基于F－K和Radon变换的多次波衰减方法

摘要

多次波干扰是地震勘探中最重要的问题之一，其衰减技术也是地震数据处理的难题之一。本文主要介绍了多次波的形成、分类及其特征，并在 ProMax 系统上对合成地震记录的多次波进行了压制：首先采用合适的速度对时－空域的地震记录进行 NMO 校正；然后，分别用 F －K 变换和 Radon 变换方法将其变换到 F －K 域和 Radon域，对多次波所占据的主要区域进行充零衰减；最后，通过对应的反变换将其变换到时－空域，从而达到多次波衰减的目的。通过在 ProMax 系统中的应用表明：不同方法对多次波的衰减效果各有优劣，组合滤波方法能达到更好的效果。%Multiples is one of common noises in seismic exploration,the techniques of multiples attenuation is a serious problem in seismic data processing.This paper introduced the formations,classifications,characteristics of multiples,and the multiples attenuation in synthetic seismic data in ProMax system.Firstly,NMO correction with the appropriate speed for CDP gathers in t-x domain;Secondly,used F -K transform and Radon transform respectively to convert it to different domains,then attenuated the area where multiples was in new domains;Fi-nally,transformed it to t-x domian through the corresponding inverse transforms to achieve the purposes of the multiples attenuation.By the applying of multiples attenuation in ProMax system,it suggests that different meth-ods of multiples attenuation have advantages and disadvantages,and multiples attenuation in combination with dif-ferent methods will achieve better results.