Combined styles of depressurization and electrical heating for methane hydrate production
The combined styles of depressurization and electrical heating have an important influence on hydrate recovery and energy use in hydrate exploitation. However, the efficient combined styles of depressurization and electrical heating have not been achieved at present. In this work, six combined style...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/32356 2023-05-15T17:12:09+02:00 Combined styles of depressurization and electrical heating for methane hydrate production He, Juan Li, Xiaosen Chen, Zhaoyang Li, Qingping Zhang, Yu Wang, Yi Xia, Zhiming You, Changyu 2021-01-15 http://ir.giec.ac.cn/handle/344007/32355 http://ir.giec.ac.cn/handle/344007/32356 https://doi.org/10.1016/j.apenergy.2020.116112 英语 eng ELSEVIER SCI LTD APPLIED ENERGY http://ir.giec.ac.cn/handle/344007/32355 http://ir.giec.ac.cn/handle/344007/32356 doi:10.1016/j.apenergy.2020.116112 Depressurization Electrical heating Combined styles Methane hydrates Gas and water production Energy efficiency GAS-PRODUCTION POROUS-MEDIA THERMAL-STIMULATION PRODUCTION BEHAVIOR DISSOCIATION SEDIMENT WELLBORE RECOVERY HUFF Energy & Fuels Engineering Chemical 期刊论文 2021 ftchacadsciegiec https://doi.org/10.1016/j.apenergy.2020.116112 2022-09-23T14:17:44Z The combined styles of depressurization and electrical heating have an important influence on hydrate recovery and energy use in hydrate exploitation. However, the efficient combined styles of depressurization and electrical heating have not been achieved at present. In this work, six combined styles of depressurization and electrical heating were designed. In order to determine efficient combined styles, a depressurized vertical wellbore and a heated horizontal wellbore were used to model these combined styles and further to dissociate hydrate-bearing samples prepared by the excess-water method. The results showed that electrical heating should be started before depressurization. Specifically, considering hydrate saturation increase of 0.327-2.47% in the hydrate stability region, electrical heating was proposed to start at the onset of fresh hydrate formation. Subsequently, the soaking through electrical heating was performed at a pressure below the equilibrium pressure at the ambient temperature, which increased the averaged hydrate dissociation rate by 7.72%. A lower shut-in pressure for the soaking could enlarge the effective heating radius in samples to improve hydrate dissociation. During depressurization, no electrical heating reduced the averaged water production rate by 80.99% and increased energy efficiency by 18.06%. So electrical heating was proposed to stop in the temperature recovering stage, but whether it was used or not in the temperature reducing stage should depend on exploiting conditions, due to secondary hydrate formation and ice formation at a lower back pressure. This work may offer some reference on the arrangement of depressurization and electrical heating in future field tests for hydrate exploitation. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Applied Energy 282 116112 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Depressurization Electrical heating Combined styles Methane hydrates Gas and water production Energy efficiency GAS-PRODUCTION POROUS-MEDIA THERMAL-STIMULATION PRODUCTION BEHAVIOR DISSOCIATION SEDIMENT WELLBORE RECOVERY HUFF Energy & Fuels Engineering Chemical |
spellingShingle |
Depressurization Electrical heating Combined styles Methane hydrates Gas and water production Energy efficiency GAS-PRODUCTION POROUS-MEDIA THERMAL-STIMULATION PRODUCTION BEHAVIOR DISSOCIATION SEDIMENT WELLBORE RECOVERY HUFF Energy & Fuels Engineering Chemical He, Juan Li, Xiaosen Chen, Zhaoyang Li, Qingping Zhang, Yu Wang, Yi Xia, Zhiming You, Changyu Combined styles of depressurization and electrical heating for methane hydrate production |
topic_facet |
Depressurization Electrical heating Combined styles Methane hydrates Gas and water production Energy efficiency GAS-PRODUCTION POROUS-MEDIA THERMAL-STIMULATION PRODUCTION BEHAVIOR DISSOCIATION SEDIMENT WELLBORE RECOVERY HUFF Energy & Fuels Engineering Chemical |
description |
The combined styles of depressurization and electrical heating have an important influence on hydrate recovery and energy use in hydrate exploitation. However, the efficient combined styles of depressurization and electrical heating have not been achieved at present. In this work, six combined styles of depressurization and electrical heating were designed. In order to determine efficient combined styles, a depressurized vertical wellbore and a heated horizontal wellbore were used to model these combined styles and further to dissociate hydrate-bearing samples prepared by the excess-water method. The results showed that electrical heating should be started before depressurization. Specifically, considering hydrate saturation increase of 0.327-2.47% in the hydrate stability region, electrical heating was proposed to start at the onset of fresh hydrate formation. Subsequently, the soaking through electrical heating was performed at a pressure below the equilibrium pressure at the ambient temperature, which increased the averaged hydrate dissociation rate by 7.72%. A lower shut-in pressure for the soaking could enlarge the effective heating radius in samples to improve hydrate dissociation. During depressurization, no electrical heating reduced the averaged water production rate by 80.99% and increased energy efficiency by 18.06%. So electrical heating was proposed to stop in the temperature recovering stage, but whether it was used or not in the temperature reducing stage should depend on exploiting conditions, due to secondary hydrate formation and ice formation at a lower back pressure. This work may offer some reference on the arrangement of depressurization and electrical heating in future field tests for hydrate exploitation. |
format |
Report |
author |
He, Juan Li, Xiaosen Chen, Zhaoyang Li, Qingping Zhang, Yu Wang, Yi Xia, Zhiming You, Changyu |
author_facet |
He, Juan Li, Xiaosen Chen, Zhaoyang Li, Qingping Zhang, Yu Wang, Yi Xia, Zhiming You, Changyu |
author_sort |
He, Juan |
title |
Combined styles of depressurization and electrical heating for methane hydrate production |
title_short |
Combined styles of depressurization and electrical heating for methane hydrate production |
title_full |
Combined styles of depressurization and electrical heating for methane hydrate production |
title_fullStr |
Combined styles of depressurization and electrical heating for methane hydrate production |
title_full_unstemmed |
Combined styles of depressurization and electrical heating for methane hydrate production |
title_sort |
combined styles of depressurization and electrical heating for methane hydrate production |
publisher |
ELSEVIER SCI LTD |
publishDate |
2021 |
url |
http://ir.giec.ac.cn/handle/344007/32355 http://ir.giec.ac.cn/handle/344007/32356 https://doi.org/10.1016/j.apenergy.2020.116112 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
APPLIED ENERGY http://ir.giec.ac.cn/handle/344007/32355 http://ir.giec.ac.cn/handle/344007/32356 doi:10.1016/j.apenergy.2020.116112 |
op_doi |
https://doi.org/10.1016/j.apenergy.2020.116112 |
container_title |
Applied Energy |
container_volume |
282 |
container_start_page |
116112 |
_version_ |
1766068933961449472 |