Abstract：In praetical seismic exploration, it is difficult to make two rcpeated surveys completely consistent beeause of the influence of surveying conditions. The paper defined the difference of seismic responses resulted from fluid and oil-gas reservoir as antieipant difference and from other factors (non reservoir) as non anticipant difference. In order to effectively protect the anticipant difference and remove the non-anticipant difference, the paper first simulated the synthetic seismograms having differences in single factors such as amplitudes, times,phases and frequencies appeared in different times and differences in mix factors, then used cross-equalization technique for separate correction of single factors such as amplitudes, times, phases and frequencies and correction of mix factors on synthetic seismograms. The results of corrections showed that the operators of amplitude, time, phase and frequency in computed cross-equalization technique can effectively remove the non-anticipant difference and better restore the anticipant difference. It is further showed the correctness and effectiveness of the conclusion by practical data processing and laid the foundations for the following application in real data processing.
