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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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/10899 2023-05-15T17:12:06+02:00 Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System Liang, Yun-Pei Li, Xiao-Sen Li, Bo 2015-10-01 http://ir.giec.ac.cn/handle/344007/10899 https://doi.org/10.3390/en81010796 英语 eng Energies http://ir.giec.ac.cn/handle/344007/10899 doi:10.3390/en81010796 Gas Hydrate Depressurization Thermal Stimulation Five-spot Well Qilian Mountain Permafrost Science & Technology Technology Energy & Fuels QINGHAI-TIBET PLATEAU METHANE HYDRATE POROUS-MEDIA NUMERICAL-SIMULATION SENSITIVITY-ANALYSIS PUFF METHOD NORTHWEST CHINA DEPOSITS DISSOCIATION Article 期刊论文 2015 ftchacadsciegiec https://doi.org/10.3390/en81010796 2022-09-23T14:12:36Z 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 Methane hydrate permafrost Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Energies 8 10 10796 10817 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Gas Hydrate Depressurization Thermal Stimulation Five-spot Well Qilian Mountain Permafrost Science & Technology Technology Energy & Fuels QINGHAI-TIBET PLATEAU METHANE HYDRATE POROUS-MEDIA NUMERICAL-SIMULATION SENSITIVITY-ANALYSIS PUFF METHOD NORTHWEST CHINA DEPOSITS DISSOCIATION |
spellingShingle |
Gas Hydrate Depressurization Thermal Stimulation Five-spot Well Qilian Mountain Permafrost Science & Technology Technology Energy & Fuels QINGHAI-TIBET PLATEAU METHANE HYDRATE POROUS-MEDIA NUMERICAL-SIMULATION SENSITIVITY-ANALYSIS PUFF METHOD NORTHWEST CHINA DEPOSITS DISSOCIATION Liang, Yun-Pei Li, Xiao-Sen Li, Bo 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 Science & Technology Technology Energy & Fuels QINGHAI-TIBET PLATEAU METHANE HYDRATE POROUS-MEDIA NUMERICAL-SIMULATION SENSITIVITY-ANALYSIS PUFF METHOD NORTHWEST CHINA DEPOSITS DISSOCIATION |
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 |
Liang, Yun-Pei Li, Xiao-Sen Li, Bo |
author_facet |
Liang, Yun-Pei Li, Xiao-Sen Li, Bo |
author_sort |
Liang, Yun-Pei |
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 |
publishDate |
2015 |
url |
http://ir.giec.ac.cn/handle/344007/10899 https://doi.org/10.3390/en81010796 |
genre |
Methane hydrate permafrost |
genre_facet |
Methane hydrate permafrost |
op_relation |
Energies http://ir.giec.ac.cn/handle/344007/10899 doi:10.3390/en81010796 |
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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1766068872649113600 |