The reservoirs of Pre-salt from Santos basin are very complex to be characterized stratigraphically for several reasons. When OBS (Ocean Bottom Stations) technology is used to obtain converted wave events for large offsets, there are three factors together that make the nonhyperbolicity of the event stronger. This difficulty together, with the complex stratigraphic structure, results in a much more complex study to perform a reliable reservoir characterization. To understand more deeply the

more »

... racy of the nonhyperbolic multiparametric travel-time approximations used to recover the seismic wave velocity information, the comparison of eight approximations for a conventional PP reflected event and for a converted PS reflected event was performed. Furthermore, the comparison of the L2and L1-norm was also performed to understand how the L1-norm can facilitate the optimization during the inversion, aiming to provide a more accurate parameter recovering.