Task 3 provides improved capacity estimates both for regionally prospective Miocene sequestration targets (i.e., the sandstone reservoirs most likely to receive CO2 in the near-term). Based on our previous experience providing the Department of Energy's National Carbon Sequestration Database and Geographic Information System (NATCARB) with regional capacity data, we are providing NATCARB with updated capacity estimates for the offshore State lands. This work includes data from Task 2.
The basin-scale static capacity estimation process identifies target geologic storage units (GSU), and then quantitatively integrates porosity over unit thickness and GSU area to calculate fluid-filled pore-volume. Estimated efficiency of occupancy and CO2 density at reservoir conditions are used to calculate the static CO2 storage capacity. CO2 densities were calculated from compiled pressure and temperature data (example shown below) to constrain expectations for CCS.