-fracturing were characterized by nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and a permeability-calculation model was employed to estimate the permeability of coal sample. The pore size distribution, porosity, and permeability of coal before and after freezing were analyzed. Results show that freeze-fracturing can complicate the coal pore structure, and its complexity is positively correlated with the freezing temperature and coal moisture content. The main manifestation is the growth and expansion of coal pores, with higher pore connectivity, generation of gas seepage pores with pore diameter > 100 nm, and expansion of original pores into larger ones. By comparing the connectivity and seepage space of the pore structure of coal before and after freezing, it is concluded that freeze-fracturing can promote the coal seam permeability significantly, which is beneficial for the exploitation of coalbed gas. |
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| spelling | Liang, Yunpei VerfasserIn (DE-588)120826009X (DE-627)1694502945 aut, Improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field NMR Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao, 2020, Text txt rdacontent, Computermedien c rdamedia, Online-Ressource cr rdacarrier, DE-206 Open Access Controlled Vocabulary for Access Rights http://purl.org/coar/access_right/c_abf2, The method of improving permeability of coal seams by freeze-fracturing is presented to accelerate the diffusion of coalbed gas into exploited wells. The pore structure of coal sample changes caused by freeze-fracturing were characterized by nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and a permeability-calculation model was employed to estimate the permeability of coal sample. The pore size distribution, porosity, and permeability of coal before and after freezing were analyzed. Results show that freeze-fracturing can complicate the coal pore structure, and its complexity is positively correlated with the freezing temperature and coal moisture content. The main manifestation is the growth and expansion of coal pores, with higher pore connectivity, generation of gas seepage pores with pore diameter > 100 nm, and expansion of original pores into larger ones. By comparing the connectivity and seepage space of the pore structure of coal before and after freezing, it is concluded that freeze-fracturing can promote the coal seam permeability significantly, which is beneficial for the exploitation of coalbed gas., DE-206 Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International CC BY-NC-ND 4.0 cc https://creativecommons.org/licenses/by-nc-nd/4.0/, (DE-206)49 Aufsatz in Zeitschrift DE-206, Tan, Youting VerfasserIn (DE-588)1208260243 (DE-627)1694502996 aut, Wang, Fakai VerfasserIn (DE-588)1208668455 (DE-627)1695025776 aut, Luo, Yongjiang VerfasserIn (DE-588)1208668498 (DE-627)1695026187 aut, Zhao, Zhiqiang VerfasserIn (DE-588)1208668501 (DE-627)1695026225 aut, Enthalten in Energy reports Amsterdam [u.a.] : Elsevier, 2015 6(2020) vom: Feb., Seite 550-561 Online-Ressource (DE-627)820689033 (DE-600)2814795-9 (DE-576)427950821 2352-4847 nnns, volume:6 year:2020 month:02 pages:550-561, https://www.sciencedirect.com/science/article/pii/S2352484719313277/pdfft?md5=de628826b6294d5b87ce6d6f2be988c0&pid=1-s2.0-S2352484719313277-main.pdf Verlag kostenfrei, https://doi.org/10.1016/j.egyr.2020.02.033 Resolving-System kostenfrei, http://hdl.handle.net/10419/244057 Resolving-System kostenfrei, https://doi.org/10.1016/j.egyr.2020.02.033 LFER, https://www.sciencedirect.com/science/article/pii/S2352484719313277/pdfft?md5=de628826b6294d5b87ce6d6f2be988c0&pid=1-s2.0-S2352484719313277-main.pdf LFER, LFER epn:3621305351 2020-04-07T00:00:00Z |
| spellingShingle | Liang, Yunpei, Tan, Youting, Wang, Fakai, Luo, Yongjiang, Zhao, Zhiqiang, Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR, The method of improving permeability of coal seams by freeze-fracturing is presented to accelerate the diffusion of coalbed gas into exploited wells. The pore structure of coal sample changes caused by freeze-fracturing were characterized by nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and a permeability-calculation model was employed to estimate the permeability of coal sample. The pore size distribution, porosity, and permeability of coal before and after freezing were analyzed. Results show that freeze-fracturing can complicate the coal pore structure, and its complexity is positively correlated with the freezing temperature and coal moisture content. The main manifestation is the growth and expansion of coal pores, with higher pore connectivity, generation of gas seepage pores with pore diameter > 100 nm, and expansion of original pores into larger ones. By comparing the connectivity and seepage space of the pore structure of coal before and after freezing, it is concluded that freeze-fracturing can promote the coal seam permeability significantly, which is beneficial for the exploitation of coalbed gas., Aufsatz in Zeitschrift |
| title | Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR |
| title_auth | Improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field NMR |
| title_full | Improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field NMR Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao |
| title_fullStr | Improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field NMR Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao |
| title_full_unstemmed | Improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field NMR Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao |
| title_in_hierarchy | Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR / Yunpei Liang, Youting Tan, Fakai Wang, Yongjiang Luo, Zhiqiang Zhao, |
| title_short | Improving permeability of coal seams by freeze-fracturing method |
| title_sort | improving permeability of coal seams by freeze-fracturing method the characterization of pore structure changes under low-field nmr |
| title_sub | the characterization of pore structure changes under low-field NMR |
| title_unstemmed | Improving permeability of coal seams by freeze-fracturing method: the characterization of pore structure changes under low-field NMR |
| topic | Aufsatz in Zeitschrift |
| topic_facet | Aufsatz in Zeitschrift |
| url | https://www.sciencedirect.com/science/article/pii/S2352484719313277/pdfft?md5=de628826b6294d5b87ce6d6f2be988c0&pid=1-s2.0-S2352484719313277-main.pdf, https://doi.org/10.1016/j.egyr.2020.02.033, http://hdl.handle.net/10419/244057 |
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