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.


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