Longtom Gas Field

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Australia Oil & Gas Fields

Santos Oil & Gas Fields

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Summary Information

  • Operator: Santos
  • Country: Australia
  • Location: VIC/P54 in the Bass Strait
  • Production start:
  • Partners:
  • Type: Gas
  • Estimated Reserves:
  • Production Volume:


  • The Longtom field consists of two subsea wells, produced via a pipeline that connects to the existing PaB offshore pipeline and the Patricia Baleen Gas Processing Plant. The development comprises the following:
    • Two subsea production wells – Longtom-3 and -4, with facilities to allow the tie-in of a future third well.
    • A 17 km 300 mm DN pipeline starting at the Longtom-3 well and connecting into the offshore end of the PaB pipeline.
    • A High Integrity Pipeline Protection System (HIPPS) to protect the PaB pipeline against overpressure from the higher-pressure Longtom wells.
    • A subsea umbilical extension connected to the existing PaB umbilical line that provides electrical, hydraulic and chemical services to the Longtom wells and Longtom and Patricia Baleen pipelines.


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  • 1995 - The Longtom Gas Field was discovered by BHP
  • 2004 - Second appraisal well drilled
  • 2007 - Gas processing contract signed



  1. Patricia Baleen Operations and Maintenance
  2. Santos finalises Longtom contract
  3. VIC/P54 Operator Rejects $171 Million Hostile Takeover Bid

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