Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media
Natural gas hydrates have attracted much attention in recent years. It is important to investigate the effects of gas occurrence pattern on hydrate growth habits since distribution and morphology characteristics of gas hydrates have significant effects on physical properties of hydrate-bearing reser...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/33121 2023-05-15T17:12:06+02:00 Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media Kou, Xuan Li, Xiao-Sen Wang, Yi Liu, Jian-Wu Chen, Zhao-Yang 2021-07-01 http://ir.giec.ac.cn/handle/344007/33121 https://doi.org/10.1016/j.energy.2021.120401 英语 eng PERGAMON-ELSEVIER SCIENCE LTD ENERGY http://ir.giec.ac.cn/handle/344007/33121 doi:10.1016/j.energy.2021.120401 Gas hydrates Morphology characteristics Distribution Dissolved gas X-ray CT METHANE-HYDRATE BEARING SEDIMENTS THERMAL-STIMULATION DISSOLVED METHANE PORE HABIT WATER PERMEABILITY DISSOCIATION GROWTH DEPRESSURIZATION Thermodynamics Energy & Fuels 期刊论文 2021 ftchacadsciegiec https://doi.org/10.1016/j.energy.2021.120401 2022-09-23T14:17:57Z Natural gas hydrates have attracted much attention in recent years. It is important to investigate the effects of gas occurrence pattern on hydrate growth habits since distribution and morphology characteristics of gas hydrates have significant effects on physical properties of hydrate-bearing reservoirs. In this work, the differences in distribution and morphology properties of gas hydrates under two gas occurrence patterns have been analyzed via the X-ray computed tomography for the first time. Experimental results reveal direct correlations between the hydrate growth habit and the gas occurrence pattern. In the presence of free gas, grain-attaching hydrates are formed at the arc-shaped contact surface of gas and water, and mass transfer at the gas-water interface is the key controlling factor in hydrate formation process. In the presence of dissolved gas, dispersed and dendritic hydrates are formed in liquid phase as the result of gas solubility change, and gas diffusion is the crucial factor that influences the growth habit and morphology of gas hydrates during hydrate formation from dissolved gas. Besides, the maximum saturation of dendritic hydrates formed from dissolved gas is limited by the gas solubility. These conclusions are valuable in the improvement of prediction accuracy of gas production from hydrate-bearing sediments. (c) 2021 Elsevier Ltd. All rights reserved. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Energy 226 120401 |
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Open Polar |
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Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Gas hydrates Morphology characteristics Distribution Dissolved gas X-ray CT METHANE-HYDRATE BEARING SEDIMENTS THERMAL-STIMULATION DISSOLVED METHANE PORE HABIT WATER PERMEABILITY DISSOCIATION GROWTH DEPRESSURIZATION Thermodynamics Energy & Fuels |
spellingShingle |
Gas hydrates Morphology characteristics Distribution Dissolved gas X-ray CT METHANE-HYDRATE BEARING SEDIMENTS THERMAL-STIMULATION DISSOLVED METHANE PORE HABIT WATER PERMEABILITY DISSOCIATION GROWTH DEPRESSURIZATION Thermodynamics Energy & Fuels Kou, Xuan Li, Xiao-Sen Wang, Yi Liu, Jian-Wu Chen, Zhao-Yang Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
topic_facet |
Gas hydrates Morphology characteristics Distribution Dissolved gas X-ray CT METHANE-HYDRATE BEARING SEDIMENTS THERMAL-STIMULATION DISSOLVED METHANE PORE HABIT WATER PERMEABILITY DISSOCIATION GROWTH DEPRESSURIZATION Thermodynamics Energy & Fuels |
description |
Natural gas hydrates have attracted much attention in recent years. It is important to investigate the effects of gas occurrence pattern on hydrate growth habits since distribution and morphology characteristics of gas hydrates have significant effects on physical properties of hydrate-bearing reservoirs. In this work, the differences in distribution and morphology properties of gas hydrates under two gas occurrence patterns have been analyzed via the X-ray computed tomography for the first time. Experimental results reveal direct correlations between the hydrate growth habit and the gas occurrence pattern. In the presence of free gas, grain-attaching hydrates are formed at the arc-shaped contact surface of gas and water, and mass transfer at the gas-water interface is the key controlling factor in hydrate formation process. In the presence of dissolved gas, dispersed and dendritic hydrates are formed in liquid phase as the result of gas solubility change, and gas diffusion is the crucial factor that influences the growth habit and morphology of gas hydrates during hydrate formation from dissolved gas. Besides, the maximum saturation of dendritic hydrates formed from dissolved gas is limited by the gas solubility. These conclusions are valuable in the improvement of prediction accuracy of gas production from hydrate-bearing sediments. (c) 2021 Elsevier Ltd. All rights reserved. |
format |
Report |
author |
Kou, Xuan Li, Xiao-Sen Wang, Yi Liu, Jian-Wu Chen, Zhao-Yang |
author_facet |
Kou, Xuan Li, Xiao-Sen Wang, Yi Liu, Jian-Wu Chen, Zhao-Yang |
author_sort |
Kou, Xuan |
title |
Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
title_short |
Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
title_full |
Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
title_fullStr |
Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
title_full_unstemmed |
Effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
title_sort |
effects of gas occurrence pattern on distribution and morphology characteristics of gas hydrates in porous media |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2021 |
url |
http://ir.giec.ac.cn/handle/344007/33121 https://doi.org/10.1016/j.energy.2021.120401 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
ENERGY http://ir.giec.ac.cn/handle/344007/33121 doi:10.1016/j.energy.2021.120401 |
op_doi |
https://doi.org/10.1016/j.energy.2021.120401 |
container_title |
Energy |
container_volume |
226 |
container_start_page |
120401 |
_version_ |
1766068870557204480 |