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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ftmdpi:oai:mdpi.com:/1996-1073/8/10/10796/ 2023-08-20T04:09:11+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 2015-09-28 application/pdf https://doi.org/10.3390/en81010796 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/en81010796 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 8; Issue 10; Pages: 10796-10817 gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost Text 2015 ftmdpi https://doi.org/10.3390/en81010796 2023-07-31T20:46:52Z 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. Text permafrost MDPI Open Access Publishing Energies 8 10 10796 10817 |
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language |
English |
topic |
gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost |
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gas hydrate depressurization thermal stimulation five-spot well Qilian Mountain permafrost 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 |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2015 |
url |
https://doi.org/10.3390/en81010796 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Energies; Volume 8; Issue 10; Pages: 10796-10817 |
op_relation |
https://dx.doi.org/10.3390/en81010796 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en81010796 |
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Energies |
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8 |
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10 |
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10796 |
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10817 |
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