Stag Oil Field

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Australia Oil & Gas Fields

Quadrant Oil & Gas Fields

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Summary Information

  • Operator: Quandrant
  • Country: Australia
  • Location: Carnarvon Basin
  • Production start: 1998
  • Partners: Santos
  • Type: Oil / Gas
  • Estimated Reserves:
  • Production Volume:


  • The Stag facility is located in Commonwealth Waters approximately 60 km north-west of Dampier and 64 km north-east of the Montebello Islands on the North West Shelf of Western Australia. Water depth over the field is approximately 49 m.
  • The facility consists of:
    • A fixed Central Production Facility (CPF), producing and processing oil from a series of wells;
    • A single 2 km long carbon steel export oil pipeline on the northeast side of the CPF connecting to a Catenary Anchor Leg Mooring (CALM) buoy;
    • Water injection flowlines and wells to assist reservoir fluid recovery;
    • A Floating Storage and Offload tanker (FSO), the Dampier Spirit FSO, from which oil is exported by trading tankers;
  • The CPF consists of a six-leg jacket piled to the seabed upon which a six-leg barge type deck structure is installed.
  • The platform stands approximately 20m above sea level (excluding cranes and flares).
  • The CPF is located above the original Stag-6H well


  • Teekay: Provision of the Dampier Spirit FSO
  • Keppel: FSO Conversion
  • Samsung: Central Processing Platform


  • 1993 - Stag Oil Field discovered
  • 1998 - Oil production commenced
  • 2003 - Santos increased it stake to 66.67%
  • 2015 - Quadrant Energy acquired Apache's share


  • The area of shelf within the Stag field is characterised by a thick sequence of carbonate rock that is overlain by thin layers of unconsolidated fine to medium grained, carbonate sediments with occasional shell or gravel patches


  1. Stag-44H, Stag-45H and Stag-46 Environment Plan Summary
  2. WA-15, Environment Plan Summary
  3. Santos, Carnarvon Basin
  4. Offshore Oil And Gas Production Platforms In Australia
  5. Samsung Platform References
  6. International Protective Coatings Platform References
  7. Jotun FPSO References
  8. Santos to increase interest in Stag oil field
  9. Apache Agrees To Sell Australian Operations For $2.1 Billion

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