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Numerical analysis of methane hydrate decomposition experiments by depressurization around freezing point in porous media
Li, Bo1,2; Liang, Yun-Pei1,2; Li, Xiao-Sen3; Wu, Hui-Jie3
2015-11-01
Source PublicationFUEL
Volume159Pages:925-934
AbstractThe depressurization-induced decomposition behaviors of methane hydrate around the freezing point in porous media are investigated in this numerical study. A total of three cases have been simulated in a cylindrical reactor using a central vertical well with the production pressure P-W = 2.20, 2.60, and 3.00 MPa, respectively. The simulation results of the pressure and temperature profiles and gas production processes are then compared with the corresponding experimental data. Both the experimental and numerical results indicate the existence of a "freezing stage'' in the case of P-W = 2.20 MPa (Case 1). Four phases of gas, liquid, ice, and hydrate are observed to coexist in the reactor in this freezing stage. Comparing with other two cases, the hydrate dissociation in Case 1 is promoted by three kinds of heat: the reservoir sensible heat Q(S), the conducted heat from the boundaries Q(B), and the latent heat from ice transition Q(I). It is found that the Q(S) and Q(I) play an important role in promoting the fastest hydrate dissociation in the early depressurization stage of Case 1. In addition, the ice phase is found to be formed in the central area of the hydrate deposit and in the vicinity of the production well. Although the formed ice may cause flow blockage for the gas and water, the released latent heat is still attractive for the fast hydrate dissociation under depressurization around the freezing point. (C) 2015 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordGas Hydrate Porous Media Depressurization Numerical Simulation Freezing Point
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.fuel.2015.07.048
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordQILIAN MOUNTAIN PERMAFROST ; ETHYLENE-GLYCOL INJECTION ; GAS-PRODUCTION ; NATURAL-GAS ; THERMAL-STIMULATION ; QUIESCENT REACTOR ; HORIZONTAL WELLS ; DISSOCIATION ; SEDIMENT ; DEPOSITS
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000360006100103
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10853
Collection中国科学院广州能源研究所
Affiliation1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China
2.Chongqing Univ, Coll Resources & Environm Sci, Chongqing 400044, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Li, Bo,Liang, Yun-Pei,Li, Xiao-Sen,et al. Numerical analysis of methane hydrate decomposition experiments by depressurization around freezing point in porous media[J]. FUEL,2015,159:925-934.
APA Li, Bo,Liang, Yun-Pei,Li, Xiao-Sen,&Wu, Hui-Jie.(2015).Numerical analysis of methane hydrate decomposition experiments by depressurization around freezing point in porous media.FUEL,159,925-934.
MLA Li, Bo,et al."Numerical analysis of methane hydrate decomposition experiments by depressurization around freezing point in porous media".FUEL 159(2015):925-934.
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