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A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption
Liu LL; Lu XB(鲁晓兵); Zhang XH(张旭辉); Liu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China.
Source PublicationJOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
2015-09
Volume133Pages:589-601
ISSN0920-4105
AbstractSpatial distribution of gas hydrate dissociation is essential in analyzing gas recovery and related potential hazards. This work develops a 1D model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating in the clay-silty sediments. Without assuming a discontinuous interface and a sudden decrease of pressure, the sediment is divided into a dissociated zone, a dissociating zone, and an undissociated zone. The dissociating zone is further separated into a heating subzone and a non-heating subzone. This work finds that (i) the thicknesses of the dissociating zone and the heating subzone as well as the propagation distance of the hydrate dissociation front are all linear with the square root of time, and the square root of hydrate dissociation time at any location is also linear with the distance between the location and the production well; (ii) the expansion velocity of the dissociating zone is about ninety times faster than that of the heating subzone, and a higher absolute permeability causes a faster expansion velocity of the dissociating zone, but barely affects the expansion velocity of the heating subzone; and (iii) the thickness of the heating subzone is less than 5% of the thickness of the dissociating zone in the latter stage of the hydrate dissociation process. (C) 2015 Elsevier B.V. All rights reserved.
KeywordGas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating
DOI10.1016/j.petrol.2015.07.005
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000365253300057
WOS KeywordSOUTH CHINA SEA ; METHANE HYDRATE ; POROUS-MEDIA ; SHENHU AREA ; DECOMPOSITION ; DEPOSITS ; ENERGY ; SIMULATION ; WELL
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Petroleum
Funding OrganizationWe thank Zheng Zhemin and Tan Qingming for technical assistance. Funding of this work has been provided by the National Natural Science Foundation of China (Nos. 11402131, 11272314, and 41376078). Their support is gratefully acknowledged.
DepartmentLMFS海洋土力学(LHO)
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58380
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China.
Recommended Citation
GB/T 7714
Liu LL,Lu XB,Zhang XH,et al. A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2015,133:589-601.
APA Liu LL,鲁晓兵,张旭辉,&Liu, LL .(2015).A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,133,589-601.
MLA Liu LL,et al."A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 133(2015):589-601.
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