Abstract：In the light of the fact that different signal/noise ratios occur in different fre-quency bands and different time intervals of a seismic section,and the fact that there are quite good correlations between the wave forms or energies of the effective waves of neighbouring seismic traces whose noises have been removed,we advance the method for improving signal/noise ratio and resolution by using wavelet package trans form and polynomial fitting. The method includes the following steps:1)decomposing the wavelet package of every seismic trace to form time interval and frequency-band wavelet package sections;2)separating signals from noises by using polynomial fitting and CDP reflection correlation.and 3)combining wavelet packagesections into one seismic section whose noises have been suppressed.Theoretical and real data processing results show that time-interval and frequency-band data processing method involving vertical wavelet package decomposition and lateralpolynomial fitting can improve both signal/noise ratio and resolution of seismic section.
