Seismic attenuation parameter estimation based on the time-frequency filtering
Gao Jinghuai1,2,3, Zhang Bing1,2,3
1. State Engineering Laboratory for Offshore Oil Exploration,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China;
2. Center for Computational Geoscience,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China;
3. Institute of Wave and Information,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China
Abstract：For seismic attenuation estimation, a key point is to improve the estimation resolution.tt is a challenge to estimate attenuation as accurately as possible within a time-window as short as possible.Margrave (1998) proposed a nonstationary-convolution model for a time varying seismic record, which might be an effective way for attenuation estimation.In this paper, a method for seismic attenuation estimation is proposed.First operators of time frequency filtering are applied to a deconvolved seismic trace to obtain a reflectivity after attenuation.Then the attenuation estimation based on the reflectivity is performed.Completely different from the other methods, this method can obtain an attenuation estimation within a short ime-window.This window can be shorter than the length of the ime-window than the wavelength of the wavelet.
