3D static modelling with uncertainties of an offshore area in Portugal for CO2 storage pilot site development

Abstract

This study presents the construction of a 3D static geological model with uncertainty assessment for the Q4-TV1 prospect in the offshore northern Lusitanian Basin, Portugal, as part of the PilotSTRATEGY project. Using seismic interpretation, well data, and petrophysical logs, lithofacies and reservoir properties were simulated with geostatistical algorithms in Aspen SKUA. The models reproduced the geological framework, including heterogeneities and stratigraphic trapping features, and identified several reservoir flow units with varying porosity and clay content. Uncertainty analyses of structural and petrophysical parameters provided probabilistic estimates of net-porous rock volumes and storage capacity. The resulting static models form the basis for dynamic simulations, supporting the evaluation of this site’s potential for safe and effective CO₂ storage.