Permeability measurement and discovery of dissociation process of hydrate sediments

doi:10.1016/j.jngse.2020.103155

	Permeability measurement and discovery of dissociation process of hydrate sediments
	Shen, Pengfei 1,2,3; Li, Gang 3; Li, Bo 1,2; Li, Xiaosen 1,2,3; Liang, Yunpei 1,2; Lv, Qiunan 3
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2020-03-01
卷号	75 页码:10
关键词	Methane hydrates Permeability Dissociation Saturation Reduction model
ISSN号	1875-5100
DOI	10.1016/j.jngse.2020.103155
通讯作者	Li, Xiaosen(lixs@ms.giec.ac.cn)
英文摘要	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.
资助项目	National Natural Science Foundation of China[51676196] ; National Natural Science Foundation of China[51736009] ; National Natural Science Foundation of China[51976228] ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences[QYZDB-SSW-JSC028] ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-JSC033] ; National Key R&D Program of China[2017YFC0307306] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2018D002]
WOS关键词	METHANE-HYDRATE ; RELATIVE PERMEABILITY ; POROUS-MEDIA ; GAS-PRODUCTION ; NATURAL-GAS ; WATER ; CH4 ; DEPRESSURIZATION ; PERMAFROST ; SATURATION
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000513158500027
资助机构	National Natural Science Foundation of China ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; Special Project for Marine Economy Development of Guangdong Province
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26396]
专题	中国科学院广州能源研究所
通讯作者	Li, Xiaosen
作者单位	1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 2.Chongqing Univ, Sch Resources & Safety Engn, Chongqing 400044, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Shen, Pengfei,Li, Gang,Li, Bo,et al. Permeability measurement and discovery of dissociation process of hydrate sediments[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2020,75:10.
APA	Shen, Pengfei,Li, Gang,Li, Bo,Li, Xiaosen,Liang, Yunpei,&Lv, Qiunan.(2020).Permeability measurement and discovery of dissociation process of hydrate sediments.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,75,10.
MLA	Shen, Pengfei,et al."Permeability measurement and discovery of dissociation process of hydrate sediments".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 75(2020):10.