Velocity Model Building with Guided Wave Inversion

Guided wave inversion (GWI) estimates accurate P-wave velocity in the near surface by analyzing the dispersion curves of guided waves. In this paper, we propose a robust inversion scheme to reduce the non-unique solutions and discuss the usage of GWI for full waveform inversion. This method is applied to a North Sea towed steamer survey. The FWI converge faster with GWI and the updates are more geologically plausible. GWI improves the seismic images and gather flatness at both shallow and deep targets.