| 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.
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| Source Publication | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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| 2015-09 | |
| Volume | 133Pages:589-601 |
| ISSN | 0920-4105 |
| Abstract | Spatial 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. |
| Keyword | Gas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating |
| DOI | 10.1016/j.petrol.2015.07.005 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000365253300057 |
| WOS Keyword | SOUTH CHINA SEA ; METHANE HYDRATE ; POROUS-MEDIA ; SHENHU AREA ; DECOMPOSITION ; DEPOSITS ; ENERGY ; SIMULATION ; WELL |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Petroleum |
| Funding Organization | We 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. |
| Department | LMFS海洋土力学(LHO) |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/58380 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Liu, 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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| J2015-027.pdf（2540KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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