Comparison of the Upper Section Velocity Models Built with Tomography and FWI

This paper considers results of upper section velocity model creation using first arrivals tomography and Full Waveform Inversion of Early-Arrival Waveform. The comparison is made for different models and the limitations and advantages of each method in specific geological conditions are shown. Reliable solution for creating near-surface model is premised not only on using well- known and proven seismic algorithms such as Generalized Linear Inversion (GLI3D) or Early-Arrival Waveform Tomography (FWI). It also includes joint inversion of electrometry and microgravimetry data. The solution obtained for near-surface velocity model satisfies not only the measured seismic, but also electrical and gravitational fields.