A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption
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....
Published in: | Journal of Petroleum Science and Engineering |
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ftchinacadsimech:oai:dspace.imech.ac.cn:311007/58380 2023-05-15T17:12:07+02:00 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 鲁晓兵 张旭辉 Liu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China. 2015-09 http://dspace.imech.ac.cn/handle/311007/58380 https://doi.org/10.1016/j.petrol.2015.07.005 英语 eng JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Liu LL,Lu XB,Zhang XH. 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. http://dspace.imech.ac.cn/handle/311007/58380 http://dx.doi.org/10.1016/j.petrol.2015.07.005 doi:10.1016/j.petrol.2015.07.005 null Gas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating SOUTH CHINA SEA METHANE HYDRATE POROUS-MEDIA SHENHU AREA DECOMPOSITION DEPOSITS ENERGY SIMULATION WELL Energy & Fuels Engineering Petroleum 一类 期刊论文 2015 ftchinacadsimech https://doi.org/10.1016/j.petrol.2015.07.005 2022-12-19T18:22:35Z 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. Report Methane hydrate IMECH-IR (Institute of Mechanics, Chinese Academy of Sciences) Journal of Petroleum Science and Engineering 133 589 601 |
institution |
Open Polar |
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IMECH-IR (Institute of Mechanics, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadsimech |
language |
English |
topic |
Gas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating SOUTH CHINA SEA METHANE HYDRATE POROUS-MEDIA SHENHU AREA DECOMPOSITION DEPOSITS ENERGY SIMULATION WELL Energy & Fuels Engineering Petroleum 一类 |
spellingShingle |
Gas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating SOUTH CHINA SEA METHANE HYDRATE POROUS-MEDIA SHENHU AREA DECOMPOSITION DEPOSITS ENERGY SIMULATION WELL Energy & Fuels Engineering Petroleum 一类 Liu LL 鲁晓兵 张旭辉 Liu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China. A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
topic_facet |
Gas Hydrates Hydrate Dissociation Spatial Distribution Depressurization Heating SOUTH CHINA SEA METHANE HYDRATE POROUS-MEDIA SHENHU AREA DECOMPOSITION DEPOSITS ENERGY SIMULATION WELL Energy & Fuels Engineering Petroleum 一类 |
description |
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. |
format |
Report |
author |
Liu LL 鲁晓兵 张旭辉 Liu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China. |
author_facet |
Liu LL 鲁晓兵 张旭辉 Liu, LL (reprint author), Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China. |
author_sort |
Liu LL |
title |
A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
title_short |
A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
title_full |
A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
title_fullStr |
A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
title_full_unstemmed |
A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
title_sort |
theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption |
publishDate |
2015 |
url |
http://dspace.imech.ac.cn/handle/311007/58380 https://doi.org/10.1016/j.petrol.2015.07.005 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Liu LL,Lu XB,Zhang XH. 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. http://dspace.imech.ac.cn/handle/311007/58380 http://dx.doi.org/10.1016/j.petrol.2015.07.005 doi:10.1016/j.petrol.2015.07.005 |
op_rights |
null |
op_doi |
https://doi.org/10.1016/j.petrol.2015.07.005 |
container_title |
Journal of Petroleum Science and Engineering |
container_volume |
133 |
container_start_page |
589 |
op_container_end_page |
601 |
_version_ |
1766068895314083840 |