Abstract：In time domain，synthetic seismogram results from the convolution of seismic wavelet with reflection coefficients. Seismogram synthesizing in depth domain is similar to that in time domain. synthetic seismogram in depth domain is produced in three major steps:1)transforming time-domain seismic wavelet into depth domain wavelet，2)deriving depth-domain reflection coefficients from both acoustic and density logging curves，and 3) convolving seismic wavelet with the reflection coeffidents. The key of this method lies in wavelet obtainment and reflection coefficient estimation. The dominant frequency of wavelet is estimated by using quality bore-hole-side seismic trace of migrated depth section，and zero phase wavelet is usedhere. Acoustic and density logging curves must be revised reasonably beforehand to produce reliable reflection coefficients.
