The amount of CO2 that can be stored in underground reservoirs is often summarised by the Storage Efficiency ‘E’. Storage Efficiency is a key factor - but its calculation is arguably complicated as E is impacted by lithological heterogeneity, trapping structures, boundary conditions, injection rates, well spacing, fluid properties etc.

Due to this complexity, there is much controversy on how to estimate E, with some arguing it should not be used at all and that reservoir simulation is a better path. However, estimates for E are used in most regional mapping studies, and applicability of these screening estimates to project specific Storage Efficiency studies is unclear and potentially misleading.

The industry needs a consistent and multidisciplinary approach for using storage efficiency estimates in storage capacity studies, as well as guidelines for when this measure is useful in the process of maturing CO2 storage prospects towards investment decisions.

This convention aims to bring together industry and academic experts to establish improved workflows or tables for the calculation of Storage Efficiency. The ultimate objective is to come up with a set of procedures on how to define that crucial E number, and to develop guidelines for when it should be used.

This two-day event will be a mix of keynote talks, 5-minute poster pitches, and panel discussions.