Abstract
Summary In some areas with complicated surface conditions, such as mountains, towns, and reservoir nature reserves. Seismic acquisition by dynamite source is prohibited. Although through the shot-point transferring, the overall coverage can be achieved, the lack of shallow or near-offset information has a great impact on near-surface velocity model inversion, velocity analysis and imaging. Therefore, seismic acquisition by a combination of dynamite source and vibroseis is adopted. However, the wavelets, amplitudes, frequencies, and phases acquired by mixed sources are inconsistent, which will cause the illusion of fine interpretation. In order to solve the mismatches of mixed source, this paper proposed a high-precision matching processing method overcoming the shortcomings of conventional matching filtering processing method, which does not consider the influence of noise. This method solves the inconsistency problem of the data collected by mixed sources, eliminates the differences caused by different excitation methods, and improves the S/N ratio and imaging quality of seismic data. Actual processing results show that the high-precision matching processing method of mixed sources can effectively solve the inconsistency problems and can be applied to merging seismic data processing.
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