Detailed preliminary assessment of subsurface is required in potential site for CO2 re-injection in order to ensure safe and viability of the project. Using 3D seismic data analysis and well correlation, a potential site located onshore Niger Delta Basin was assessed for CO2 re-injection. The result indicates multiple reservoir units across the stacked stratigraphy, indicating potential multiple CO2 storage intervals. Well correlation using four wells has further revealed a laterally extensive, thick and sealed potential reservoir located at supercritical depth favorable for geosequestration. Traps are found to be mainly structural consisting of collapsed crest and rollover anticlines. Growth faults are the dominant structural type and the overall structural style within the field is simple with minimal complexity. In the triangle analysis, a potential leak point characterized by thick sand blocks and low potential for shale smearing shows high tendency for CO2 leakage. However, this would only be the case if injected CO2 exceeded the maximum supportable column heights which can be obtained using 3D fault seal modeling to further characterized the basin.