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Cooper / Eromanga Basin

THE Cooper / Eromanga Basin

Beach’s operations in the Cooper-Eromanga Basin consist of Western Flank oil and gas (100% operated) and the Cooper Basin Joint Venture (33% non-operated).

The Cooper Basin covers an area of approximately 127,000 sqkm and extends across the northeast of South Australia and southwest of Queensland. The Eromanga Basin covers an area of approximately 1,000,000 sqkm and extends over South Australia, Northern Territory, Queensland and New South Wales.

The Cooper-Eromanga Basin is Australia’s most prolific oil and gas basin and continues to yield new discoveries.


Oil well being drilled in the South Australian Cooper Basin

Cooper Basin, South Australia

Cooper Basin, South Australia

Cooper Basin, South Australia


The Cooper Basin is a Permian to Triassic aged sequence of sediments deposited in a terrestrial fluvial-lacustrine environment.

The major source rock units within the Cooper Basin are the Permian aged coals and carbonaceous shales in the Patchawarra and Toolachee Formations.

Natural gas reservoirs are found in sandstones in multiple formations including the Patchawarra Formation, Epsilon Formation and Toolachee Formation.

The Triassic aged Nappamerri Group sequence provides a regional seal for the Cooper Basin and separates the Cooper Basin from the overlying Eromanga Basin.

The Eromanga Basin is Jurassic to Cretaceous in age and is a sequence of sediments of marine and fluvio-lacustrine in origin.

Oil is commonly found within the high deliverability sands of the Namur and Hutton sandstone units and is sourced from the underlying Cooper Basin.


Revised Water Impact Report for ATP 940P

Beach Energy advises that the ATP 940 2022-2025 Underground Water Impact Report (UWIR) was approved on 16 February 2023. An electronic copy of the report is available below.

If you would like a hard copy of the report, please contact us via email or phone 08 8338 2833 to arrange for a hard copy of the report to be posted to you.

Underground Water Impact report (2022-2025)


Beach has a 33% ownership interest in the Moomba CCS Project,
operated by our joint venture partner Santos. Constructed adjacent to the
Moomba Gas Plant in the Cooper Basin, the project is one of the world’s largest CCS projects and will deliver a material greenhouse gas reduction for Beach’s portfolio.

Moomba CCS remains on schedule for first CO2 injection in 2024. Upon its completion, Moomba CCS will safely store up to 1.7 million tonnes
per annum of carbon emissions in the depleted reservoirs near the Moomba
Gas Plant.

The Cooper and Eromanga basins in South Australia and Queensland have the potential for injection of over 20 million tonnes of CO2 per year for more than 50 years.

Contact us

If you have any questions regarding our program in the Cooper Basin, please contact:

For more information on the petroleum industry regulatory processes in South Australia please visit:

Department for ENERGY AND MINING