Carbonate Saline Aquifer Characterization for Carbon Storage Complex

Summary We conducted study on carbonate reservoirs and saline aquifer, namely the Lower Cibulakan eqv Baturaja Formation located at North West Java Basin, Indonesia. This study purposes to get Storage Capacity, Containment and Injectivity for Carbon Storage Complex. The methods employed for facies and diagenesis analysis of the Lower Cibulakan carbonate reservoir involved biostratigraphic analysis and sedimentological analysis. Geophysical analysis support karst feature finding and furthermore reveal high density fracture associated with fault. Our Finding of karst feature that exist in depleted reservoir and saline aquifer raise question of vertical and horizontal permeability. Our Plume model with different scenario suggest early plume breakthrough. Our result at Caprock integrity, Top Seal, Fault Seal Analysis and Fault Reactivation suggest to limit injection pressure below fracture gradient 0.75 psi/ft and maximum BHP at Injector 2800 psi. Despite we doesn’t perform geochemical analysis but solubility trapping, residual trapping and immiscible pressure from this carbonate saline aquifer will contain the CO2 safely.