基于保角变换的双谱域相位谱估计方法及其在地震子波估计中的应用

• Published in: 应用地球物理（英文版） 2011, Vol.8 (1), p.36-47
• Main Authors: 于永才, 王尚旭, 袁三一, 戚鹏飞
• Format: Article
• Language: Chinese
• ISSN: 1672-7975
• DOI: 10.1007/s11770-011-0269-1

P631.443; Seismic wavelet estimation is an important part of seismic data processing and interpretation, whose preciseness is directly related to the results of deeonvolution and inversion.Wavelet estimation based on higher-order spectra is an important new method.However, the higher-order spectra often have phase wrapping problems, which lead to wavelet phase spectrum deviations and thereby affect mixed-phase wavelet estimation.To solve this problem, we propose a new phase spectral method based on conformal mapping in the bispectrai domain.The method avoids the phase wrapping problems by narrowing the scope of the Fourier phase spectrum to eliminate the bispectral phase wrapping influence in the original phase spectral estimation.The method constitutes least-squares wavelet phase spectrum estimation based on conformal mapping which is applied to mixed-phase wavelet estimation with the least-squares wavelet amplitude spectrum estimation.Theoretical model and actual seismic data verify the validity of this met