道集波形校正  

Gather waveform correction method

作　　者：王艳香[1] 王圣 张军舵[1] 苏勤[1] 邵喜春[1] 冯心远[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]中海石油(中国)有限公司天津分公司,塘沽300461

出　　处：《地球物理学进展》2014年第5期2266-2271,共6页Progress in Geophysics

摘　　要：本文以广角反射道集、不同震源子波道集和CRP道集为研究对象,对这几种道集的子波进行了全面的分析,总结出它们都存在剩余相位问题.剩余子波相位可通过道集波形校正方法来解决:1.应用整形滤波方法对不同震源子波道集进行校正;2.应用小时窗分频相位校正对广角反射记录和CRP道集进行校正.校正后解决了以下问题:不同震源子波道集由于震源子波不匹配而存在波形不一致问题;广角反射道集由于广角反射而存在的相位畸变问题;CRP道集由于实际地震记录和反褶积基本假设条件不完全一致而存在剩余子波相位问题;通过试验结果,都较好的消除了剩余子波相位成份,从而实现了同相叠加.In this paper,it can be concluded that the wavelet characters of different gathers including wide angle reflection gather,source wavelet gather and CRP gather, remain problems in phase.The problem can be solved by gather waveform correction method step by step,which are using waveform filter to correct gathers of different source wavelets followed by phase correction based on small window frequency phase correction with wide angle reflection gathers and CRP gathers.As a consequence,the inconsistent waveform resulted from mismatching of different source wavelets,phase distortion because of wide angle reflection and discrepancy between real seismic data and the output after deconvolution,can be solved.The experiments show that the residual wavelet phase is removed and realize in-phase stack.

关 键 词：广角反射道集 不同震源子波道集 CRP道集 小时窗分频相位校正 整形滤波 

分 类 号：P631[天文地球—地质矿产勘探]