Publication Name: The Cooper & Eromanga Basins Australia
Authors: A.P. Dodman and J.T. Rodrigues
Date Published: June 1989
Number of Pages: 23
Reference Type: Book Section
Abstract:
The Jackson Oil Field in south-western Queensland contains about 111 million barrels of oil in place (17 .64million kL) in three reservoirs - the Cretaceous Murta Member, the Jurassic Westbourne Formation and the
Jurassic Hutton Sandstone. To 30 November 1988, 24 million barrels of oil (3.8 million kL), or 59 per cent of
the expected uliimate primary recovery, had been produced from the reservoirs. The production performance of the Hutton and Westbourne reservoirs in particular has shown them to be more complex than was initially supposed.
Electric submersible pumps and water shut-off treatments have been used to improve the oil production rate and drainage of the heterogeneous Hutton reservoir. Pressure monitoring wells and Repeat Formation Test
surveys have been used to define the behaviour of the Hutton aquifer because conventional pressure buildup tests do not provide reliable estimates of reservoir pressure.
Conventional logging and testing procedures have been found to be inadequate to describe the thin sands of the
Westbourne Formation. High densiry perforations appear necessary in some cases to adequately access these sands. Additional drilling and recompletions are being planned to improve drainage of the multi-reservoir Westbourne Formation.