Geology
Perth Basin
Abrolhos Sub-basin - The main hydrocarbon play is Permian sandstone reservoirs within fault blocks beneath the regional Kockatea Shale seal. The play fairway is interpreted to be a narrow north-south band in relatively shallow waters, and is proven by the Cliff Head field in the south.
Permit size
Perth Basin: 112km² gross (31km² net).
History
- In 2000 ROC farmed into WA-286-P, became Operator, and discovered the Cliff Head Oil Field in 2001. In October 2005 production licence WA-31-L was granted over the field. The WA-286-P exploration permit expired on 30 November 2010.
- In 2006 production commenced at the Cliff Head Oil Field in WA-31-L. In August 2010, the field produced its 10 millionth barrel of oil representing over 500,000 man-hours without a Lost Time Injury.
- From 2002 to October 2008, ROC had an operating interest in TP/15. ROC was awarded exploration permits WA-325-P and WA-327-P in 2002 which were subsequently surrendered in July 2007.
- In 2003 ROC farmed into onshore permit EP413 and L14. The exploration permit was surrendered in December 2008 but ROC retains its small, strategic interest in the Jingemia producing oil field (L14).
- In 2004 ROC was awarded, and operated, WA-349-P, which was subsequently surrendered in January 2007.
- In 2005 ROC farmed into WA-351-P in the Carnarvon Basin and sold this interest effective 1 January 2011.
- In 2007 ROC farmed into WA-381-P and WA-382-P. ROC resigned as operator effective 31 December 2009 and withdrew effective 27 April 2010.
- In 2011 ROC agreed to acquire an additional 5.0% interest in WA-31-L from CIECO Energy Australia Pty Ltd for A$4.5 million subject to working capital adjustments. The acquisition is effective 1 January 2011 and is subject to final government approval (expected 2Q 2012).
JV participants and interests
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