Abstract

This scientific article investigates fluid flow behavior and the feasibility of carbon dioxide (CO2) storage in fractured basement rocks (Granite and Basalt) within a tectonically active region. The study specifically focuses on assessing the influence of fracture connectivity on the storage capacity within these fractured network. A simulation-based approach was developed using a python built workflow that generated randomly oriented fractures and classified them based on their connectivity (connected or unconnected) using a mathematical threshold. The study investigates the relationship between the number of fractures and the proportion of connected fractures, as well as the variation of average stored CO2 volume with respect to the fracture angle. The results demonstrate different trends in storage, influenced by buoyancy and geological stress. To provide a more comprehensive analysis, the dissolution of the injected gas within the preexisting water has also been taken into consideration. Geological understanding is integrated into the analysis to assess the potential of fractured basement formations for carbon storage and to address challenges related to fractured reservoirs. The findings from this study contribute to advancing the knowledge and techniques required for successful implementation of carbon storage in such geological formations