Velocity inversion and scatterer detection with 3d p-cable data

While established methods for the retrieval of depth-velocity models require seismic data with sufficiently large channel counts, velocity-model building for zero-offset data remains challenging. Building on recent studies, we propose a workflow that exploits the diffracted wavefield for depth-velocitymodel building. This workflow consists of three principal steps: (1) revealing the diffracted wavefield by modeling and adaptively subtracting reflections from the raw data, (2) characterizing the diffractions with physically meaningful wavefront attributes, (3) estimating depth-velocity models with wavefront tomography. In this study, we apply this workflow to a set of inlines taken from a 3D P-Cable dataset acquired near Ritter Island and use the obtained 2D velocity models to approximate a 3D velocity model for the whole data cube.