Abstract：In the wavelets with the same amplitude spectrum and different phase characteristics, the zero-phase wavelet has the highest resolution, and the main peak corresponds to the reflection interface. Therefore, in seismic data processing, the influence of the residual phase of wavelets needs to be eliminated by phase correction technology. The constant phase correction method, however, does not consider the change in the residual phase of wavelets with frequency, which results in unsatisfactory phase correction results. Hence, a frequency-variation phase correction method using matched filtering under the constraint of zero-phase synthetic seismograms is proposed. This method takes the borehole-side seismic trace as the input and the zero-phase synthetic seismogram as the output. It adopts the matched filtering algorithm to obtain the phase-matching factor between the two and then convolutes it with seismic data to obtain the zero-phase seismic data. This method not only consi-ders the frequency variation characteristics of the residual phase of actual seismic data but also makes full use of the advantages of high accuracy in phase correction using synthetic seismograms of logging. The theoretical mo-del and actual data processing results show that this method can effectively eliminate the influence of frequency-variation residual phases, significantly improve the resolution of seismic data, and demonstrate strong noise immunity and great practical value.
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