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A pilot-scale study of gas production from hydrate deposits with two-spot horizontal well system
Li, Bo1,2; Liang, Yun-Pei1,2; Li, Xiao-Sen3; Zhou, Lei1,2
2016-08-15
Source PublicationAPPLIED ENERGY
Volume176Pages:12-21
AbstractThe hydrate dissociation and gas production behaviors are investigated in a pilot-scale hydrate simulator (PHS) using a novel two-spot horizontal well system through experimental and numerical simulations. There are two horizontal wells located in the same symmetrical plane of the cylindrical reactor. Gas and water are produced from the lower well under depressurization, while hot water with the temperature of 80.0 degrees C is injected into the PHS from the upper one at a constant rate of 50 mL/min. Both the experimental and numerical results show that nearly all the produced gas is originated from hydrate dissociation, and the initial free gas in the vessel contributes little to the final gas production. The injected hot water is more likely to flow downwards under the gravity effect and be produced from the lower well, and hydrate dissociation is mainly stimulated by the heat conduction in the reactor. Two irregular dissociation interfaces are observed to surround the hydrate undissociated areas. One interface expands from the upper well, while the other one shrinks from the boundaries. The results of the gas-to-water ratio and the obtained net energy indicate that it is commercially feasible for hydrate exploitation using this kind of well design. In addition, it is found that the production efficiency of the system is strongly dependent on the initial hydrate saturation and the hot water injection rate. (C) 2016 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordGas Hydrate Horizontal Well Depressurization Thermal Stimulation Numerical Simulation
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2016.05.061
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordQILIAN MOUNTAIN PERMAFROST ; QINGHAI-TIBET PLATEAU ; METHANE HYDRATE ; POROUS-MEDIA ; NATURAL-GAS ; THERMAL-STIMULATION ; PUFF METHOD ; NUMERICAL-SIMULATION ; VERTICAL WELL ; HEAT-TRANSFER
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000378969500002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11778
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. A pilot-scale study of gas production from hydrate deposits with two-spot horizontal well system[J]. APPLIED ENERGY,2016,176:12-21.
APA Li, Bo,Liang, Yun-Pei,Li, Xiao-Sen,&Zhou, Lei.(2016).A pilot-scale study of gas production from hydrate deposits with two-spot horizontal well system.APPLIED ENERGY,176,12-21.
MLA Li, Bo,et al."A pilot-scale study of gas production from hydrate deposits with two-spot horizontal well system".APPLIED ENERGY 176(2016):12-21.
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