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Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation
[Image: see text] The exploitation of natural gas hydrate is always hindered by the migration of water and sands due to gas production. Depressurization combined with thermal stimulation is an effective method for hydrate dissociation. This paper reported the influence of gas–liquid–solid migration...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6812342/ https://www.ncbi.nlm.nih.gov/pubmed/31656928 http://dx.doi.org/10.1021/acsomega.9b02497 |
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author | Cheng, Chuanxiao Wang, Fan Zhang, Jun Qi, Tian Xu, Peiyuan Zheng, Jili Zhao, Jiafei Zhang, Hanquan Xiao, Bo Li, Lun Yang, Penglin Lv, Shuai |
author_facet | Cheng, Chuanxiao Wang, Fan Zhang, Jun Qi, Tian Xu, Peiyuan Zheng, Jili Zhao, Jiafei Zhang, Hanquan Xiao, Bo Li, Lun Yang, Penglin Lv, Shuai |
author_sort | Cheng, Chuanxiao |
collection | PubMed |
description | [Image: see text] The exploitation of natural gas hydrate is always hindered by the migration of water and sands due to gas production. Depressurization combined with thermal stimulation is an effective method for hydrate dissociation. This paper reported the influence of gas–liquid–solid migration on morphological change of hydrate sediments in natural gas production using visualization method. Different backpressures combined with thermal stimulation methods were applied to simulate natural gas hydrate exploitation. Pressure compensation was first employed to study sediment recovery features. The expansion rate of a porous medium layer under combined dissociation and different backpressure (4.5, 3.5, 2.5, 1.5, and 0.1 MPa) was discussed. A 176% hydrate sediment expansion rate was found after the combined dissociation at 0.1 MPa. In addition, it was observed that the height of the water layer above the porous media after pressure compensation was gradually reduced with a decrease in backpressure and eventually disappeared at 0.1 MPa. It was also found that the disappearing water layer caused an anomalous memory effect phenomenon. Expansion and subsidence of sediments provide a better reference for hydrate exploitation and geological safety. |
format | Online Article Text |
id | pubmed-6812342 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-68123422019-10-25 Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation Cheng, Chuanxiao Wang, Fan Zhang, Jun Qi, Tian Xu, Peiyuan Zheng, Jili Zhao, Jiafei Zhang, Hanquan Xiao, Bo Li, Lun Yang, Penglin Lv, Shuai ACS Omega [Image: see text] The exploitation of natural gas hydrate is always hindered by the migration of water and sands due to gas production. Depressurization combined with thermal stimulation is an effective method for hydrate dissociation. This paper reported the influence of gas–liquid–solid migration on morphological change of hydrate sediments in natural gas production using visualization method. Different backpressures combined with thermal stimulation methods were applied to simulate natural gas hydrate exploitation. Pressure compensation was first employed to study sediment recovery features. The expansion rate of a porous medium layer under combined dissociation and different backpressure (4.5, 3.5, 2.5, 1.5, and 0.1 MPa) was discussed. A 176% hydrate sediment expansion rate was found after the combined dissociation at 0.1 MPa. In addition, it was observed that the height of the water layer above the porous media after pressure compensation was gradually reduced with a decrease in backpressure and eventually disappeared at 0.1 MPa. It was also found that the disappearing water layer caused an anomalous memory effect phenomenon. Expansion and subsidence of sediments provide a better reference for hydrate exploitation and geological safety. American Chemical Society 2019-10-10 /pmc/articles/PMC6812342/ /pubmed/31656928 http://dx.doi.org/10.1021/acsomega.9b02497 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Cheng, Chuanxiao Wang, Fan Zhang, Jun Qi, Tian Xu, Peiyuan Zheng, Jili Zhao, Jiafei Zhang, Hanquan Xiao, Bo Li, Lun Yang, Penglin Lv, Shuai Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation |
title | Gas–Liquid–Solid Migration Characteristics
of Gas Hydrate Sediments in Depressurization Combined with Thermal
Stimulation Dissociation |
title_full | Gas–Liquid–Solid Migration Characteristics
of Gas Hydrate Sediments in Depressurization Combined with Thermal
Stimulation Dissociation |
title_fullStr | Gas–Liquid–Solid Migration Characteristics
of Gas Hydrate Sediments in Depressurization Combined with Thermal
Stimulation Dissociation |
title_full_unstemmed | Gas–Liquid–Solid Migration Characteristics
of Gas Hydrate Sediments in Depressurization Combined with Thermal
Stimulation Dissociation |
title_short | Gas–Liquid–Solid Migration Characteristics
of Gas Hydrate Sediments in Depressurization Combined with Thermal
Stimulation Dissociation |
title_sort | gas–liquid–solid migration characteristics
of gas hydrate sediments in depressurization combined with thermal
stimulation dissociation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6812342/ https://www.ncbi.nlm.nih.gov/pubmed/31656928 http://dx.doi.org/10.1021/acsomega.9b02497 |
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