应用地球物理(英文版)
應用地毬物理(英文版)
응용지구물리(영문판)
APPLIED GEOPHYSICS
2011年
1期
36-47
,共12页
于永才%王尚旭%袁三一%戚鹏飞
于永纔%王尚旭%袁三一%慼鵬飛
우영재%왕상욱%원삼일%척붕비
conformal mapping%higher-order spectra%phase wrapping%wavelet estimation
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 method.We also extend the idea of conformal mapping in the bispectral wavelet phase spectrum estimation to trispectral wavelet phase spectrum estimation.