Abstract: Seismic synthetic record in common angle domain is different from conventional one. When incident angle is greater than critical angle, reflection coefficient becomes complex number. To calculated the modulus of reflection coefficient and to make synthetic seismogram in time domain do not present the phase message of waveform. This paper calculates the reflection coefficient using approximate formula derived from Zoeppritz equation for any incident angle. Using Fourier transform, big angle seismic record with complex coefficient is modeled in frequency domain. Using given treatment scheme, synthetic seismogram is modeled in angle domain. This provides basic data for the study of waveform deformation correction method in cross-well seismic data processing.

Key words: cross-well seismic, angle domain, synthetic seismogram, reflection coefficient, approximate formula