摘要
浅剖资料包含丰富的海底浅表层信息。基于南海某海域浅剖资料,分别从垂向和平面两个角度对浅剖资料进行数据挖掘。垂向角度,提取浅剖的振幅包络能清晰揭示海底浅层构造和声学异常;对包络拓频处理能清晰刻画砂体细微变化及地层层序划分;对浅剖PHF高频数据突出其海底以上弱信号可用于观测气体逸散的异常反射。平面角度,提取浅剖资料海底表层均方根振幅并绘制等值线图,展示海底底质的宏观变化特征。实际资料证明,挖掘出的这四种浅剖成果资料能满足目前浅剖综合解释需求。
The sub -bottom profile contain abundant seafloot information. According to the requirement of interpretation personnel, how to fully utilize sub bottom profile data is of great significance. A sub bottom profile data in the south China sea was selected as the research object, mining data ftom the angle of vertical and horizontal in this paper. Vertical Angle, the sub bottom profile amplitude envelope can clearly reveal the sub bottom structure and acoustic anomaly. The envelope fre- quency extensiona can clearly depict sand body changes and stratigraphic sequence division. Highlight the weak signal of the sub bottom PHF data can be used to observe the seafloot gas dissipation and abnormal reflection. Horizontal Angle, draw contour map by extracting the RMS amplitude of the seafloot surface and analysis the macroscopic characteristics of the seabed sediment in the study area. Actual data show that the four sub bottom result data can meet the current integrated interpreta- tion requirements.
作者
刘玉萍
杨志成
李福元
李丽青
张宝金
LIU Yuping;YANG Zhicheng;LI Fuyuan;LI Liqing;ZHANG Baojin(MLR Key Laboratory of Marine Mineral Resources,Guangzhou Marine Geological Survey,Guangzhou 510075,China;Bohai Oilfield Research Institute,Tianjin Branch,CNOOC Limited,Tianjin 300452,China)
出处
《物探化探计算技术》
CAS
CSCD
2018年第4期440-446,共7页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
数据挖掘
浅剖资料
振幅包络
拓频处理
等值线
data mining
sub bottom profile data
amplitude envelope
frequency -broadening processing
contour line
