Experimental studies on the P-T stability conditions and influencing;factors of gas hydrate in different systems

doi:10.1007/s11430-012-4564-3

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局青岛海洋地质研究所

	Experimental studies on the P-T stability conditions and influencing;factors of gas hydrate in different systems
	Liu ChangLing 1; Ye YuGuang 1; Sun ShiCai 2; Chen Qiang 1; Meng QingGuo 1; Hu GaoWei 1
刊名	SCIENCE CHINA-EARTH SCIENCES
	2013
卷号	56 期号:4 页码:594-600
关键词	pore water silica sand methane hydrate sediment from South China Sea P-T stability conditions
ISSN号	1674-7313
DOI	10.1007/s11430-012-4564-3
英文摘要	The P-T stability conditions of gas hydrate in different systems (i.e., solution, silica sand, and marine sediment) were studied using multi-step decomposition method with our experimental equipment. The effects of different ions with various concentrations and sediment grains on the P-T stability conditions of gas hydrate were investigated. The results show that different ions have different influences on the phase equilibrium of gas hydrate. However, the influence of ions is in a similar trend: the larger the concentration, the bigger the P-T curve shifts to the left. For the silica sand, the influence of pore capillarity of coarse particles (> 460 mu m) can be negligible. The P-T curve measured in coarse silica is in agreement with that in pure water. However, the influence of pore capillarity of fine particles (< 35 mu m) is significant. The maximum reduction value of temperature is 1.5 K for methane hydrate under stable state. The sediment from the South China Sea significantly affects the P-T stability conditions of methane hydrate, with an average reduction value of 1.9 K within the experimental conditions. This is mainly the result of both the pore water salinity and the pore capillarity of sediment. Because the pore water salinity is keeping diluted by the fresh water released from hydrate dissociation, the measured P-T stability points fall on different P-T curves with the decreasing salinity.
学科主题	油气地质
WOS关键词	PORE-SIZE DISTRIBUTIONS ; METHANE HYDRATE ; CARBON-DIOXIDE ; CLATHRATE ; HYDRATE ; DISSOCIATION CONDITIONS ; PHASE-EQUILIBRIUM ; MARINE-SEDIMENTS ; HIGH-PRESSURE ; POROUS-MEDIA ; SILICA-GELS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000317347200010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39941]
专题	中国地质调查局青岛海洋地质研究所
作者单位	1.Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China. 2.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China. 3.Shandong Univ Sci & Technol, Coll Civil Engn & Architecture, Qingdao 266510, Peoples R China.
推荐引用方式 GB/T 7714	Liu ChangLing,Ye YuGuang,Sun ShiCai,et al. Experimental studies on the P-T stability conditions and influencing;factors of gas hydrate in different systems[J]. SCIENCE CHINA-EARTH SCIENCES,2013,56(4):594-600.
APA	Liu ChangLing,Ye YuGuang,Sun ShiCai,Chen Qiang,Meng QingGuo,&Hu GaoWei.(2013).Experimental studies on the P-T stability conditions and influencing;factors of gas hydrate in different systems.SCIENCE CHINA-EARTH SCIENCES,56(4),594-600.
MLA	Liu ChangLing,et al."Experimental studies on the P-T stability conditions and influencing;factors of gas hydrate in different systems".SCIENCE CHINA-EARTH SCIENCES 56.4(2013):594-600.