Correlation of P-P and P-S Data in Yinggehai Basin, South China Sea

Summary Making offset P-S synthetic seismograms and calibrating the P-S seismic sections are the key elements of multi-component seismic data interpretation. Compared to P-P synthetic seismograms, additional factors should be considered when making offset P-S synthetic seismograms: 1) estimation of S-wave velocities, 2) environmental corrections of dipole sonic logs, 3) averaging of the P- and S-wave velocities, and 4) wavelet extraction. Further, polarity of the P-S section, sample rates of P-P and P-S data, and frequency bandwidth of P-P and P-S reflectors should also be carefully considered when generating PS seismograms. Having analyzed the above factors, we created P-S synthetic seismograms and correlated them to a P-S section from a 2D/4C seismic line in Yinggehai Basin, South China Sea. The P-S synthetic seismogram helped us to identify the target sheet sand in P-S seismic section and explained the previous interpretation failure.