Efficiently Using Full-waveform Inversion in the Velocity Model Building Flow
D. Vigh, K. Jiao, X. Cheng, D. Sun, J. Kapoor and O. Lewis
Event name: 78th EAGE Conference and Exhibition 2016
Session: Full Waveform Inversion II - Inversion Strategies
Publication date: 31 May 2016
Info: Extended abstract, PDF ( 1.11Mb )
Price: € 20
The conventional FWI is exposed to cycle skipping especially when the initial model is inadequate and the ultra-low frequencies are not present in the observed data. If the FWI does not have the power to mitigate the cycle skipping then initial velocity must be built by travel-time tomography. This way the model building would comprise of travel-time tomography followed by FWI and finish the flow with travel-time tomography. Our FWI does not require half wavelength convergence criteria this is why we can skip the first travel-time tomography in the flow which shortens the turnaround time on depth imaging projects. This FWI and the new workflow are demonstrated by synthetic and field data examples.