降维虚同相轴法压制陆地层间多次波  

Dimensionality Reduced Virtual Event Method to Suppress Internal Multiples for Land Seismic Data

作　　者：谢飞[1] 安圣培 朱成宏[1] 刘嘉辉 胡天跃[2] XIE Fei;AN Shengpei;ZHU Chenghong;LIU Jiahui;HU Tianyue(Petroleum Exploration and Production Research Institute,Sinopec,Beijing 100083;School of Earth and Space Sciences,Peking University,Beijing 100871)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]北京大学地球与空间科学学院,北京100871

出　　处：《北京大学学报（自然科学版）》2021年第6期1101-1107,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点研发计划(2018YFA0702503);国家自然科学基金(41674122)资助。

摘　　要：针对陆地层间多次波压制效果不明显的问题,提出降维虚同相轴法,实现叠前陆地地震资料的层间多次波压制。对经过精确动校正的叠前道集,逐道应用虚同相轴法预测层间多次波,实现降维处理。与传统的虚同相轴法相比,运算量大大降低,且不再要求炮检点规则且密集地分布。同时,引入加权叠加的高信噪比参考道,参与叠前道集的互相关和褶积运算,提高了虚同相轴法的预测精度。将所提方法应用于中国西部地区实际陆地地震资料,取得明显的层间多次波压制效果。As the land internal multiples could not been obviously attenuated,the authors develop the dimensionality reduced virtual event method to suppress the internal multiples in pre-stack land seismic data.Compared with the traditional virtual event method,the authors apply the virtual event method trace by trace on the pre-stack gathers after accurate dynamic correction to predict internal multiples.It achieves dimensionality reduction,greatly reduces the amount of calculation,and no longer requires a regular and dense enough distribution.Meanwhile,this method introduces a weighted reference trace with high signal-to-noise ratio to participate in the cross-correlation and convolution operations of the pre-stack gathers,which improves the prediction accuracy of the virtual event method.This method is applied to actual land seismic data in western China and achieved obvious effect when suppressing internal multiples.

关 键 词：层间多次波 虚同相轴 降维 互相关 自适应相减 

分 类 号：P631.4[天文地球—地质矿产勘探]