Permit EP 325 is located in the Exmouth Gulf and is divided into two separate portions. The western portion extends onshore onto the mainland around the eastern side of Northwest Cape. This portion contains the Rivoli Gas Field located in about 20 metres of water. The eastern portion covers both offshore and land on the eastern side of the Gulf. The total area of the permit is 1263 km2. Water depths are between 15m and 20m.
The Rivoli Gas Field is a four‐way dip closure at the Birdrong Sandstone reservoir with a gas column overlying a thin oil leg. The Rivoli Gasfield has been independently assessed by the Independent Geologist to contain a Contingent Gas Resource of 8.9 Bcf to 13.8 Bcf with a mean of 11.2 Bcf.
The permit is covered by several vintages of 2D seismic. The most recent shot was in 2005. Apart from Rivoli 1, the permit contains the Cassidy 1, Cody 1, Cooper 1, Spider 1, Urala 1 and White Opal 1 wells.
Prospects and Leads
The Rivoli gas field is underlain by a rotated fault block of Jurassic and Triassic sediments. The Rivoli Deep lead is a 63.6 Bcf gas prospect. The Rivoli East lead is a 3 way dip structure sealed against a north‐ northeast trending and westerly dipping fault and is 32.6MMbbls oil prospect. The Big Horn lead is a 3 way dip structure sealed against a north‐northeast trending and westerly dipping fault and is a 248.6Bcf gas prospect.