等间距地震道插值的傅里叶重建法  

Interpolating equal group interval seismic traces by Fourier reconstruction

作　　者：王立明[1] 刘保华[1,2] 王揆洋[2] 

机构地区：[1]长安大学地质工程与测绘工程学院,陕西西安710054 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《中国石油大学学报（自然科学版）》2008年第6期51-56,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”计划项目(20060109A1004)

摘　　要：地震采集过程中经常会碰到的大空间采样、坏道和数据分布不规则等问题,影响了地震处理及成像效果。针对上述问题,提出了一种改进插值方法,即扩大原来的空间距离长度,使空间波数采样变密,然后根据似二维F-K频谱图里取中间某一范围的频谱值,就可以去掉噪声和假频,振幅也可得到很好加强。理论和实际地震数据测试结果验证了修改后的方法插值效果好。The problems of large spatial sampling, dead traces and irregular sampling often happen in seismic acquisition, which are suboptimal to process seismic data and obtain imaging results. Therefore, an improved interpolation method was proposed. Extending original length of spatial distance, thickening spatial and wavenumber sampling and taking out certain spectra by similar 2D F-K spectra can eliminate noise and alias, and also enhance the amplitude. The tests of synthetic models and real seismic data prove that good interpolation results can be obtained by the imnroved method.

关 键 词：地震采集 插值 傅里叶系数 非二次模型权函数 稀疏反演 似二维F—K频谱 

分 类 号：P631.4[天文地球—地质矿产勘探]