Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction
Natural gas hydrate (NGH) is a clean energy with huge potential reserves. Therefore, it is essential to understand the hydrate formation and dissociation characteristics for NGH production. Methane hydrate formation under gas migration condition was studied as pre-exploratory step for hydrate reform...
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ftrepec:oai:RePEc:eee:appene:v:227:y:2018:i:c:p:703-709 2024-04-14T08:14:50+00:00 Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction Wang, Pengfei Wang, Shenglong Song, Yongchen Yang, Mingjun http://www.sciencedirect.com/science/article/pii/S030626191731067X unknown http://www.sciencedirect.com/science/article/pii/S030626191731067X article ftrepec 2024-03-19T10:27:32Z Natural gas hydrate (NGH) is a clean energy with huge potential reserves. Therefore, it is essential to understand the hydrate formation and dissociation characteristics for NGH production. Methane hydrate formation under gas migration condition was studied as pre-exploratory step for hydrate reformation research. Vessel pressure changes, methane hydrate saturation (Sh) and residual aqueous water saturation (Sw) were measured and analyzed in this study. Residual aqueous water distribution is also illustrated by magnetic resonance imaging (MRI). We found that, when Sw0 was higher than 0.4, the capillary force affected the aqueous water migration more than when Sw0 was lower than 0.4. Hence, Sh-max had a positive correlation with Sw0 when Sw0 is lower than 0.4. In addition, an upward methane flow is more likely to cause aqueous water redistribution than a downward methane flow. Moreover, we found that the aqueous water distribution changes could not recover after hydrate dissociation. Furthermore, the shifting of the hydrate dissociation boundaries from the vessel wall towards the core can be observed from the MRI images. Nature gas hydrate; Methane flow; Aqueous water migration; MRI; Article in Journal/Newspaper Methane hydrate RePEc (Research Papers in Economics) |
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Natural gas hydrate (NGH) is a clean energy with huge potential reserves. Therefore, it is essential to understand the hydrate formation and dissociation characteristics for NGH production. Methane hydrate formation under gas migration condition was studied as pre-exploratory step for hydrate reformation research. Vessel pressure changes, methane hydrate saturation (Sh) and residual aqueous water saturation (Sw) were measured and analyzed in this study. Residual aqueous water distribution is also illustrated by magnetic resonance imaging (MRI). We found that, when Sw0 was higher than 0.4, the capillary force affected the aqueous water migration more than when Sw0 was lower than 0.4. Hence, Sh-max had a positive correlation with Sw0 when Sw0 is lower than 0.4. In addition, an upward methane flow is more likely to cause aqueous water redistribution than a downward methane flow. Moreover, we found that the aqueous water distribution changes could not recover after hydrate dissociation. Furthermore, the shifting of the hydrate dissociation boundaries from the vessel wall towards the core can be observed from the MRI images. Nature gas hydrate; Methane flow; Aqueous water migration; MRI; |
format |
Article in Journal/Newspaper |
author |
Wang, Pengfei Wang, Shenglong Song, Yongchen Yang, Mingjun |
spellingShingle |
Wang, Pengfei Wang, Shenglong Song, Yongchen Yang, Mingjun Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
author_facet |
Wang, Pengfei Wang, Shenglong Song, Yongchen Yang, Mingjun |
author_sort |
Wang, Pengfei |
title |
Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
title_short |
Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
title_full |
Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
title_fullStr |
Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
title_full_unstemmed |
Dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
title_sort |
dynamic measurements of methane hydrate formation/dissociation in different gas flow direction |
url |
http://www.sciencedirect.com/science/article/pii/S030626191731067X |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.sciencedirect.com/science/article/pii/S030626191731067X |
_version_ |
1796313069377290240 |