Petroelastic Models for Santos Basin Pre-Salt Carbonates

Summary The Brazilian pre-salt comprises giant oil fields with high productivity carbonate reservoirs. Petroelastic modelling is an important tool for seismic interpretation. It uses rock physics models to estimate the elastic properties from petrophysical and compositional information and may be applied to forecast reservoir elastic behaviour from conceptual geological models as well as to estimate petrophysical properties from seismic elastic inversion results. We discuss the application of three rock physics models to pre-salt rocks from the Santos Basin: Stiff sand model (SSM), Vernik-Kachanov model (VKM) and Differential Effective Media (DEM). The results show that these three models perform very well in predicting reservoir elastic properties. We believe that the choice of a particular model can be based on the available parameters and on the desired application.