One of the most important problems facing the environment nowadays is climate change. CCS (carbon capture and storage) has been considered a promising mitigation technology that can help in reaching the decarbonization goal and contribute to the climate change mitigating efforts. After presenting an overview of the CCS technology, the various storage types and the importance of the trapping mechanisms, numerical simulations and models will be investigated to understand the major effect of the reservoir and injection parameters on the injection process of CO2. A detailed sensitivity analysis was performed, investigating some key factors to determine their impact on the storage capacity as well as on the injectivity.