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Basker-Manta-Gummy Oil & Gas Fields (Bass Strait, Australia)


HISTORY
  • In 2H 2008, ROC acquired its interests in the Gippsland Basin via acquisition of Anzon Australia Limited.
  • ROC's Gippsland Basin producing asset comprises a 40% operating interest in VIC/L26, VIC/L27 and VIC/L28 which includes the Basker-Manta-Gummy ("BMG") Oil and Gas Fields.
  • The Basker field was discovered in 1983, Manta in 1984 and Gummy in 1990. 3D seismic was acquired in 1996. Five development wells (four producers and one gas injector) were drilled from September 2005 to May 2006. Full production commenced in December 2006.
  • Cumulative production to end-2007 was over three million barrels at an average rate of 8,700 BOPD. Peak production rates have reached in excess of 15,000 BOPD.
  • An oil producer was drilled in 2008 and production from the well commenced in September 2008.
GEOLOGY
  • Oil resources in the Basker and Manta Fields comprise stacked pay in numerous thin sands within the Latrobe Group with multiple contacts and trapped by internal seals. The sands are typically good reservoir quality.
  • Gas resources in the BMG Fields comprise both associated and non-associated gas in the Latrobe sands and non-associated gas in the deeper Golden Beach zones. Golden Beach sands are generally of modest reservoir quality.
  • Most oil-bearing zones contain a light (40o API), high GOR fluid. Gas bearing zones at Basker and Manta typically contain wet gas.
DEVELOPMENT PLAN AND FACILITIES
  • The BMG oil and gas fields are producing oil from five wells (Basker-2, -3, -5, -6 and Manta-2A). Gas is flared or re-injected into Basker-4.
  • Development wells are connected to a subsea manifold at a water depth of 158 metres, which is tied back to the FPSO “Crystal Ocean" by subsea flowlines. Production capacity is about 25,000 BOPD.
  • Oil is transferred from the FPSO by flowline to the shuttle tanker “Basker Spirit", which stores and transports oil to refineries in Victoria or by ship-to-ship transfer into the export market.
  • Plans are in place for further development in 2010. An integrated oil and gas development plan envisages a new FPSO and additional wells.
 JV PARTICIPANTS AND INTERESTS 
Anzon Australia Limited (Operator) 40%
Beach Petroleum Limited 30%
CIECO Exploration and Production (Australia) Pty Ltd 20%
Sojitz Energy Australia Pty Ltd
10% 
 

Activity Status
  • Producing.
  • Development drilling is planned to commence in 4Q 2008.
Remaining 2P Reserves
  • ROC net 27 MMBOE as at 1 April 2008 (includes best estimate gas and condensate contingent resources).
First Production
  • December 2006
Average Gross Production Rate for Half Year Ending 30 June 2008
  • 8,216 BOPD

Following the connection of Basker-6ST1 in September 2008, the field rate increased to approximately 12,500 BOPD.