The proposed CO2 storage classification framework begins with theoretical storage resource.
This represents the absolute total pore volume within a rock formation or geologic storage target after fundamental formation characteristics are taken into account.
There are no restrictions or constraints put on this estimate, and as a result, this level of resource is a theoretical maximum that is an unrealistically high value.
The first division of theoretical storage resource (characterized) considers only the pore volume in known (i.e., well-characterized) reservoirs and formations.
CSLF accounts for these two definitions in its theoretical storage capacity.
This is accomplished by using two equations, one which takes into account spatial variability of porosity and irreducible water saturation proposed (i.e., knowledge obtained by characterizing the site) and one neglecting this variability.
This division improves on the CSLF pyramid by explicitly accounting for resources that are in characterized reservoirs and subsequently those that are uncharacterized.