Methane hydrate growth velocity in seepage system of Qiongdongnan Basin, South China Sea

CORC > 广州能源研究所 > 中国科学院广州能源研究所 > 中国科学院广州能源研究所

	Methane hydrate growth velocity in seepage system of Qiongdongnan Basin, South China Sea
	Guan Jin-An1,2 ; Fan Shuan-Shi 3; Liang De-Qing1 ; Ning Fu-Long 4
刊名	chinese journal of geophysics-chinese edition
	2009-03-01
卷号	52 期号:3 页码:765-775
关键词	Seepage system Diffusion system Methane hydrate Growth velocity Cementation velocity
ISSN号	0001-5733
其他题名	南海琼东南盆地渗漏系统甲烷水合物生长速度.pdf
通讯作者	guanja@ms.giec.ac.cn ; fanss@ms.giec.ac.cn
中文摘要	the occurrences of diapirs, gas-filled zones and gas plumes in seawater in qiongdongnan basin of south china sea indicate that there may exist seepage system gas-hydrate reservoirs. assuming there has a methane venting zone of 1500 m in diameter, and the methane flux is 1000 kmol/a, and the temperature of methane hydrate-bearing sediments ranges from 3 degrees c to 20 degrees c, then according to the hydrate film growth theory, by numerical simulation, this paper computes the temperatures and velocities in 0 mbsf, 100 mbsf, 200 mbsf, 425 mbsf over discrete length, and gives the change charts. the results show that the cementation velocity in sediments matrix of methane hydrate is about 0.2 nm/s, and the seepage system will evolve into diffusion system over probably 35000 years. meanwhile, the methane hydrate growth velocity in leakage system is 20 similar to 40 times faster than in diffusion system.
英文摘要	the occurrences of diapirs, gas-filled zones and gas plumes in seawater in qiongdongnan basin of south china sea indicate that there may exist seepage system gas-hydrate reservoirs. assuming there has a methane venting zone of 1500 m in diameter, and the methane flux is 1000 kmol/a, and the temperature of methane hydrate-bearing sediments ranges from 3 degrees c to 20 degrees c, then according to the hydrate film growth theory, by numerical simulation, this paper computes the temperatures and velocities in 0 mbsf, 100 mbsf, 200 mbsf, 425 mbsf over discrete length, and gives the change charts. the results show that the cementation velocity in sediments matrix of methane hydrate is about 0.2 nm/s, and the seepage system will evolve into diffusion system over probably 35000 years. meanwhile, the methane hydrate growth velocity in leakage system is 20 similar to 40 times faster than in diffusion system.
WOS标题词	science & technology ; physical sciences
类目[WOS]	geochemistry & geophysics
研究领域[WOS]	geochemistry & geophysics
关键词[WOS]	gas hydrate ; stability zone ; film growth ; bubbles ; water ; oregon ; margin ; ridge
收录类别	SCI
资助信息	国家自然科学基金与广东省政府基金广东联合基金项目(nsfc-u0733003);国家重点基础研究专项973项目(2009cb219504);中国科学院知识创新重要方向性项目(kzcx3一sw一224)
语种	英语
WOS记录号	WOS:000265004300020
公开日期	2010-09-16
附注	南海琼东南盆地发现的高压l’泥底辟构造、海底“气烟囱”和天然气冷泉表明该地区可能存在着渗漏系统天然气水合物藏．假定在该区直径为1500 m的甲烷渗漏区内，甲烷渗漏通量为1000 kmol／a，甲烷水合物沉积层的温度范围为3～2o℃ ，根据水合物条形移动界面理论建立传热模型，选取0 mbsf、100 mbsf、200 mbsf和425 mbsf分别计算在渗漏和扩散情况下的温度和生长速度变化曲线．结果表明甲烷水合物在沉积层骨架里的固结速度约为0．2 nm／s，经过约35000年后渗漏系统将演变成扩散系统．同时，甲烷水合物在渗漏系统里比在扩散系统里的生长速度快约2o～40倍．
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/3356]
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.S China Univ Technol, MOE, Key Lab Enhanced Heat Transfer & Energy Conservat, Guangzhou 510640, Peoples R China 4.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Guan Jin-An,Fan Shuan-Shi,Liang De-Qing,et al. Methane hydrate growth velocity in seepage system of Qiongdongnan Basin, South China Sea[J]. chinese journal of geophysics-chinese edition,2009,52(3):765-775.
APA	Guan Jin-An,Fan Shuan-Shi,Liang De-Qing,&Ning Fu-Long.(2009).Methane hydrate growth velocity in seepage system of Qiongdongnan Basin, South China Sea.chinese journal of geophysics-chinese edition,52(3),765-775.
MLA	Guan Jin-An,et al."Methane hydrate growth velocity in seepage system of Qiongdongnan Basin, South China Sea".chinese journal of geophysics-chinese edition 52.3(2009):765-775.