基于同步挤压S变换的地震信号时频分析  

Time-frequency analysis of seismic data using synchro-squeezing S transform

作　　者：刘晗[1,2] 张建中[1,3,2] 黄忠来[1,2] 

机构地区：[1]海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋地球科学学院,山东青岛266100 [3]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266061

出　　处：《石油地球物理勘探》2017年第4期689-695,共7页Oil Geophysical Prospecting

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

摘　　要：S变换(ST)被广泛应用于时频分析,但受海森堡不确定性原理制约,其分辨率有限。同步挤压S变换(SSST)是一种正反无损可逆变换,通过对S变换时频谱在频率方向上进行挤压,使能量聚集到信号的真实瞬时频率上,显著地压制了虚假频率成分、提高了信号的时频谱的分辨率。将SSST方法应用于合成信号和实际地震资料处理,所得结果表明SSST比ST具有明显的提高地震信号时频分辨率的能力,有利于薄层识别和储层描述。The S transform(ST)is a one of widely used time-frequency analysis methods,but affected by the Heisenberg uncertainty principle,its resolution is limited.A new time-frequency transform called synchro-squeezing S transform(SSST)is proposed in this paper,which effectively eliminates false frequency components and improves the time-frequency resolution by squeezing the result of S transform in the frequency direction,and the inverse transformation of SSST is lossless.Tests on synthetic data and seismic data show that the proposed transform yields time-frequency results with higher resolution than the ST and preserves signal frequency characteristics,which helps thin bed reservoir identification.

关 键 词：同步挤压S变换 时频分析 时频分辨率 薄层 地震资料 

分 类 号：P631[天文地球—地质矿产勘探]