Application of marine geophysical survey techniques to offshore geological survey before the drilling engineering
Pre-geological survey is essentially important to marine engineering constructing and determines the safety of the offshore operation.In this paper,the overall geological information for the aimed area should be obtained before the drilling platform was in position,so as to avoiding the existing geo-hazards while drilling.To address the problem,an integrated marine geological and geophysical survey was carried out by using echo sounding system,side-scan sonar system,sub-bottom profiling system and single channel and seismic streamer.The survey area was around a scheduled site in the South of China Sea,at which a certain survey well was designed in advance,and covering an area of about 1km2.24 geophysical survey lines were designed in this survey,including 21 main lines and 3 tie lines.After the data processing and analyzed,some potential geo-hazards,including a lot of sand waves,some patches and a paleo-river,were observed in the survey area.All of them might result in the inhomogeneous sinking of sediments and pose a serious threat to the coming offshore drilling,therefore,it should be paid more attentions on them.
offshore drilling geological survey potential geo-hazards
Zhenang Cui Zhichang Zheng Jinqing Lin Shengzhong Ma Yaohong Shi Taihao Chen
Guangzhou Marine Geological Survey,Guangzhou 510760,China
国际会议
The 3rd International Conference on Environmental and Engineering Geophysics(第三届环境与工程地球物理国际会议)
武汉
英文
215-218
2008-06-15（万方平台首次上网日期，不代表论文的发表时间）