Abstract: In 4-D seismic monitoring of reservoirs, twice repeated measured data are of non-consistency because of various factors, occurring in time-delay, energy difference/variation, bandwidth variation and phase variation of signals. In order to effectively make use of 4-D seismic data, protect the variations resulted from fluid and oil-gas reservoir and remove the variations resulted from non-reservoir, the cross-equalization calibration on 4-D seismic data should be made. This article describes the theory of cross-equalization processing, presents the method for obtaining best corrector matching filters. The case study indicates that this technique can be used to well remove the undesired variations, verifying the correctness and effectiveness of this technique.

Key words: 4-D seismic exploration, cross-equalization calibration, desired variation, undesired variation, difference