Technology Collaboration Programme by IEA logo

IEA Greenhouse Gas R&D Programme

Background to the Study


This workshop was a joint effort between the Clean Energy Ministerial (CEM) CCUS Initiative, the United States Department of Energy (DOE), the United States Geological Survey (USGS) and the IEA Greenhouse Gas R&D Programme (IEAGHG). Held on the 21st September 2021, this virtual workshop welcomed 59 invited attendees involved with and interested in CO2 storage.

The aims of this workshop were to review current methodologies and initiatives for quantifying CO2 geological storage, review current data availability and assess gaps, establish core international contacts and a community with direct interest in CO2 storage resource. The workshop also discussed opportunities on how to address the identified data gaps in various parts of the world, through either bilateral or multilateral collaboration and via an international network to collate and refine estimates of CO2 storage capacity.


The workshop facilitated in-depth discussions between participants in sessions that looked at current methodologies and initiatives, the status of base data, priority development areas and storage resource refinement, and setting up an international network to build CO2 storage resource assessment.

The report is available to download.