Underground Storage Reservoirs

Underground Storage


Iona’s gas fields consist of open system, porous sandstone underground reservoirs

Ongoing 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 also receives gas from the offshore Casino Field and is configured to receive gas from new fields as they become developed.

Iona’s gas fields consist of an open system, porous sandstone reservoir.

The geological structures of the reservoirs are well suited to the ongoing storage of natural gas.

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

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