Browse Basin

The Browse Basin lies offshore of North Western Australia and covers an area of approximately 140,000 km2

History

The Burnside gas discovery was made in 2009 by Beach and its joint-venture partners. A gross gas column is evident over a 65 metre thick sand and pressure data acquired in the reservoir section supports the potential for the gas column to be stratigraphically trapped over a large area. Ongoing studies are directed toward assessing the significance of this gas discovery. 

Geology

The Browse Basin is a north-east to south-west trending basin filled with Palaeozoic, Mesozoic and Cenozoic aged sediments. Its eastern boundary is defined by the Proterozoic aged Kimberly Craton whilst it grades into the Bonaparte Basin to the northeast and the Canning Basin to the southwest. It extends offshore as far as the Ashmore Platform and Scott Plateau.

The Browse Basin developed as an extensional basin in the Palaeozoic with fluvio-deltaic and marine sediments deposited from this time though to the Jurassic. Significant structural activity due to a further extensional phase took place in the Jurassic with sedimentation recommencing in the late Jurassic and continuing mostly uninterrupted into the Tertiary. Source rocks are recognised in Permian through to early Cretaceous aged sequences. The best developed reservoirs are within the fluvio-deltaic Middle-Early Jurassic section and Cretaceous aged submarine fans.