Reservoir formation damage during hydrate dissociation in sand-clay sediment from Qilian Mountain permafrost, China

doi:10.1016/j.apenergy.2020.114619

	Reservoir formation damage during hydrate dissociation in sand-clay sediment from Qilian Mountain permafrost, China
	Wang, Yi 1,2,3,4; Pan, Mengdi 2,5; Mayanna, Sathish 2; Schleicher, Anja M.2; Spangenberg, Erik 2; Schicks, Judith M.2
刊名	APPLIED ENERGY
	2020-04-01
卷号	263 页码:10
关键词	Gas hydrate Reservoir formation damage Qilian Mountain Hydrate dissociation Gas production
ISSN号	0306-2619
DOI	10.1016/j.apenergy.2020.114619
通讯作者	Wang, Yi(wangyi@ms.giec.ac.cn) ; Schicks, Judith M.(schick@gfz-potsdam.de)
英文摘要	Permeability is known as a key factor affecting the gas production effectiveness from the natural gas hydrate-bearing reservoir. We studied the permeability behavior of natural clayey sand core samples from a natural hydrate-bearing reservoir in the Qilian Mountain permafrost before and after hydrate formation, as well as after hydrate decomposition. We found a substantially lower permeability after hydrate decomposition and assumed a formation damage process involving fines mobilization, migration and deposition at pore throats. The assumption was proved by SEM analysis of the filter paper separating the sample and the end caps containing the fluid ports. The analysis showed fines trapped in the paper from the outlet side. Fines migration and resulting formation damage is known from enhanced oil recovery by low salinity water flooding, but was unexpected for hydrate decomposition. The underlying mechanism was identified by a series of different permeability tests. The results indicate that fresh water released from the hydrate dissociation causes the fines mobilization, migration and redeposition at pore throats leading to the observed permeability decrease. Obviously the large volume of released methane gas displaces the remaining saline water and separates it from the fresh water released from the hydrate. The fresh water in contact with parts of the grain framework causes the detachment of clay particles by increased electrostatic forces and clay swelling, if swellable clays are present. This is an important mechanism that has to be taken into account in the planning of gas production from low-permeability clayey hydrate-bearing formations.
资助项目	National Natural Science Foundation of China[51676190] ; Youth Innovation Promotion Association CAS[2018382] ; International S&T Cooperation Program of China[2015DFA61790] ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences[YZ201619] ; National Key Research and Development Plan of China[2016YFC0304002] ; National Key Research and Development Plan of China[2017YFC0307306] ; Youth Science and Technology Innovation Talent of Guangdong[2016TQ03Z862] ; Natural Science Foundation of Guangdong[2017A030313313] ; China Scholarship Council[201704910817]
WOS关键词	METHANE HYDRATE ; GAS-PRODUCTION ; PERMEABILITY ; QINGHAI ; VERIFICATION ; SANDSTONES ; EXCHANGE ; SYSTEM ; WELL
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000520402600055
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; International S&T Cooperation Program of China ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; National Key Research and Development Plan of China ; Youth Science and Technology Innovation Talent of Guangdong ; Natural Science Foundation of Guangdong ; China Scholarship Council
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26754]
专题	中国科学院广州能源研究所
通讯作者	Wang, Yi; Schicks, Judith M.
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 2.GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany 3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 5.Univ Potsdam, Dept Earth & Environm Sci, D-14476 Potsdam, Germany
推荐引用方式 GB/T 7714	Wang, Yi,Pan, Mengdi,Mayanna, Sathish,et al. Reservoir formation damage during hydrate dissociation in sand-clay sediment from Qilian Mountain permafrost, China[J]. APPLIED ENERGY,2020,263:10.
APA	Wang, Yi,Pan, Mengdi,Mayanna, Sathish,Schleicher, Anja M.,Spangenberg, Erik,&Schicks, Judith M..(2020).Reservoir formation damage during hydrate dissociation in sand-clay sediment from Qilian Mountain permafrost, China.APPLIED ENERGY,263,10.
MLA	Wang, Yi,et al."Reservoir formation damage during hydrate dissociation in sand-clay sediment from Qilian Mountain permafrost, China".APPLIED ENERGY 263(2020):10.