Carbon Storage


Carbon storage underground is also known as geological storage or geosequestration. It is based on the same natural processes that hold oil and gas, and in some cases CO2 from volcanic activity, in the ground for millions of years. There are many underground formations around the world where CO2 can be safely stored.

Geological storage is not a new technology. The oil and gas industries have been successfully injecting carbon dioxide underground for almost 40 years, in a process called enhanced oil recovery.

The Callide Oxyfuel Project invested significant effort in planning and investigating the transport and storage of CO2. Together with research partners CO2CRC, injection trials were carried out at the Otway Project in Victoria in late 2014.

This was the first time that emissions from an Australian operating power station were captured, transported, injected and analysed for research purposes. The research team injected the carbon to around 1400 metres using existing site infrastructure. The results of the trial injection are being analysed to evaluate the geochemical and physical behaviour of oxyfuel carbon dioxide within the formation.

A Lessons Learnt paper was written towards the end of the demonstration phase. Download it here.


one of only a handful of low-emission coal projects in the world, the callide oxyfuel project has made a significant contribution to the international ccs knowledge bank.


Australian Reservoirs

Note: Although not all sites will be suitable for CO2 storage, sedimentary basins are geological formations that have trapped oil and gas reserves for thousands of years.

Map courtesy of CO2CRC

Geological Storage

CO2 pumped underground will gradually settle in the storage formation held in place by non-porous cap rock. Monitoring wells will be installed to analyse the CO2 in the reservoir.