Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir

doi:10.3390/e24060765

GIEC OpenIR

	Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir
	Zeng, Haopeng 1,2,3; Zhang, Yu1,2 ; Zhang, Lei 1,2,3; Chen, Zhaoyang 1,2; Li, Xiaosen1,2
	2022-06-01
发表期刊	ENTROPY
卷号	24 期号:6 页码:16
通讯作者	Zhang, Yu(zhangyu1@ms.giec.ac.cn) ; Li, Xiaosen(lixs@ms.giec.ac.cn)
摘要	Depressurization combined with brine injection is a potential method for field production of natural gas hydrate, which can significantly improve production efficiency and avoid secondary formation of hydrate. In this work, the experiments of hydrate production using depressurization combined with brine injection from a simulated excess-water hydrate reservoir were performed, and the effects of NaCl concentration on hydrate decomposition, temperature change, and heat transfer in the reservoir were investigated. The experimental results indicate that there is little gas production during depressurization in a excess-water hydrate reservoir, and the gas dissociated from hydrate is trapped in pores of sediments. The high-water production reduces the final gas recovery, which is lower than 70% in the experiments. The increasing NaCl concentration only effectively promotes gas production rate in the early stage. The final cumulative gas production and average gas production rate have little difference in different experiments. The NaCl concentration of the produced water is significantly higher than that which is in contact with hydrate in the sediments because the water produced by hydrate decomposition exists on the surface of undissociated hydrate. The high concentration of NaCl in the produced water from the reactor significantly reduces the promoting effect and efficiency of NaCl solution on hydrate decomposition. The injection of NaCl solution decreases the lowest temperature in sediments during hydrate production, and increases the sensible heat and heat transfer from environment for hydrate decomposition. The changes of temperature and resistance effectively reflect the distribution of the injected NaCl solution in the hydrate reservoir.
关键词	methane hydrate depressurization NaCl concentration gas production excess-water
DOI	10.3390/e24060765
关键词[WOS]	NATURAL-GAS HYDRATE ; METHANE HYDRATE ; THERMAL-STIMULATION ; DISSOCIATION ; DECOMPOSITION ; TECHNOLOGY ; SEDIMENTS ; HEAT
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] ; Guangdong Special Support Program[2019BT02L278] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2020D044] ; Science and Technology Program of Guangzhou[20202102080159] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515010835]
WOS研究方向	Physics
项目资助者	National Natural Science Foundation of China ; Guangdong Special Support Program ; Special Project for Marine Economy Development of Guangdong Province ; Science and Technology Program of Guangzhou ; Guangdong Basic and Applied Basic Research Foundation
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000816156500001
出版者	MDPI
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36920
专题	中国科学院广州能源研究所
通讯作者	Zhang, Yu; 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 100083, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zeng, Haopeng,Zhang, Yu,Zhang, Lei,et al. Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir[J]. ENTROPY,2022,24(6):16.
APA	Zeng, Haopeng,Zhang, Yu,Zhang, Lei,Chen, Zhaoyang,&Li, Xiaosen.(2022).Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir.ENTROPY,24(6),16.
MLA	Zeng, Haopeng,et al."Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir".ENTROPY 24.6(2022):16.