Experimental study on the influence of brine concentration on the dissociation characteristics of methane hydrate

doi:10.1016/j.jngse.2022.104492

GIEC OpenIR

	Experimental study on the influence of brine concentration on the dissociation characteristics of methane hydrate
	Zeng, Haopeng 1,2,3; Zhang, Yu 1,2; Li, Xiaosen 1,2; Chen, Chang 1,2,3; Zhang, Lei 1,2,3; Chen, Zhaoyang 1,2
	2022-04-01
发表期刊	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
ISSN	1875-5100
卷号	100 页码:11
通讯作者	Li, Xiaosen(lixs@ms.giec.ac.cn)
摘要	Brine stimulation is a common method for assisting depressurization to produce hydrate, which significantly improves the efficiency of hydrate production. In this work, to study the influence of brine concentration on the natural gas hydrate production process, a novel cylindrical hydrate production simulation experimental device was established, and investigations of hydrate dissociation experiments induced by depressurization in conjunction with brine injection were carried out. The effects of different brine concentrations on the gas production rate and heat transfer during production were studied. The distribution, flow, and concentration evolution of brine during hydrate production were analyzed. Brine injection can significantly enhance cumulative gas production during the depressurization stage, increase the sensible heat for hydrate dissociation, enhance heat transfer between the hydrate reservoir and the environment during the recovery process, and significantly improve the gas production rate of hydrate. The increase in the gas production rate caused by brine injection mainly occurs at the end of the depressurization stage and the beginning of the constant pressure stage. The injected brine is mainly located in the middle and upper areas of the reactor. In the bottom area of the reactor, the hydrate has higher saturation and longer dissociation time, which is slightly affected by the injected brine. A higher hydrate saturation is not beneficial to brine injection and does not promote hydrate dissociation. Additionally, in the experiments with brine injection, the resistance decreases more obviously during the depressurization stage due to more hydrate dissociation. The resistance also shows that in the bottom area of the reactor, there is a higher hydrate saturation and a lower brine effect on hydrate.
关键词	Methane hydrate Depressurization Brine concentration Gas production
DOI	10.1016/j.jngse.2022.104492
关键词[WOS]	NATURAL-GAS HYDRATE ; THERMAL-STIMULATION ; DEPRESSURIZATION ; CONJUNCTION ; SIMULATION ; SEDIMENT ; RECOVERY ; BEHAVIOR ; ENERGY ; NACL
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52076208] ; National Natural Science Foundation of China[51736009] ; Special Project for Marine Eco-nomic Development of Guangdong Province[GDME-2018D002] ; Guangdong Special Support Program[2019BT02L278]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; Special Project for Marine Eco-nomic Development of Guangdong Province ; Guangdong Special Support Program
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000783947700001
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36105
通讯作者	Li, Xiaosen
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 10083, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Haopeng,Zhang, Yu,Li, Xiaosen,et al. Experimental study on the influence of brine concentration on the dissociation characteristics of methane hydrate[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2022,100:11.
APA	Zeng, Haopeng,Zhang, Yu,Li, Xiaosen,Chen, Chang,Zhang, Lei,&Chen, Zhaoyang.(2022).Experimental study on the influence of brine concentration on the dissociation characteristics of methane hydrate.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,100,11.
MLA	Zeng, Haopeng,et al."Experimental study on the influence of brine concentration on the dissociation characteristics of methane hydrate".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 100(2022):11.