Matched filtering and wavelet shaping

In the area of complex surface conditions and using different sources and seismographs for joint acquisition of seismic data, the wavelets have significantly different because of different shooting sources, receivers and lithology on the surface, which caused the amplitudes (energy), frequencies and phases of acquired seismic reflection data to have large difference. In view of shortcoming of wavelet shaping processing technique, the paper uses the matched filtering technique to replace wavelet shaping in order to eliminate reflection moveout and shape seismic wavelet. The process of implementation as follows: the matched filtering operators on two records A and B at same position are computed by deconvolution; then, we take matched filtering operators to act on A (or B) and make A (or B) approach B (or A) after matched filtering. The author uses developed interactive matched filtering software package based on the principle of matched filtering to process the 3-D seismic data in the area of shallow sea. The seismic wavelets are shaped after data processing, removing the differences among the shot-points and receiver-points and moveout between the events, realizing in-phase stack of seismic data that improves the S/N ratio on the section. The amplitudes, frequencies and phases on the joint places of seismic data acquired by different sources can be better matched, the seismic stack section at deep and shallow positions can be better put together, achieving good results.