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 NM per day of gas, and 12,000 M 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 stabilized and stored in four 78,705 M floating roof tanks and subsequently shipped in conventional tankers, moored offshore.

The gas is treated, dehydrated and liquefied. Gas treating is accomplished by the Benfield Hi-Pure process. Liquefaction is accomplished using the propane pre-cooled multi-component refrigerant process. 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 harbor area for loading into LNG tankers.

The overall complex includes the plant and harbor operation plus a complete infrastructure of housing and utilities systems to support 5000 people.

Current plans include the expansion of the plant by adding two liquefaction trains.

These are scheduled to start-up in 1984.

Summary

The Arun gas field has been in production since March 1977. The proven reserves of the field are more than enough to supply 6 trains of LNG producing equipment, each with a capacity of about 10,700 cubic meters per producing equipment, each with a capacity of about 10,700 cubic meters per day of LNG, for more than 20 years.

This gas also contains 50% by weight associated condensate. The rate of development of this gas field is according to the expansion schedule of the LNG plant and the demand by LNG consumers. Arun LNG plant is the second Indonesian LNG plant. It began handling condensate in 1977 and began production of LNG in August 1978. The plant site is located 4.5 kms west production of LNG in August 1978. The plant site is located 4.5 kms west of the town of Lhok Seumawe along the Northern Coast of Sumatra. This plant is owned by PERTAMINA, the Indonesian State Oil and Gas Enterprise. plant is owned by PERTAMINA, the Indonesian State Oil and Gas Enterprise. The overall complex is designed to produce approximately 32,100 M per day LNG in storage equivalent to 18 MM NM per day of gas, and 12,000 M per day of stabilized hydrocarbon condensate.

Field facilities produce and separate gas and hydrocarbon condensate and they are transmitted to the LNG plant through individual 42-inch gas and 16-inch condensate pipelines. At the plant, condensate flows through two stages of flash separation and is stabilized by fractionation in a reboiled stabilizer. From the stabilizer, condensate is mixed with "butanes plus" fractionated from the inlet gas stream to make a 13 psi reid vapor pressure product. product. Condensate is stored in four 78,705 M floating roof tanks and subsequently shipped in conventional tankers to various countries. The loading of condensate into tankers is from a multibuoy mooring, submarine pipeline installation.

Gas is processed by three parallel, identical trains each having treating, dehydration and liquefaction facilities. LNG is stored in three 127,200 cubic meter storage tanks. From the tanks, the LNG is pumped to a dredged our manmade harbor, for loading into LNG tankers. Since the first LNG shipment in October 1978 approximately 25 million M LNG has been sent to Japan.

Site development began in 1974. Condensate stabilization operation began in 1977. The three LNG trains were on stream in 1978. The overall complex includes the plant, LNG loading harbor and infrastructure which includes housing and utilities systems to support about 5000 people. Current plans include the expansion of the plant by adding two LNG trains. Expansion scope also includes additional inlet separation facilities, utility requirement, a new SPM for condensate loading, a second LNG berth and housing. These are scheduled for first production in early 1984.

TRANSMISSION FROM FIELD TO LNG PLANT
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Field produced feed stocks for transport to the Arun NGL plant consist of unstabilized condensate and untreated natural gas.

The gas flows through a 42-inch pipeline without pressure boosting.

Design flow capacity is about 67 MM NM /D. The pipeline gas flow and inlet and outlet pressures are controlled from the Arun Gas Field and the LNG plant through a 16-inch pipeland without flow regulation. Design flow plant through a 16-inch pipeland without flow regulation. Design flow capacity is 19,000 M /D. Condensate flow control is directly from the control room at the field as well as the plant.

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