摘要
多次波压制是地震数据处理的重要环节之一,而Radon变换方法以其优势被广泛应用于多次波处理环节中.本文提出利用时间延迟量Γ代替传统抛物Radon变换的曲率参数q,对地震记录同相轴进行积分运算.当使用时延Radon变换时,输入数据的道数作为重要参数直接影响Radon变换域的假频,而非传统抛物Radon变换空间方向的采样间隔.使用预条件算子通过重建间接增加输入数据的道数,消除Radon域的假频问题,提高成像精度,进而更好的实现多次波压制.利用本文方法对水平层状介质和复杂模型数据进行试算,结果表明,Radon域假频得到有效抑制,多次波压制效果明显.
Multiple suppression is one of key steps in seismic data processing,Radon transform is popular and widely used in multiple suppression in seismic data pre-processing.The curvature parameter q is substituted by time-delay value Γduring the course of integral algorithm in the proposed approach in this paper.The artifacts in the time-delay Radon domain is decided by the trace number in the input CMP or shot records,but not the spatial interval along offset direction in the traditional Radon transform algorithm.To decrease the artifact,and also to improve the precision of imaging in the transform domain,the pre-condition operator is used in the proposed method,and then the better result is acquired for multiple suppression.The simple and complex forward modeling shot records are tested for multiple suppression using time-delay Radon transform,the results demonstrated that the proposed approach is anti-aliased,and the primary is preserved better after multiple suppressing.
出处
《地球物理学进展》
CSCD
北大核心
2015年第1期165-170,共6页
Progress in Geophysics
基金
国家自然科学基金项目(41474118)
国家"863"高技术研究发展计划项目(2012AA061202)联合资助
