Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy
Optimization of the depressurization pathways plays a crucial role in avoiding potential geohazards while increasing hydrate production efficiency. In this study, methane hydrate was formed in a flexible plastic vessel and then gas production processes were conducted at constant confining pressure a...
Published in: | Geofluids |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1155/2021/4352910 https://doaj.org/article/379de9e3eeea4a0ab12567b83006dd73 |
id |
ftdoajarticles:oai:doaj.org/article:379de9e3eeea4a0ab12567b83006dd73 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:379de9e3eeea4a0ab12567b83006dd73 2024-09-09T19:52:11+00:00 Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy Yanlong Li Chuqiao He Nengyou Wu Qiang Chen Changling Liu Zhixue Sun Yurong Jin Qingguo Meng 2021-01-01T00:00:00Z https://doi.org/10.1155/2021/4352910 https://doaj.org/article/379de9e3eeea4a0ab12567b83006dd73 EN eng Wiley http://dx.doi.org/10.1155/2021/4352910 https://doaj.org/toc/1468-8115 https://doaj.org/toc/1468-8123 1468-8115 1468-8123 doi:10.1155/2021/4352910 https://doaj.org/article/379de9e3eeea4a0ab12567b83006dd73 Geofluids, Vol 2021 (2021) Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1155/2021/4352910 2024-08-05T17:48:44Z Optimization of the depressurization pathways plays a crucial role in avoiding potential geohazards while increasing hydrate production efficiency. In this study, methane hydrate was formed in a flexible plastic vessel and then gas production processes were conducted at constant confining pressure and constant confining temperature. The CMG-STARS simulator was applied to match the experimental gas production behavior and to derive the hydrate intrinsic dissociation constant. Secondly, fluid production behavior, pressure-temperature (P‐T) responses, and hydrate saturation evolution behaviors under different depressurization pathways were analyzed. The results show that integrated gas-water ratio (IGWR) decreases linearly with the increase in depressurizing magnitude in each step, while it rises logarithmically with the increase in the number of steps. Under the same initial average hydrate saturation and the same total pressure-drop magnitude, a slow and multistage depressurization strategy would help to increase the IGWR and avoid severe temperature drop. The pore pressure rebounds logarithmically once the gas production is suspended, and would decrease to the regular level instantaneously once the shut-in operation is ended. We speculate that the shut-in operation could barely affect the IGWR and formation P‐T response in the long-term level. Article in Journal/Newspaper Methane hydrate Directory of Open Access Journals: DOAJ Articles Geofluids 2021 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 Yanlong Li Chuqiao He Nengyou Wu Qiang Chen Changling Liu Zhixue Sun Yurong Jin Qingguo Meng Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
topic_facet |
Geology QE1-996.5 |
description |
Optimization of the depressurization pathways plays a crucial role in avoiding potential geohazards while increasing hydrate production efficiency. In this study, methane hydrate was formed in a flexible plastic vessel and then gas production processes were conducted at constant confining pressure and constant confining temperature. The CMG-STARS simulator was applied to match the experimental gas production behavior and to derive the hydrate intrinsic dissociation constant. Secondly, fluid production behavior, pressure-temperature (P‐T) responses, and hydrate saturation evolution behaviors under different depressurization pathways were analyzed. The results show that integrated gas-water ratio (IGWR) decreases linearly with the increase in depressurizing magnitude in each step, while it rises logarithmically with the increase in the number of steps. Under the same initial average hydrate saturation and the same total pressure-drop magnitude, a slow and multistage depressurization strategy would help to increase the IGWR and avoid severe temperature drop. The pore pressure rebounds logarithmically once the gas production is suspended, and would decrease to the regular level instantaneously once the shut-in operation is ended. We speculate that the shut-in operation could barely affect the IGWR and formation P‐T response in the long-term level. |
format |
Article in Journal/Newspaper |
author |
Yanlong Li Chuqiao He Nengyou Wu Qiang Chen Changling Liu Zhixue Sun Yurong Jin Qingguo Meng |
author_facet |
Yanlong Li Chuqiao He Nengyou Wu Qiang Chen Changling Liu Zhixue Sun Yurong Jin Qingguo Meng |
author_sort |
Yanlong Li |
title |
Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
title_short |
Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
title_full |
Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
title_fullStr |
Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
title_full_unstemmed |
Laboratory Study on Hydrate Production Using a Slow, Multistage Depressurization Strategy |
title_sort |
laboratory study on hydrate production using a slow, multistage depressurization strategy |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1155/2021/4352910 https://doaj.org/article/379de9e3eeea4a0ab12567b83006dd73 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Geofluids, Vol 2021 (2021) |
op_relation |
http://dx.doi.org/10.1155/2021/4352910 https://doaj.org/toc/1468-8115 https://doaj.org/toc/1468-8123 1468-8115 1468-8123 doi:10.1155/2021/4352910 https://doaj.org/article/379de9e3eeea4a0ab12567b83006dd73 |
op_doi |
https://doi.org/10.1155/2021/4352910 |
container_title |
Geofluids |
container_volume |
2021 |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1809921531108655104 |