Estimation of CO₂ practical capacity in saline formations

Based on the Techno-Economic Resource-Reserve Pyramid, CO₂ storage capacity is divided to Theoretical Capacity, Effective Capacity, Practical Capacity, and Matched Capacity. These different classes consider the data sufficiency on geology, engineering, economics, and CO₂ sources, respectively. Practical Capacity is important for a mature CCS project. The purpose of this study was to propose a procedure for estimating Practical Capacity. A case study focusing on estimations of Practical Capacity was presented and discussed. Combining simulation runs and economic analysis, the values of Practical Capacity were evaluated. We found that there is a linear relationship between Practical Capacity and net present value (NPV). The relationship is useful for determining the optimal operation scenario when the best Practical Capacity or NPV is considered.