摘要
面波是原始地震资料中主要的噪声之一,其强能量特性严重影响了地震资料的品质。为了提高地震资料的品质,又不损伤有效信号,提出了一种基于自适应相减滤波和Curvelet变换组合压制面波的方法。首先利用自适应相减滤波的保真保幅特性,最大限度保护有效信号的同时压制大部分面波,然后通过Curvelet变换的多方向特征压制残留面波。实际地震数据处理后,面波得到有效压制,资料信噪比明显提高,振幅时间切片更加光滑,分频扫描记录中低频信息保护较好,是一种相对保真保幅的面波压制方法。
Surface wave is one of the primary noises in raw seismic data.It is so strong that it seriously affects the quality of seismic data.In order to improve the quality of seismic data without damaging effective signals,this paper proposes a method for suppressing surface waves based on the combination of adaptive subtraction filtering and Curvelet transform.First,adaptive subtraction filtering has the fidelity and amplitude-preserving characteristics,which is used to suppress most surface waves while maximally protecting effective signals.Then Curvelet transform has the multi-direction characteristics,which is used to suppress residual surface waves.After the processing above,surface waves are effectively suppressed,the signal-to-noise ratio is significantly improved,the amplitude time slice is smoother,and the low-frequency componentis better protected in the cross-frequency scanning record.Analysis and research show that the method proposed in this paper can effectively suppress surface waves while protecting effective signals.It is a relatively fidelity and amplitude-preserving method for surface wave suppression.
作者
李继伟
臧殿光
刁永波
张琳
简世凯
石勇
LI Jiwei;ZANG Dianguang;DIAO Yongbo;ZHANG Lin;JIAN Shikai;SHI Yong(Southwest Branch,GRI,BGP,CNPC,Chengdu,Sichuan 610000,China;School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Southwest Geophysical Prospecting Branch,BGP,CNPC,Chengdu,Sichuan 610000,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2020年第5期1005-1015,932,共12页
Oil Geophysical Prospecting
基金
国家科技重大专项“大型裂缝—孔洞型碳酸盐岩气藏地球物理评价与预测技术研究与应用”(2016ZX05052)
东方地球物理公司科研专项“叠前去噪及高分辨率处理新技术研究与应用”(12-19-04-2018)联合资助
关键词
面波
自适应相减
CURVELET变换
保真保幅
去噪
surface waves
adaptive subtraction
Curvelet transform
fidelity and amplitude-preserving
noise attenuation
作者简介
李继伟,四川省成都市华阳大道一段216号东方地球物理公司西南物探研究院,610000。Email:1026639387@qq.com;李继伟,助理工程师,1992年生,2015年本科毕业于长江大学,获勘查技术与工程专业学士学位,现就职于东方地球物理勘探公司西南物探研究院,主要从事地震数据处理及方法研究。
