Advances in OBN imaging for pre-salt fields

The Santos Basin’s pre-salt oil fields in Brazil have moved from exploration to development, requiring deeper reservoir insight. This study showcases how five years of ocean-bottom node (OBN) processing advancements enhance understanding of the Tupi field’s complex pre-salt reservoirs. Techniques like elastic Time-Lag FWI, RTM angle gathers with spherical binning, and internal multiple attenuation improve velocity models, fault definition, and AVA response. These advancements reduce uncertainty in Vp/Vs-based reservoir inversion, enabling more precise subsurface characterization.