Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea | |
Li Xishuang1,2; Liu Baohua3; Liu Lejun1; Zheng Jiewen1; Zhou Songwang4; Zhou Qingjie1 | |
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/handle/2SI8HI0U/3034] |
专题 | 业务部门_海洋地质与地球物理研究室 |
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. |
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