Project Overview

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The Bayu-Undan development is a world-class project to develop the field's gas liquids resources. Following the co-venturer companies approval of the first phase of development in October 1999, an initial expenditure of approximately $US 1.8 billion on the liquids stripping/lean gas recycle phase makes it the largest investment proposed to date in the Timor Sea. The field life is estimated to be 25 years, with first liquids production planned to commence in late 2003.

The Bayu-Undan field is located in the central Timor Sea about 500 kilometres north west of Darwin Australia and about 250 kilometres south of Suai in East Timor.


The field straddles two production sharing contract (PSC) areas (91-12 and 91-13) in the Joint Petroleum Development Area (JPDA) in the Timor Sea. The Bayu-Undan field is a single gas/condensate resource with recoverable reserves of approximately 400 million barrels of liquids (condensate and LPG) and 3.4 tcf of gas.

The Bayu-Undan development will be undertaken under the terms of the PSCs and applicable regulation and by the following Unit Participants.

91-12 Co-Venturers

91-13 Co-Venturers

 Phillips Petroleum (91-12) Pty Ltd: 
ACN 064 963 346 Phillips Petroleum Company ZOC:
ARBN 054 424 109
 Santos (ZOCA 91-12) Pty Ltd:ACN 056 937 752 Kerr-McGee (ZOC) Energy Ptd Ltd:    ACN 054 269 907
 Inpex Sahul, Ltd: ARBN 059 844 781 Agip Australia 91-13 Ltd:ARBN 054 729 930
 Petroz (Timor Sea) Pty Ltd: ACN 053 697 794 Phillips Petroleum Timor Sea Pty Ltd: ACN 000 751 593
 Emet Pty Ltd: ACN 050 134 907

The Co-Venturers signed a Unit Operating Agreement on 14 July 1999 and have appointed Phillips Petroleum (91-12) Pty Ltd as the Unit Operator for the Bayu-Undan Project. The Unit Participants have also approved a Unitization Agreement as stipulated under terms of the Petroleum Mining Code relating to petroleum operations inthe JPDA, which has been approved by the Joint Authority.

Project Management

The field was discovered in early 1995 following the successful completion of the Bayu-1 located in area 91-13. Subsequent wells drilled in areas 91-12 and 91-13 confirmed the size and potential of the field. The field, which measures approximately 25 km by 15 km, will require approximately 26 wells over its life to produce the reserves; approximately 16 of these wells will need to be completed by startup. Preliminary engineering studies for the liquids stripping / gas recycle phase of development were completed in late 1998, and a detailed cost estimate was prepared for the Unit Participants. Co-venturer approval of this phase of the development was received in November 1999. The Timor Gap Joint Authority approved the Development Plan in February 2000.

Development & Facilities

The current phase of the Bayu-Undan development is a liquids stripping and dry gas reinjection project comprised of primary facilities of the approximate tonnage and sizes given below:

Drilling, Production & Processing Platform (DPP)Compression, Utilities & Quarters Platform (CUQ)Wellhead Platform ( WP1)Floating Storage & Offloading Facility (FSO)
Jacket - 10,664 tonnesJacket – 10,380 tonnes Jacket - 1,390 tonnes820k barrels (130,000m3) of Condensate
Deck – 14,000 tonnesDeck - 11,500 tonnesDeck - 1,550 tonnes2 x 300k barrels (47,500 m3) of Propane/Butane
   248m long x 54m wide

The purpose-built FSO, which will be manufactured by Samsung Heavy Industries will be permanently positioned offshore in the field. All liquid products will be sold directly to world markets and exported from the offshore facilities in the field on buyer-chartered condensate and LPG offtake tankers.
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Major Milestones

  • Completion of detailed design - Q4 2001
  • WP1 Installation - Q1 2002
  • DPP Installation - Q2 2003
  • CUQ Installation - Q1 2003
  • Hook up and commissioning - Q1 2003
  • First production - Q4 2003
  • Commence commercial production - Q1 2004





The contents of this website contain forward-looking statements made by, or on behalf of, Phillips and the other Unit Participants. Neither Phillips nor the other Unit Participants undertake to update or revise any of these forward-looking statements. These include, without limitation, statements relating to operations, plans, strategies, objectives, expectations and limitations. These statements are not guarantees of future performance or result. Rather, due to risks, uncertainties and other factors, actual results may differ materially from those expressed in any such forward-looking statement. The following are certain (but not necessarily all) important risk factors that could cause actual results to so differ:

Plans to drill wells and develop Bayu-Undan are subject to: the ability to obtain agreements or consents between or from co-venturers and governmental authorities; engaging drilling, construction and other contractors; geological, land or sea conditions; world prices for oil, natural gas and natural gas liquids; applicable law and regulatory requirements; and the availability of economical financing.

Estimates of proved reserves, raw natural gas supplies, and project cost estimates have been developed using the latest available information and data, and recognized techniques of estimating, including those prescribed by the U.S. Securities and Exchange Commission, generally accepted accounting principles and other applicable requirements.

Please note that all references to Phillips or Phillips Petroleum on this page refer to Phillips Petroleum (91-12) Pty Ltd as Unit Operator for the Bayu-Undan development, except as specifically mentioned otherwise.

Copyright 2001 Phillips Petroleum (91-12) Pty Ltd. All rights reserved.
Updated 08/06/04