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Hydrate dissociation induced by depressurization in conjunction with warm brine stimulation in cubic hydrate simulator with silica sand
Feng, Jing-Chun1,2,3,4; Wang, Yi1,2,3; Li, Xiao-Sen1,2,3
2016-07-15
Source PublicationAPPLIED ENERGY
Volume174Pages:181-191
AbstractTo study the effect of salt concentration of brine injection on hydrate dissociation, hydrate dissociation experiments induced by depressurization in conjunction with warm brine stimulation have been carried out in a Cubic Hydrate Simulator (CHS). The dual horizontal wells were set as the well configuration. The results indicate that the salinity in the reservoir decreases continuously during the depressurizing stage under the mixture of fresh water from hydrate dissociation. However, the salinity increases overtime during the constant-pressure stage (the injection stage) by the mass transfer with the injected brine. The gas production rate and heat-transfer rate for pure water injection are lower than those for brine injection. In addition, raising the injected salinity can enhance the rates of heat transfer and gas production when the salinity is lower than 10.0%. However, the promotion effect of brine injection on hydrate dissociation is limited when the injected salinity is beyond 10.0%. This is because the specific heat of the brine declines with the increase of the salinity, which causes the decrease of heat injection rate. The water production rate equals to the water injection rate in the process of brine injection. The energy analysis and the evaluation of energy ratio indicate that the optimal injected salinity in this work is 10.0%. (C) 2016 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordHydrate Depressurization Thermal Stimulation Warm Brine Brine Concentration
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2016.04.090
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordSOUTH CHINA SEA ; DUAL HORIZONTAL WELLS ; METHANE-HYDRATE ; GAS-PRODUCTION ; THERMAL-STIMULATION ; HEAT-TRANSFER ; POROUS-MEDIA ; PRODUCTION BEHAVIORS ; RESERVOIR ; INJECTION
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000377728700015
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11749
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100083, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Feng, Jing-Chun,Wang, Yi,Li, Xiao-Sen. Hydrate dissociation induced by depressurization in conjunction with warm brine stimulation in cubic hydrate simulator with silica sand[J]. APPLIED ENERGY,2016,174:181-191.
APA Feng, Jing-Chun,Wang, Yi,&Li, Xiao-Sen.(2016).Hydrate dissociation induced by depressurization in conjunction with warm brine stimulation in cubic hydrate simulator with silica sand.APPLIED ENERGY,174,181-191.
MLA Feng, Jing-Chun,et al."Hydrate dissociation induced by depressurization in conjunction with warm brine stimulation in cubic hydrate simulator with silica sand".APPLIED ENERGY 174(2016):181-191.
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