Eromanga Basin

Detailed Report
Petroleum Geology of South Australia
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 eromanga Basin Location Map
Age Early Jurassic - Late Cretaceous
Area in South Australia 360 000 km2 (139 000 sq. miles)
Depth to target zones 1200 - 3000 m
Thickness Up to 3000 m
Hydrocarbon shows Commercial discoveries of oil from almost every unit from the Poolowanna to the base Cadna-owie Formation in the Cooper region; elsewhere shows in the Poolowanna Formation
First commercial discovery 1976 gas (Namur 1), 1978 oil (Strzelecki 3)
Identified reserves Cooper region; elsewhere - nil
Undiscovered resources (50% prob.) 2.4 x 106 (15.1 mmbbl); western Eromanga basin 8.4 x 106 (52.8 mmbbl) (PIRSA estimate June 1996)
Production Cooper region - refer to Cooper Basin; elsewhere nil
Basin type Intracratonic
Depositional setting Productive non-marine sequence overlain by non-productive marine, marginal marine and non-marine sediments
Reservoirs Braided and meandering fluvial, shoreface and lacustrine turbidite sandstones
Regional structure Broad, four-way dip closed anticline trends in regional sag basin
Seals Lacustrine - floodplain shales and basin-wide volcanogenic sandstones
Source rocks Non Underlying Cooper Basin coal and siltstone; Birkhead and Murta Formations' siltstone and coal
Depth to oil/gas window 1250 m (oil)
Number of wells More than 1800 in Cooper region; ~30 elsewhere
Seismic line km 104 689 2D , 9 787 3D km2

 

Previous Acreage Releases
Eromanga Basin Prospects Inventory, Blocks ER97- A to C, Exploration opportunity     (.PDF) 9.69MB
Eromanga Basin Acreage Release ER96A-D 1996     (.PDF) 2.35MB
South Eromanga Basin Area F 1989     (.PDF) 1.47MB