Regional Geology of the Northern Carnarvon Basin

The Northern Carnarvon Basin represents Australia’s westernmost offshore province of the Westralian Superbasin comprising also the Browse, Roebuck, Offshore Canning and Bonaparte basins, collectively known as basins of the North West Shelf (Figure 1). The Northern Carnarvon Basin covers an area of approximately 535 000 km2, predominantly offshore, in water depths of up to 4500 m (Figure 2). It contains a Paleozoic, Mesozoic and Cenozoic sedimentary succession up to 15 000 m thick, which is dominated by deltaic to marine siliciclastics and shelfal carbonates of Mesozoic to Cenozoic age. Two Mesozoic petroleum supersystems (Westralian 1 and Westralian 2) have been identified and numerous commercial oil and gas discoveries have been made within the basin. The basin is Australia’s premier hydrocarbon producing province and contains an established network of oil, condensate and gas production infrastructure (Figure 4). As of February 2021, the total oil and natural gas liquids and natural gas and ethane reserves (proved and probable) for the Carnarvon Basin are 597 MMbbls (106.84 GL) and 42 296 PJ, respectively (EnergyQuest, 2021).

Download Report [DOCX 182.8 KB] Download Figures [ZIP 118.9 MB]

For information on the 2021 acreage release areas in the Northern Carnarvon Basin visit the Department of Industry, Science, Energy and Resources website.