Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study
For natural gas hydrate (NGH) exploitation, the in-situ electrical heating has been proved as a promising production method in laboratory experimental scale. But the results in this scale are difficult to reliably reflect field trials due to limitations in the size of the reactor. So, by TOUGH+HYDRA...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484720316346 |
| _version_ | 1819076591200763904 |
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| author | Lijia Li Xiaosen Li Yi Wang Yongjiang Luo Bo Li |
| author_facet | Lijia Li Xiaosen Li Yi Wang Yongjiang Luo Bo Li |
| author_sort | Lijia Li |
| collection | DOAJ |
| description | For natural gas hydrate (NGH) exploitation, the in-situ electrical heating has been proved as a promising production method in laboratory experimental scale. But the results in this scale are difficult to reliably reflect field trials due to limitations in the size of the reactor. So, by TOUGH+HYDRATE software, this paper stimulates hydrate exploitation in field scale by in situ electrical heating. In addition, depressurization is applied as a comparison. Based on the analysis of several parameters like reservoir temperature and hydrate distribution, results show that although a larger heating power can result in a faster move of the decomposition front, the fast free gas production takes a large amount of sensible heat out of the reservoir. Also, the electrical heating effect is limited by the heat conductivity of formation in the field scale, so the heat promoting distance of the heating method is less than 10 m after five years production even with 1000 W/m of electrical heating power. A large amount of heat loss and the shortage of heating injection make the energy efficiency of it decreased significantly with the production time. So, large heating power cannot always remain fast gas and water production rates. Furthermore, the higher heating power does not mean a better exploitation effect. Thus, it is vital to choose a reasonable heating power in the field exploitation. Under the NGH reservoir and production parameters set in this paper, the most optimal electrical heating power should be 500 W/m with comprehensive consideration of gas production rate, NGH front promoting velocity and energy efficiency. |
| first_indexed | 2024-12-21T18:43:44Z |
| format | Article |
| id | doaj.art-09d3a5c6d43d4a80a1f22b6c796226d3 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-12-21T18:43:44Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-09d3a5c6d43d4a80a1f22b6c796226d32022-12-21T18:53:56ZengElsevierEnergy Reports2352-48472020-11-01632913302Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical studyLijia Li0Xiaosen Li1Yi Wang2Yongjiang Luo3Bo Li4State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China; Corresponding author at: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, ChinaFor natural gas hydrate (NGH) exploitation, the in-situ electrical heating has been proved as a promising production method in laboratory experimental scale. But the results in this scale are difficult to reliably reflect field trials due to limitations in the size of the reactor. So, by TOUGH+HYDRATE software, this paper stimulates hydrate exploitation in field scale by in situ electrical heating. In addition, depressurization is applied as a comparison. Based on the analysis of several parameters like reservoir temperature and hydrate distribution, results show that although a larger heating power can result in a faster move of the decomposition front, the fast free gas production takes a large amount of sensible heat out of the reservoir. Also, the electrical heating effect is limited by the heat conductivity of formation in the field scale, so the heat promoting distance of the heating method is less than 10 m after five years production even with 1000 W/m of electrical heating power. A large amount of heat loss and the shortage of heating injection make the energy efficiency of it decreased significantly with the production time. So, large heating power cannot always remain fast gas and water production rates. Furthermore, the higher heating power does not mean a better exploitation effect. Thus, it is vital to choose a reasonable heating power in the field exploitation. Under the NGH reservoir and production parameters set in this paper, the most optimal electrical heating power should be 500 W/m with comprehensive consideration of gas production rate, NGH front promoting velocity and energy efficiency.http://www.sciencedirect.com/science/article/pii/S2352484720316346Field exploitation simulationThermal stimulationDepressurizationIn situ electrical heating |
| spellingShingle | Lijia Li Xiaosen Li Yi Wang Yongjiang Luo Bo Li Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study Energy Reports Field exploitation simulation Thermal stimulation Depressurization In situ electrical heating |
| title | Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study |
| title_full | Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study |
| title_fullStr | Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study |
| title_full_unstemmed | Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study |
| title_short | Analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate-bearing sediment with field scale numerical study |
| title_sort | analyzing the applicability of in situ heating methods in the gas production from natural gas hydrate bearing sediment with field scale numerical study |
| topic | Field exploitation simulation Thermal stimulation Depressurization In situ electrical heating |
| url | http://www.sciencedirect.com/science/article/pii/S2352484720316346 |
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