Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System
The main purpose of this study is to investigate the production behaviors of gas hydrate at site DK-2 in the Qilian Mountain permafrost using the novel five-spot well (5S) system by means of numerical simulation. The whole system is composed of several identical units, and each single unit consists...
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2015
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ftdoajarticles:oai:doaj.org/article:3a9099483a18469093cb99c8c41a3af9 2023-05-15T17:57:06+02:00 Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System Yun-Pei Liang Xiao-Sen Li Bo Li 2015-09-01T00:00:00Z https://doi.org/10.3390/en81010796 https://doaj.org/article/3a9099483a18469093cb99c8c41a3af9 EN eng MDPI AG http://www.mdpi.com/1996-1073/8/10/10796 https://doaj.org/toc/1996-1073 1996-1073 doi:10.3390/en81010796 https://doaj.org/article/3a9099483a18469093cb99c8c41a3af9 Energies, Vol 8, Iss 10, Pp 10796-10817 (2015) gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost Technology T article 2015 ftdoajarticles https://doi.org/10.3390/en81010796 2022-12-30T19:55:16Z The main purpose of this study is to investigate the production behaviors of gas hydrate at site DK-2 in the Qilian Mountain permafrost using the novel five-spot well (5S) system by means of numerical simulation. The whole system is composed of several identical units, and each single unit consists of one injection well and four production wells. All the wells are placed horizontally in the hydrate deposit. The combination method of depressurization and thermal stimulation is employed for hydrate dissociation in the system. Simulation results show that favorable gas production and hydrate dissociation rates, gas-to-water ratio, and energy ratio can be acquired using this kind of multi-well system under suitable heat injection and depressurization driving forces, and the water production rate is manageable in the entire production process under current technology. In addition, another two kinds of two-spot well (2S) systems have also been employed for comparison. It is found that the 5S system will be more commercially profitable than the 2S configurations for gas production under the same operation conditions. Sensitivity analysis indicates that the gas production performance is dependent on the heat injection rate and the well spacing of the 5S system. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Energies 8 10 10796 10817 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost Technology T |
spellingShingle |
gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost Technology T Yun-Pei Liang Xiao-Sen Li Bo Li Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
topic_facet |
gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost Technology T |
description |
The main purpose of this study is to investigate the production behaviors of gas hydrate at site DK-2 in the Qilian Mountain permafrost using the novel five-spot well (5S) system by means of numerical simulation. The whole system is composed of several identical units, and each single unit consists of one injection well and four production wells. All the wells are placed horizontally in the hydrate deposit. The combination method of depressurization and thermal stimulation is employed for hydrate dissociation in the system. Simulation results show that favorable gas production and hydrate dissociation rates, gas-to-water ratio, and energy ratio can be acquired using this kind of multi-well system under suitable heat injection and depressurization driving forces, and the water production rate is manageable in the entire production process under current technology. In addition, another two kinds of two-spot well (2S) systems have also been employed for comparison. It is found that the 5S system will be more commercially profitable than the 2S configurations for gas production under the same operation conditions. Sensitivity analysis indicates that the gas production performance is dependent on the heat injection rate and the well spacing of the 5S system. |
format |
Article in Journal/Newspaper |
author |
Yun-Pei Liang Xiao-Sen Li Bo Li |
author_facet |
Yun-Pei Liang Xiao-Sen Li Bo Li |
author_sort |
Yun-Pei Liang |
title |
Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
title_short |
Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
title_full |
Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
title_fullStr |
Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
title_full_unstemmed |
Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System |
title_sort |
assessment of gas production potential from hydrate reservoir in qilian mountain permafrost using five-spot horizontal well system |
publisher |
MDPI AG |
publishDate |
2015 |
url |
https://doi.org/10.3390/en81010796 https://doaj.org/article/3a9099483a18469093cb99c8c41a3af9 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Energies, Vol 8, Iss 10, Pp 10796-10817 (2015) |
op_relation |
http://www.mdpi.com/1996-1073/8/10/10796 https://doaj.org/toc/1996-1073 1996-1073 doi:10.3390/en81010796 https://doaj.org/article/3a9099483a18469093cb99c8c41a3af9 |
op_doi |
https://doi.org/10.3390/en81010796 |
container_title |
Energies |
container_volume |
8 |
container_issue |
10 |
container_start_page |
10796 |
op_container_end_page |
10817 |
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1766165475417391104 |