摘要
In this paper, the authors put forward here a method for quality factor estimation on pre-stack seismic data using spectrum decomposition. First the authors use S-transform on pre-stack seismic data for time-frequency analysis. Then the authors obtain the slope of the ratio of frequency spectrum trace by trace. Finally the authors get the quality factors at zero-offset after offset-return-to-zero process. Model and real data examples show that this method not only considers the change of amplitude and frequency caused by stratigraphic absorption, but also avoid the average effect of the absorption coefficient, so it can improve the accuracy of Q estimation and its applicability.