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Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator
Li, Bo1,2,3; Li, Xiao-Sen1,2; Li, Gang1,2; Feng, Jing-Chun1,2,3; Wang, Yi1,2
2014-09-15
Source PublicationAPPLIED ENERGY
Volume129Pages:274-286
AbstractThe kinetic behaviors of methane hydrate dissociation under depressurization in porous media are investigated through experimental and numerical simulations. Hydrate samples with low gas saturations (S-G <= 0.10) are synthesized in the pilot-scale hydrate simulator (PHS), a novel three-dimensional pressure vessel with effective inner volume of 117.8 L. Three experimental runs with different production pressure at the central vertical well have been carried out. The intrinsic dissociation rate constant k(0) is fitted to be approximately 4578 kg/(m(2) Pa s) using the experimental data of run 1, and it is used for the kinetic simulation in all the three runs. The whole production process can be divided into two stages: the free gas and mixed gas production (stage I) and the gas production from hydrate dissociation (stage II). Both the experimental and numerical simulation results show that the gas production rate increases with the decrease of the production pressure, while the water extraction rate will rise much higher if the wellbore pressure is dropped extremely low. The free gas saturation is found to be a key factor that affects the overall production behaviors of marine hydrate deposits. In addition, the comparisons of the kinetic and equilibrium models indicate that the kinetic limitations are very small in the PHS. The hydrate dissociation under depressurization in the PHS is mainly controlled by the mass and heat transfer processes. (C) 2014 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordGas Hydrate Depressurization Porous Media Numerical Simulation Intrinsic Rate
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2014.05.018
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordETHYLENE-GLYCOL INJECTION ; METHANE-HYDRATE ; POROUS-MEDIA ; PRODUCTION BEHAVIOR ; UNCONSOLIDATED SEDIMENT ; THERMAL-STIMULATION ; 5-SPOT WELL ; PUFF METHOD ; DISSOCIATION ; DECOMPOSITION
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000339775400029
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10637
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
3.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
Li, Bo,Li, Xiao-Sen,Li, Gang,et al. Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator[J]. APPLIED ENERGY,2014,129:274-286.
APA Li, Bo,Li, Xiao-Sen,Li, Gang,Feng, Jing-Chun,&Wang, Yi.(2014).Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator.APPLIED ENERGY,129,274-286.
MLA Li, Bo,et al."Depressurization induced gas production from hydrate deposits with low gas saturation in a pilot-scale hydrate simulator".APPLIED ENERGY 129(2014):274-286.
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