A FWI workflow for Jackdaw Ocean Bottom Node (OBN) dataset is described. Small receiver coverage, large receiver crossline spacing and no well information make it challengeable to apply FWI against this dataset. Improved shallow velocities and increasing offset, depth and traveltime enable us to get high resolution shallow FWI velocity model. Source estimation using near offset direct waves is a good approach for shallow sea bottom data. Convergence of FWI was confirmed by shallow depth slices of velocity model, seismogram comparison and phase residual between observed and synthetic seismograms.

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