基于快速双曲Radon变换的多次波压制  

Multiple Wave Suppression Based on Fast Hyperbolic Radon Transform

作　　者：张永豪 苏海 高棒棒 李爱荣 ZHANG Yong-hao;SU Hai;GAO Bang-bang;LI Ai-rong(School of Earth Science and Engineering,Xi'an Shiyou University,Xi’an 710065,China;Key Laboratory of Hydrocarbon Accumulation of Shannxi Province,Xi’an 710065,China;School of Geophysics,China University of Petroleum,Beijing 102249,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]陕西省油气成藏地质学重点实验室,西安710065 [3]中国石油大学地球物理学院,北京102249

出　　处：《西安文理学院学报（自然科学版）》2023年第2期79-85,共7页Journal of Xi’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(41772140)。

摘　　要：作为一种相干噪声,多次波的存在严重影响了偏移成像精度,给地震资料解释带来极大困难.多次波与有效波在Radon域中的聚焦点不同,利用此特点可以实现多次波的压制,然而,基于常规双曲Radon变换实现的算法效率低下,处理大型地震数据受限.提出一种快速双曲Radon变换压制多次波的方法,在常规双曲Radon变换的基础上进行改进,使积分路径与多次波同相轴相适应,利用线性调频Z变换和快速傅里叶变换对数据直接在频率域中求解,从模拟和实际地震资料的处理表明,方法较常规双曲Radon变换计算效率有显著提升,同时多次波得到了良好的压制,取得了较满意的效果.As a kind of coherent noise,the existence of multiples seriously affects the accuracy of migration imaging and brings great difficulties to seismic data interpretation.The focus points of multiples and effective waves are different in the Radon domain,which can be used to suppress multiples.However,the algorithm based on the conventional hyperbolic Radon transform is inefficient,and the processing of large seismic data is limited.In this paper,a fast hyperbolic Radon transform method for suppressing multiples is proposed,which is improved on the basis of the conventional hyperbolic Radon transform to adapt the integral path to the multiples'phase axis.The data is directly solved in the frequency domain by using the linear frequency modulation Z transform and the fast Fourier transform.The processing of simulated and actual seismic data shows that the calculation efficiency of this method is significantly improved compared with the conventional hyperbolic Radon transform,At the same time,multiples are well suppressed,and satisfactory results are obtained.

关 键 词：相干噪声 成像精度 Radon域 快速双曲Radon变换 多次波压制 

分 类 号：P631[天文地球—地质矿产勘探]