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

LI Xishuang; LIU Baohua; LIU Lejun; ZHENG Jiewen; ZHOU Songwang; ZHOU Qingjie

首页> 中文期刊> 《中国海洋大学学报：英文版》 >Prediction for Potential Landslide Zones Using Seismic Amplitude in Liwan Gas Field, Northern South China Sea

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

开具论文收录证明 >>

期刊封面封底目录下载 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The Liwan(Lw) gas field located in the northern slope of the South China Sea(SCS) is extremely complex for its seafloor 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? 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.

著录项

来源
《中国海洋大学学报：英文版》 |2017年第6期|1035-1042|共8页
作者
LI Xishuang; LIU Baohua; LIU Lejun; ZHENG Jiewen; ZHOU Songwang; ZHOU Qingjie;
展开▼
作者单位

First Institute of Oceanography;

State Oceanic Administrator;

Qingdao 266061;

P. R. China;

Laboratory for Marine Mineral Resources;

Qingdao National Laboratory for Marine Science and Technology;

Qingdao 266071;

P. R. China;

National Deep Sea Center;

Qingdao 266237;

P. R. China;

Survey Center of China Oilfield Services Limited;

Tianjin 300451;

P. R. China;

展开▼
原文格式 PDF
正文语种 chi
中图分类海洋学;
关键词
seismic; amplitude; acoustic; impedance; shear; strength; slope; stability; analysis; northern; South; China; Sea;

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

摘要

著录项

相关主题

期刊订阅