Underground storage of natural gas

The Iona Gas Storage Facility sits above large gas storage reservoirs that are used to store gas on behalf of our customers during periods of low gas demand for injection into the pipelines during high demand periods, such as winter. Iona is connected to four pipeline connection points, which receive gas for storage and also deliver gas out of storage. 

Iona’s gas reservoirs are naturally occurring; located approximately 1200 – 1500m underground in high quality porous sandstone rock formations in the subsurface. These geological structures of the reservoirs are well suited to the ongoing storage of natural gas. 

Gas is stored in four underground storage reservoirs: the Iona, North Paaratte,  Wallaby Creek and Seamer reservoirs.

The Iona Gas Storage Facility consists of production/injection wells and gas processing equipment. The facilities include equipment for the separation of hydrocarbon liquids and water in processing gas from the storage reservoirs and a fleet of export and injection compressors.