Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea

doi:10.1007/s11802-017-3308-6

	Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea
	Li Xishuang 1,2; Liu Baohua 3; Liu Lejun 1; Zheng Jiewen 1; Zhou Songwang 4; Zhou Qingjie 1
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2017-12
卷号	16 期号:6 页码:1035-1042
关键词	seismic amplitude acoustic impedance shear strength slope stability analysis northern South China Sea
ISSN号	1672-5182
DOI	10.1007/s11802-017-3308-6
英文摘要	The Liwan (Lw) gas field located in the northern slope of the South China Sea (SCS) is extremely complex for its sea-floor topograghy, which is a huge challenge for the safety of subsea facilities. It is economically impractical to obtain parameters for risk assessment of slope stability through a large amount of sampling over the whole field. The linkage between soil shear strength and seabed peak amplitude derived from 2D/3D seismic data is helpful for understanding the regional slope-instability risk. In this paper, the relationships among seabed peak, acoustic impedance and shear strength of shallow soil in the study area were discussed based on statistical analysis results. We obtained a similar relationship to that obtained in other deep-water areas. There is a positive correlation between seabed peak amplitude and acoustic impedance and an exponential relationship between acoustic impedance and shear strength of sediment. The acoustic impedance is the key factor linking the seismic amplitude and shear strength. Infinite slope stability analysis results indicate the areas have a high potential of shallow landslide on slopes exceeding 15 degrees when the thickness of loose sediments exceeds 8 m in the Lw gas field. Our prediction shows that they are mainly located in the heads and walls of submarine canyons.
资助项目	China National Science and Technology Major Project[2011ZX05 056-001-02]
WOS关键词	DEBRIS FLOW IMPACT ; DEEP-WATER AREA ; SUBMARINE LANDSLIDES ; ORMEN LANGE ; ATTRIBUTES ; SATURATION ; EVOLUTION ; PIPELINES ; CANYONS ; COMPLEX
WOS研究方向	Oceanography
语种	英语
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000414791700012
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26403]
专题	自然资源部第一海洋研究所
通讯作者	Li Xishuang
作者单位	1.Inst Oceanog 1, Qingdao 266061, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 3.Natl Deep Sea Ctr, Qingdao 266237, Peoples R China 4.Survey Ctr China Oilfield Serv Ltd, Tianjin 300451, Peoples R China
推荐引用方式 GB/T 7714	Li Xishuang,Liu Baohua,Liu Lejun,et al. Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2017,16(6):1035-1042.
APA	Li Xishuang,Liu Baohua,Liu Lejun,Zheng Jiewen,Zhou Songwang,&Zhou Qingjie.(2017).Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea.JOURNAL OF OCEAN UNIVERSITY OF CHINA,16(6),1035-1042.
MLA	Li Xishuang,et al."Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea".JOURNAL OF OCEAN UNIVERSITY OF CHINA 16.6(2017):1035-1042.