【摘要】 地震处理中重要的环节之一是地震道插值技术.野外采集过程中常会碰到大空间采样、坏道和数据分布不规则等问题.为满足地震数据处理精度要求,需进行地震道插值,提高成像效果.本文针对Zwartjes的基于非二次模型权函数稀疏反演傅里叶插值(FRSI)法存在的问题,如不规则地震道插值时不能去掉产生的噪声、假频及插值道振幅弱,等距道插值时不能准确插值,效果差,提出了改进方法,即扩大原有距离,使波数采样变密,依据似二维f-k频谱图,取中间某一范围频谱值,去除假频和噪声,以提高振幅能量.理论与实际测试验证了修改后的方法插值效果更好.更多还原

【Abstract】 One of the important links in seismic processes is seismic trace interpolation technique.There are many problems often happened in seismic acquisition such as large spatial sampling,dead traces and irregular sampling etc.To meet accuracy requirements of seismic data processing,it need be interpolated to improve imaging results.Zwartjes etc present a method of Fourier reconstruction with sparse inversion(FRSI) based on non-quadratic model weight function,which cannot remove alias and noise and improve weakly the amplitude of interpolated traces with unequal group interval data,and cannot interpolate correctly seismic traces with equal group interval data.Therefore,the paper proposes an improved method.Extending original length,thickening spatial and wavenumber sampling and taking out certain spectra by similar f-k spectra can eliminate alias and noise and enhance the amplitude energy.Tests of synthetic models and real seismic data proved that the modified method interpolated better.更多还原