Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates

doi:10.3390/en10010145

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	Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates
	Tang, Cuiping1,2,3,4 ; Zhao, Xiangyong1,2,3,4 ; Li, Dongliang1,2,3,4 ; He, Yong 1,2,3,4; Shen, Xiaodong 1,2,3,4; Liang, Deqing1,2,3,4
刊名	ENERGIES
	2017
卷号	10 期号:1
关键词	Natural Gas Hydrate Flow Assurance Slurry Sludge Flow Characteristics
ISSN号	1996-1073
DOI	10.3390/en10010145
文献子类	Article
英文摘要	Gas hydrate blockage in pipelines during offshore production becomes a major problem with increasing water depth. In this work, a series of experiments on gas hydrate formation in a flow loop was performed with low flow rates of 0.33, 0.66, and 0.88 m/s; the effects of the initial subcooling, flow rate, pressure, and morphology were investigated for methane hydrate formation in the flow loop. The results indicate that the differential pressure drop (Delta P) across two ends of the horizontal straight pipe increases with increasing hydrate concentration at the early stage of gas hydrate formation. When the flow rates of hydrate fluid are low, the higher the subcooling is, the faster the transition of the hydrates macrostructures. Gas hydrates can agglomerate, and sludge hydrates appear at subcoolings of 6.5 and 8.5 degrees C. The difference between the Delta P values at different flow rates is small, and there is no obvious influence of the flow rates on Delta P. Three hydrate macrostructures were observed: slurry-like, sludge-like, and their transition. When the initial pressure is 8.0 MPa, large methane hydrate blockages appear at the gas hydrate concentration of approximately 7%. Based on the gas-liquid two-phase flow model, a correlation between the gas hydrate concentration and the value of Delta P is also presented. These results can enrich the kinetic data of gas hydrate formation and agglomeration and provide guidance for oil and gas transportation in pipelines.
WOS关键词	WATER CUT SYSTEMS ; GAS HYDRATE ; ICE-SLURRY ; CRUDE-OIL ; INHIBITORS ; VISCOSITY ; EMULSION ; LOOP ; MODEL
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000392422500144
资助机构	National Natural Science Foundation of China(50906087)
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/14017]
专题	中国科学院广州能源研究所天然气水合物基础研究实验室
通讯作者	Liang, Deqing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Tang, Cuiping,Zhao, Xiangyong,Li, Dongliang,et al. Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates[J]. ENERGIES,2017,10(1).
APA	Tang, Cuiping,Zhao, Xiangyong,Li, Dongliang,He, Yong,Shen, Xiaodong,&Liang, Deqing.(2017).Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates.ENERGIES,10(1).
MLA	Tang, Cuiping,et al."Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates".ENERGIES 10.1(2017).