超虚干涉法压制瑞利波研究  

Rayleigh Wave Suppression Using Super-Virtual Interferometry Method

作　　者：王宇航[1] 安圣培 王为中[1] 胡天跃[1] WANG Yuhang;AN Shengpei;WANG Weizhong;HU Tianyue(Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871)

机构地区：[1]北京大学地球与空间科学学院地球物理学系,北京100871

出　　处：《北京大学学报（自然科学版）》2017年第1期19-25,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家科技重大专项(2011ZX05004-003);国家重点基础研究发展计划(2013CB228602)资助

摘　　要：常规的瑞利波压制方法是利用瑞利波和有效波在频率或视速度方面的差异,对瑞利波进行分离和压制,在差异较小时,压制效果不理想。针对这一问题,引入超虚干涉法实现瑞利波压制。该方法是一种数据驱动的方法,不依赖频率和视速度信息,且对于复杂地表有较好的适用性。与传统干涉法只能预测检波点间的瑞利波并要求检波点附近存在真实炮点相比,超虚干涉法可以直接得到炮点至检波点的瑞利波,进而通过多道L1范数自适应相减法去除瑞利波。通过合成数据处理,利用该方法压制瑞利波取得一定的效果。Conventional Rayleigh wave suppression methods take advantage of differences in frequencies orapparent velocities between surface waves and effective waves to separate Rayleigh waves.However,thesuppression may fail when the waves present small differences.To solve this problem,the super-virtualinterferometry method is introduced to predict and suppress Rayleigh waves.It is a data-driven method,which isindependent of frequencies or apparent velocities,and presents good applicability to complex near surface.Compared with conventional interferometry method which only predicts inter-receiver Rayleigh waves and requiresa real shot around the receiver position,the super-virtual interferometry method is able to achieve shot-receiverRayleigh waves,followed by adaptive subtraction using multichannel L1-norm.The synthetic data examplesdemonstrate the validity of the proposed method and obtain good results.

关 键 词：瑞利波 超虚干涉法 自适应相减 L1范数 

分 类 号：P631.4[天文地球—地质矿产勘探]