基于双谱幅值和相位重构的地震子波提取  

A method of extracting seismic wavelet based on bispectrum amplitude and phase reconstruction

作　　者：李亚峻[1] 李月[2] 高颖[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]吉林大学通信工程学院,长春130012

出　　处：《地球物理学进展》2007年第3期947-952,共6页Progress in Geophysics

基　　金：国家自然科学基金资助项目(40574051)资助

摘　　要：利用地震记录双谱中包含子波的幅值和相位信息,以及其超强的抗噪声干扰能力,采用一种基于双谱幅值和相位重构的地震子波提取方法,首先提取出子波幅值及相位信息,进而通过傅立叶反变换,使子波得以完全恢复.本文针对双谱相位重构递推公式,提出一种新的初值选取方法,使地震子波估计的稳定性得到了提高.仿真实验证实了该方法的可行性.This paper is based on the fact that bispectrum of seismic signals contains amplitude and phase information of seismic wavelet, also has strong anti-noise-interference ability besides. A method of extracting wavelet using bispectrum amplitude and phase reconstruction is introduced in this paper. After extracting amplitude and phase information of wavelet, one can completely reconstruct seismic wavelet by inverse Fourier transform. A new method on choosing the initial value for recursion formula of bispectrum phase reconstruction has improved the wavelet estimation stability. The feasibility of the method is demonstrated by the simulation testing.

关 键 词：高阶统计量 双谱 幅值 相位 地震子波 

分 类 号：P631[天文地球—地质矿产勘探]