Permeability measurement and discovery of dissociation process of hydrate sediments
The study on the permeability of methane hydrates in fine quartz sands contributes to the accurate prediction of gas/water production and can effectively express the characteristics of fluid migration. In this study, the water effective permeability (k(w)) of methane hydrates in three fine quartz sa...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/26397 2023-05-15T17:12:07+02:00 Permeability measurement and discovery of dissociation process of hydrate sediments Shen, Pengfei Li, Gang Li, Bo Li, Xiaosen Liang, Yunpei Lv, Qiunan 2020-03-01 http://ir.giec.ac.cn/handle/344007/26396 http://ir.giec.ac.cn/handle/344007/26397 https://doi.org/10.1016/j.jngse.2020.103155 英语 eng ELSEVIER SCI LTD JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING http://ir.giec.ac.cn/handle/344007/26396 http://ir.giec.ac.cn/handle/344007/26397 doi:10.1016/j.jngse.2020.103155 Methane hydrates Permeability Dissociation Saturation Reduction model METHANE-HYDRATE RELATIVE PERMEABILITY POROUS-MEDIA GAS-PRODUCTION NATURAL-GAS WATER CH4 DEPRESSURIZATION PERMAFROST Energy & Fuels Engineering Chemical 期刊论文 2020 ftchacadsciegiec https://doi.org/10.1016/j.jngse.2020.103155 2022-09-23T14:15:39Z The study on the permeability of methane hydrates in fine quartz sands contributes to the accurate prediction of gas/water production and can effectively express the characteristics of fluid migration. In this study, the water effective permeability (k(w)) of methane hydrates in three fine quartz sands containing various hydrate saturation (S-H) were carried out under steady water injection and production. Experimental results indicated that the effect of particle sizes on k(w) was significant even though the difference in the average particle size of three fine quartz sands was relatively limited. The differential pressure of the hydrate sediments was completely recorded during permeability measurement, and the stabilization and decomposition process of hydrate could be clearly represented by differential pressure. The k(w) increased rapidly with the decomposition of hydrate and the appearance of flow channel in the hydrate sediments. Hydrate dissociation process was recorded in situ by Cold Field Emission Scanning Electron Microscopy (CFE-SEM), the dissociation of hydrates in pore space was clearly visible, and the hydrates in pore space were first dissociated into many small regions. A new reduction model between water relative permeability (k(rw)) and S-H was proposed on the basis of experimental results, and the experimental data fitted well with hydrates occupying pore centers. The effect of particle sizes on k(rw) was eliminated, the Archie saturation exponent n tended to increase with the increase of S-H, and n was recommended between 20 and 30. Report Methane hydrate permafrost Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Journal of Natural Gas Science and Engineering 75 103155 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Methane hydrates Permeability Dissociation Saturation Reduction model METHANE-HYDRATE RELATIVE PERMEABILITY POROUS-MEDIA GAS-PRODUCTION NATURAL-GAS WATER CH4 DEPRESSURIZATION PERMAFROST Energy & Fuels Engineering Chemical |
spellingShingle |
Methane hydrates Permeability Dissociation Saturation Reduction model METHANE-HYDRATE RELATIVE PERMEABILITY POROUS-MEDIA GAS-PRODUCTION NATURAL-GAS WATER CH4 DEPRESSURIZATION PERMAFROST Energy & Fuels Engineering Chemical Shen, Pengfei Li, Gang Li, Bo Li, Xiaosen Liang, Yunpei Lv, Qiunan Permeability measurement and discovery of dissociation process of hydrate sediments |
topic_facet |
Methane hydrates Permeability Dissociation Saturation Reduction model METHANE-HYDRATE RELATIVE PERMEABILITY POROUS-MEDIA GAS-PRODUCTION NATURAL-GAS WATER CH4 DEPRESSURIZATION PERMAFROST Energy & Fuels Engineering Chemical |
description |
The study on the permeability of methane hydrates in fine quartz sands contributes to the accurate prediction of gas/water production and can effectively express the characteristics of fluid migration. In this study, the water effective permeability (k(w)) of methane hydrates in three fine quartz sands containing various hydrate saturation (S-H) were carried out under steady water injection and production. Experimental results indicated that the effect of particle sizes on k(w) was significant even though the difference in the average particle size of three fine quartz sands was relatively limited. The differential pressure of the hydrate sediments was completely recorded during permeability measurement, and the stabilization and decomposition process of hydrate could be clearly represented by differential pressure. The k(w) increased rapidly with the decomposition of hydrate and the appearance of flow channel in the hydrate sediments. Hydrate dissociation process was recorded in situ by Cold Field Emission Scanning Electron Microscopy (CFE-SEM), the dissociation of hydrates in pore space was clearly visible, and the hydrates in pore space were first dissociated into many small regions. A new reduction model between water relative permeability (k(rw)) and S-H was proposed on the basis of experimental results, and the experimental data fitted well with hydrates occupying pore centers. The effect of particle sizes on k(rw) was eliminated, the Archie saturation exponent n tended to increase with the increase of S-H, and n was recommended between 20 and 30. |
format |
Report |
author |
Shen, Pengfei Li, Gang Li, Bo Li, Xiaosen Liang, Yunpei Lv, Qiunan |
author_facet |
Shen, Pengfei Li, Gang Li, Bo Li, Xiaosen Liang, Yunpei Lv, Qiunan |
author_sort |
Shen, Pengfei |
title |
Permeability measurement and discovery of dissociation process of hydrate sediments |
title_short |
Permeability measurement and discovery of dissociation process of hydrate sediments |
title_full |
Permeability measurement and discovery of dissociation process of hydrate sediments |
title_fullStr |
Permeability measurement and discovery of dissociation process of hydrate sediments |
title_full_unstemmed |
Permeability measurement and discovery of dissociation process of hydrate sediments |
title_sort |
permeability measurement and discovery of dissociation process of hydrate sediments |
publisher |
ELSEVIER SCI LTD |
publishDate |
2020 |
url |
http://ir.giec.ac.cn/handle/344007/26396 http://ir.giec.ac.cn/handle/344007/26397 https://doi.org/10.1016/j.jngse.2020.103155 |
genre |
Methane hydrate permafrost |
genre_facet |
Methane hydrate permafrost |
op_relation |
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING http://ir.giec.ac.cn/handle/344007/26396 http://ir.giec.ac.cn/handle/344007/26397 doi:10.1016/j.jngse.2020.103155 |
op_doi |
https://doi.org/10.1016/j.jngse.2020.103155 |
container_title |
Journal of Natural Gas Science and Engineering |
container_volume |
75 |
container_start_page |
103155 |
_version_ |
1766068902733807616 |