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Geology and Petroleum Potential of the Bremer Sub-basin, Offshore Southwestern Australia

Created 17/10/2025

Updated 17/10/2025

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The Bremer Sub-basin, which forms part of the Bight Basin off the southern coast of Western Australia, is a deep-water (100-4000 m water depth) frontier area for petroleum exploration. No wells have been drilled to test the sub-basin's petroleum potential, with company exploration limited to a regional seismic survey by Esso Australia Ltd in 1974. Early studies identified the Bremer Subbasin as a series of Middle Jurassic-Early Cretaceous half graben, which contain potentially prospective structures for trapping hydrocarbons. However, a lack of sub-surface geological data, along with the deep-water setting, discouraged exploration of this area for over 30 years. In 2003, the Bremer Sub-basin was identified as a key frontier area in Geoscience Australia's New Oil Program where new exploration opportunities might occur. Subsequently, Geoscience Australia's Bremer Sub-basin Study commenced in 2004 with an aim to determine if the sub-basin formed under suitable geological conditions to generate and trap large volumes of hydrocarbons.

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Additional Info

Field Value
Title Geology and Petroleum Potential of the Bremer Sub-basin, Offshore Southwestern Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/c49ac20b-c7c3-4930-a642-7c90c19340f6
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 30/06/2025
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        116.0,
        -37.0
      ],
      [
        122.0,
        -37.0
      ],
      [
        122.0,
        -33.0
      ],
      [
        116.0,
        -33.0
      ],
      [
        116.0,
        -37.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Geology and Petroleum Potential of the Bremer Sub-basin, Offshore Southwestern Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/geology-and-petroleum-potential-of-the-bremer-sub-basin-offshore-southwestern-australia1