Arun LNG plant is the second Indonesian LNG plant. It began production of LNG in August 1978. The plant site is located in the North Coast of Sumatra, is owned by PERTAMINA. Plant feed is supplied from the Arun gas condensate field located approximately 30 kms from the plant.
The overall complex is designed to produce LNG equivalent to 18 MM NM3 per day of gas, and 12,000 M3 per day of stabilized condensate.
Field facilities produce and separate gas and condensate for delivery through separate pipelines to the LNG plant. At the plant, condensate is stablized and stored in four 78,705 M3 floating roof tanks and subsequently shipped in conventional tankers, moored offshore.
The gas is treated, dehydrated and liquefied. Gas treating is accomplished by the Benfieid Hi-Pure process. Lique-faction is accomplished using the propane pre-cooled multi-component refrigerant process.
Refrigerant components required for the liquefaction process are produced from two fractionation trains.
Gas is processed by three parallel, identical, treating, dehydration, liquefaction trains each designed to produced about 10,700 cubic meter per day of LNG in storage. LNG is stored in three 127,200 cubic meter storage tanks. From the tanks, the LNG is pumped to the harbour area for loading into LNG tankers.
The overall complex includes the plant and harbour operations plus a complete infrastructure of housing and utilities systems to support 5000 people.
Current plans inlude the expansion of the plant by adding two liquefaction trains.
These are scheduled to start-up in 1984.