Robust full-waveform inversion with graph-space optimal transport: Application to 3D ocean-bottom cable Valhall data

Improving full-waveform inversion robustness to cycle-skipping has been the subject of a large number studies. From several families approaches developed, one most documented consists in modifying least-squares distance misfit function. all propositions made improve and replace distance, only few them have applied field data. One methods proposed recently, graph space optimal transport presents appealing properties for data applications. We compare it with an analysis performed on three-dimensional ocean bottom cable from Valhall field. first perform this comparison starting reflection traveltime tomography model used previous then second crude, linearly varying in-depth one-dimensional velocity model. Starting model, least-squares-based fails provide meaningful estimate pressure-wave due cycle skipping. illustrate how graph-space transport-based mitigates issue. A is obtained zone sampled by both diving reflected waves, down almost two kilometers depth.