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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
发表期刊FUEL
卷号159页码:925-934
摘要The 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.
文章类型Article
关键词Gas Hydrate Porous Media Depressurization Numerical Simulation Freezing Point
WOS标题词Science & Technology ; Technology
DOI10.1016/j.fuel.2015.07.048
研究领域[WOS]Energy & Fuels ; Engineering
关键词[WOS]QILIAN MOUNTAIN PERMAFROST ; ETHYLENE-GLYCOL INJECTION ; GAS-PRODUCTION ; NATURAL-GAS ; THERMAL-STIMULATION ; QUIESCENT REACTOR ; HORIZONTAL WELLS ; DISSOCIATION ; SEDIMENT ; DEPOSITS
收录类别SCI
语种英语
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000360006100103
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10853
专题中国科学院广州能源研究所
作者单位1.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
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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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