Otway Gas Project
Fact Sheet
October 2009
Background
The Otway Gas Project, located in southern Australia, is based on two offshore
gas fields, Thylacine and Geographe, discovered in 2001 by exploration joint
ventures operated by Origin. The Thylacine field is located in Tasmanian waters
approximately 70 kilometres south of Port Campbell in Victoria, and the
Geographe field is located 15 kilometres north of Thylacine in Victorian waters.
Following further appraisal of the discoveries a joint venture was formed from
the participants in each of the discoveries to enable the joint development of
the fields, and Woodside was appointed as the development operator. The
development project was sanctioned in 2004 and production commenced in mid
2007.
Raw gas is extracted using the remotely operated Thylacine platform and
brought to shore via offshore and onshore pipelines to the gas processing plant
located north of Port Campbell. Natural gas, condensate and liquefied petroleum
is produced at the plant.
The initial phase of the project included only development of the Thylacine
field. Later phases of development will include the addition of gas compression
facilities and development of the Geographe field.
The Otway Gas Project is designed for average production of 60 petajoules of
natural gas per annum (PJ/a), together with approximately 100,000 tonnes of
LPG and approximately 800,000 barrels of condensate. The maximum operating
capacity of the onshore plant is approximately 205 terajoules per day
(equivalent to 75 PJ/a).
The plant is part of a local gas industry hub that includes processing capabilities
for the Minerva and Casino developments, the Iona underground gas storage
facility and the junction of natural gas pipelines to Adelaide, Melbourne and
Origin’s Mortlake gas fired power station which is currently being constructed
approximately 70 kilometres to the north. A number of discovered and as yet
undeveloped fields are also present in the region, including the Halladale and
Black Watch fields owned 100% by Origin.
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Offshore Development
Location:
55km (Geographe)
(Thylacine)
south
Campbell, Victoria
Water depth:
80-100 metres
Permits:
Vic/L23 – Geographe
T/L2 – Thylacine
T/L3 – Thylacine
Discovered:
2001 – Thylacine
2001 – Geographe
Joint Ventures (October 2009)
Woodside Energy Ltd (Operator)
Origin Energy Resources Ltd
Benaris International N.V.
CalEnergy Gas (Australia) Ltd
Well head platform
to
of
70km
Port
Equity (%)
51.55
30.75
12.70
5.00
Onshore Gas plant
- remotely operated
- 70km offshore
Gas pipeline
Geographe gas field – water depth 85m
(to be developed post 2010)
Thylacine gas field – water depth 100m
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Thylacine platform
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Otway gas plant, Victoria
Otway gas plant, Victoria
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