Iona’s reservoirs and facility
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 – Iona, North Paaratte and Wallaby Creek.
The Iona facility consists of production/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.
Compressed gas can be injected into the South West Pipeline to supply Melbourne, the SEA Gas Pipeline to supply Adelaide, or into the storage reservoirs for later withdrawal.
It also has interconnection with the Casino offshore fields and the Mortlake Power Station, and associated flow lines and MEG injection facilities associated with each of the satellite fields (the North Paaratte field and Wallaby Creek field).
An interconnect pipeline also exists between the Iona Gas Plant and the neighbouring Otway Gas Plant. The pipeline was developed to enable gas transfer between the plants.