自适应滤波和曲波变换联合衰减面波  

Ground Roll Wave Suppression Based on the Combination of Adaptive and Curvelet Transform

作　　者：李江 LI Jiang(Xi’an Research Institute of China Coal Technology&Engineering Group,Xi’an 710077,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,西安710077

出　　处：《科技和产业》2024年第22期329-333,共5页Science Technology and Industry

基　　金：陕西省自然科学基础研究计划面上项目(2024JC-YBMS-236)。

摘　　要：为了去除地震勘探资料中的低频面波干扰,提出了自适应去噪和曲波域滤波联合的分频渐进面波衰减方法。通过时频分析统计面波的频率、速度等特征参数并进行面波模拟,利用最小二乘自适应相减法压制面波的中、低频成分;之后进行曲波变换,在曲波域将残余高频段面波与有效波分离进而压制面波。自适应与曲波域去噪联合的面波压制方法,分步、分频地消除了面波的高、低频成分,原始数据的低频信息得到较好的保留。该方法相对保幅保真,实际资料的去噪效果表明了本文方法的有效性和实用性。The ground roll wave is one of the serious interference waves in the seismic raw data,and the split frequency progressive method which based on the combination of adaptive and curve let transform was proposed to suppression it.Firstly,the adaptive method was used to suppression the majority of the ground roll wave,the step includes that,statistics the characteristic parameters of ground roll wave by time frequency analysis,simulate the ground roll wave and suppress the medium and low frequency components using the method of least-squares adaptive subtraction.Secondly,the curvelet transform was used to suppression the residual noise,we carried out the transform and separated the residual ground roll wave and the effective wave,and then by processing the curvelet coefficient the high frequency component was further suppressed.The combined method can eliminate the high and low frequency components of the ground roll wave step by step,and better protect the low frequency information of the original data,so it is a relative amplitude preserving method for ground roll wave attenuation.The test effect of the actual data shows the effectiveness and utility of this method.

关 键 词：地震勘探 自适应滤波 曲波变换 面波 时频分析 

分 类 号：P631[天文地球—地质矿产勘探]