Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator
The kinetic behaviors of methane hydrate dissociation under depressurization in porous media are investigated through experimental and numerical simulations. Hydrate samples with low gas saturations (SG⩽0.10) are synthesized in the pilot-scale hydrate simulator (PHS), a novel three-dimensional press...
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ftrepec:oai:RePEc:eee:appene:v:129:y:2014:i:c:p:274-286 2024-04-14T08:14:53+00:00 Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator Li, Bo Li, Xiao-Sen Li, Gang Feng, Jing-Chun Wang, Yi http://www.sciencedirect.com/science/article/pii/S0306261914005133 unknown http://www.sciencedirect.com/science/article/pii/S0306261914005133 article ftrepec 2024-03-19T10:32:09Z The kinetic behaviors of methane hydrate dissociation under depressurization in porous media are investigated through experimental and numerical simulations. Hydrate samples with low gas saturations (SG⩽0.10) are synthesized in the pilot-scale hydrate simulator (PHS), a novel three-dimensional pressure vessel with effective inner volume of 117.8L. Three experimental runs with different production pressure at the central vertical well have been carried out. The intrinsic dissociation rate constant k0 is fitted to be approximately 4578kg/(m2Pa s) using the experimental data of run 1, and it is used for the kinetic simulation in all the three runs. The whole production process can be divided into two stages: the free gas and mixed gas production (stage I) and the gas production from hydrate dissociation (stage II). Both the experimental and numerical simulation results show that the gas production rate increases with the decrease of the production pressure, while the water extraction rate will rise much higher if the wellbore pressure is dropped extremely low. The free gas saturation is found to be a key factor that affects the overall production behaviors of marine hydrate deposits. In addition, the comparisons of the kinetic and equilibrium models indicate that the kinetic limitations are very small in the PHS. The hydrate dissociation under depressurization in the PHS is mainly controlled by the mass and heat transfer processes. Gas hydrate; Depressurization; Porous media; Numerical simulation; Intrinsic rate; Article in Journal/Newspaper Methane hydrate RePEc (Research Papers in Economics) |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
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unknown |
description |
The kinetic behaviors of methane hydrate dissociation under depressurization in porous media are investigated through experimental and numerical simulations. Hydrate samples with low gas saturations (SG⩽0.10) are synthesized in the pilot-scale hydrate simulator (PHS), a novel three-dimensional pressure vessel with effective inner volume of 117.8L. Three experimental runs with different production pressure at the central vertical well have been carried out. The intrinsic dissociation rate constant k0 is fitted to be approximately 4578kg/(m2Pa s) using the experimental data of run 1, and it is used for the kinetic simulation in all the three runs. The whole production process can be divided into two stages: the free gas and mixed gas production (stage I) and the gas production from hydrate dissociation (stage II). Both the experimental and numerical simulation results show that the gas production rate increases with the decrease of the production pressure, while the water extraction rate will rise much higher if the wellbore pressure is dropped extremely low. The free gas saturation is found to be a key factor that affects the overall production behaviors of marine hydrate deposits. In addition, the comparisons of the kinetic and equilibrium models indicate that the kinetic limitations are very small in the PHS. The hydrate dissociation under depressurization in the PHS is mainly controlled by the mass and heat transfer processes. Gas hydrate; Depressurization; Porous media; Numerical simulation; Intrinsic rate; |
format |
Article in Journal/Newspaper |
author |
Li, Bo Li, Xiao-Sen Li, Gang Feng, Jing-Chun Wang, Yi |
spellingShingle |
Li, Bo Li, Xiao-Sen Li, Gang Feng, Jing-Chun Wang, Yi Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
author_facet |
Li, Bo Li, Xiao-Sen Li, Gang Feng, Jing-Chun Wang, Yi |
author_sort |
Li, Bo |
title |
Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
title_short |
Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
title_full |
Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
title_fullStr |
Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
title_full_unstemmed |
Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
title_sort |
depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator |
url |
http://www.sciencedirect.com/science/article/pii/S0306261914005133 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0306261914005133 |
_version_ |
1796313126494273536 |