Exploratory-scale OBN seismic acquisition in Santos Basin

Abstract

Santos Basin is well known for some of the largest pre-salt oil and gas fields in the world. For oil fields in production, OBN has emerged as the solution to improve the pre-salt images. It’s rich low frequency, full-azimuth coverage and long-offsets are ideal for velocity model building using FWI. The acquisition effort of conventional OBN layouts makes it unsuitable for large-scale exploration purposes. In this case, the use of sparse OBN acquisition for velocity model building together with NAZ streamer data for imaging can improve our understanding of complex pre-salt plays and fields during the exploration phase.