应用同步挤压小波变换去除面波  

Surface wave removal with synchrosqueezing wavelet transform

作　　者：刘晗[1] 张建中[1] 黄忠来[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《石油地球物理勘探》2016年第1期71-79,19,共9页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目(41074077,41230318);高等学校博士学科点专项科研基金资助课题(20130132110023)资助

摘　　要：同步挤压小波变换(SWT)是一种新的连续可逆时频分析方法,具有较高的时间和频率分辨率,利用该变换可去除地震资料中的面波。将时间域地震记录变换到时频域,在时频域准确识别面波区域并切除,再将切除面波后时频域信号反变换到时间域,就得到去除了面波的地震记录。理论模型合成数据和实测资料的处理结果表明:该变换可以有效去除面波而不损失有效反射波,且效果优于连续小波变换、S变换和f-k滤波等方法。Synchrosqueezing wavelet transform(SWT)is a new method for continuous and invertible timefrequency analysis with high temporal and spatial resolution.In this paper,we apply the SWT to remove surface waves from seismic data.First seismic data in the time domain are transformed into that in the time-frequency domain with the SWT.Then surface waves are separated from reflection waves in the time-frequency domain.After surface wave removal,reflection waves in the time-frequency domain are transformed back into that in the time domain,and seismic data without surface waves are finally obtained.Tests on theoretical model and real data shows that the proposed approach can remove surface waves from seismic data without losing signals,and that it seem better than continuous wavelet transform,S transform,and f kfilter.

关 键 词：同步挤压小波变换 时频分析 消除面波 

分 类 号：P631[天文地球—地质矿产勘探]