Efficiency of CO₂ Foam Mobility Control with Heterogeneous Reservoir Properties

We investigate how reservoir heterogeneity affects the efficiency of CO₂ mobility control in saline aquifer storage. An ensemble of reservoir models is set up for simulation of CO₂ injection with a quarter-five-spot well pattern where CO₂ is injected, and brine is produced for pressure control at opposite corners. Results with and without mobility control are compared. Additionally, results are generated for a modified foam model where the mobility reduction factor scales with reservoir permeability. An empirical foam model with partitioning of surfactant between the CO₂ and brine phases is used.