The methane hydrate formation and the resource estimate resulting from free gas migration in seeping seafloor hydrate stability zone

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	The methane hydrate formation and the resource estimate resulting from free gas migration in seeping seafloor hydrate stability zone
	Guan, Jinan 1,2,3; Liang, Deqing 1,3; Wu, Nengyou 1,3; Fan, Shuanshi 3
刊名	journal of asian earth sciences
	2009-10-18
卷号	36 期号:4-5 页码:277-288
关键词	Free gas Methane hydrate Volume fraction Methane flux Formation
ISSN号	1367-9120
通讯作者	liangdq@ms.giec.ac.cn
中文摘要	it is a typical multiphase flow process for hydrate formation in seeping seafloor sediments. free gas can not only be present but also take part in formation of hydrate. the volume fraction of free gas in local pore of hydrate stable zone (hsz) influences the formation of hydrate in seeping seafloor area, and methane flux determines the abundance and resource of hydrate-bearing reservoirs. in this paper, a multiphase flow model including water (dissolved methane and salt)-free gas hydrate has been established to describe this kind of flow-transfer-reaction process where there exists a large scale of free gas migration and transform in seafloor pore. in the order of three different scenarios, the conversions among permeability, capillary pressure, phase saturations and salinity along with the formation of hydrate have been deducted. furthermore, the influence of four sorts of free gas saturations and three classes of methane fluxes on hydrate formation and the resource has also been analyzed and compared. based on the rules drawn from the simulation, and combined information gotten from drills in field, the methane hydrate(mh) formation in shenhu area of south china sea has been forecasted. it has been speculated that there may breed a moderate methane flux below this seafloor hsz. if the flux is about 0.5 kg m-2 a-1, then it will go on to evolve about 2700 ka until the hydrate saturation in pore will arrive its peak (about 75%). approximately 1.47 109 m3 mh has been reckoned in this marine basin finally, is about 13 times over preliminary estimate.
英文摘要	it is a typical multiphase flow process for hydrate formation in seeping seafloor sediments. free gas can not only be present but also take part in formation of hydrate. the volume fraction of free gas in local pore of hydrate stable zone (hsz) influences the formation of hydrate in seeping seafloor area, and methane flux determines the abundance and resource of hydrate-bearing reservoirs. in this paper, a multiphase flow model including water (dissolved methane and salt)-free gas hydrate has been established to describe this kind of flow-transfer-reaction process where there exists a large scale of free gas migration and transform in seafloor pore. in the order of three different scenarios, the conversions among permeability, capillary pressure, phase saturations and salinity along with the formation of hydrate have been deducted. furthermore, the influence of four sorts of free gas saturations and three classes of methane fluxes on hydrate formation and the resource has also been analyzed and compared. based on the rules drawn from the simulation, and combined information gotten from drills in field, the methane hydrate(mh) formation in shenhu area of south china sea has been forecasted. it has been speculated that there may breed a moderate methane flux below this seafloor hsz. if the flux is about 0.5 kg m(-2) a(-1), then it will go on to evolve about 2700 ka until the hydrate saturation in pore will arrive its peak (about 75%). approximately 1.47 x 10(9) m(3) mh has been reckoned in this marine basin finally, is about 13 times over preliminary estimate. (c) 2009 elsevier ltd. all rights reserved.
WOS标题词	science & technology ; physical sciences
类目[WOS]	geosciences, multidisciplinary
研究领域[WOS]	geology
关键词[WOS]	bottom simulating reflectors ; gulf-of-mexico ; marine-sediments ; fluid-flow ; margin ; model ; ridge ; constraints ; clathrate ; transport
收录类别	SCI
资助信息	national basic research program-973 [2009cb219504]; nsfc-guangdong union foundation [nsfc-u0733033]; cas [msgl09-10]; acs [kgcx2-yw-805]; china university of geosciences, wuhan, china
原文出处	http://www.sciencedirect.com/science/journal/13679120
语种	英语
WOS记录号	WOS:000270622500002
公开日期	2010-09-16
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/3300]
专题	中国科学院广州能源研究所
作者单位	1.CAS, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.CAS, Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 541640, Guangdong, Peoples R China 3.CAS, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Guan, Jinan,Liang, Deqing,Wu, Nengyou,et al. The methane hydrate formation and the resource estimate resulting from free gas migration in seeping seafloor hydrate stability zone[J]. journal of asian earth sciences,2009,36(4-5):277-288.
APA	Guan, Jinan,Liang, Deqing,Wu, Nengyou,&Fan, Shuanshi.(2009).The methane hydrate formation and the resource estimate resulting from free gas migration in seeping seafloor hydrate stability zone.journal of asian earth sciences,36(4-5),277-288.
MLA	Guan, Jinan,et al."The methane hydrate formation and the resource estimate resulting from free gas migration in seeping seafloor hydrate stability zone".journal of asian earth sciences 36.4-5(2009):277-288.