Seismic Inversion Integrating Seismic Attributes to Enhance Geological Models

In reservoir modelling it is not only important to infer the spatial distribution of the elastic properties to better characterize the reservoir and to generate more consistence geological models. It is also utmost important to characterize the internal architecture of the reservoir. Therefore, the resulting subsurface geological models should reproduce the tectonic deformation and discontinuities (e.g. folds and faults) and the stratigraphic features that are visible in the original seismic data. Since normally there is not a geological structural and stratigraphic constrain of traditional geostatistical seismic inversion procedures, these geological elements are no always well reproduced in the resulting petro-elastic models. The methodology proposed herein, aim to combine seismic inversion and seismic attributes, into a unified inversion framework to improve the resulting petro-elastic models in terms of structural and stratigraphic geology. The integration of structural and stratigraphic seismic attributes into the objective function allows a better reproduction of these geological elements. This methodology was successfully applied to a real case study. Constraining the seismic inversion procedure to seismic attributes, it generate a more consistent and reliable geological subsurface model and help to better reproduce the internal architecture and sedimentary sequences inside the reservoir.