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Hydrocarbon generation potential in the Otway Basin, Australia

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Created 14/01/2025

Updated 14/01/2025

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The Otway Basin is a rifted margin basin containing a sequence of Mesozoic to Tertiary sediments up to 7500 m thick, resting on a Palaeozoic metasedimentary and granitic basement. Hydrocarbon shows are common throughout the basin, the most significant occurrences being small gas fields in basal upper Cretaceous sandstone in the eastern part of the basin, one of which is in commercial production, and a 3 m oil column in Lindon 1 in basal Tertiary sandstone in the central basin area. A lack of commercial oil discoveries in twenty-five years of active exploration and the small size of the known gas fields, together with uncertainty about source rock quality and maturation levels, have tended to downgrade the petroleum potential of the Otway Basin. Geochemical data, mainly from the Cretaceous sequence, indicate that both Upper and Lower Cretaceous rocks have fair quality gas source potential. Some thin beds of oil-prone source rocks may be present, mainly in the Lower Cretaceous and lower Tertiary sequences. Cretaceous structural development appears to have exerted a strong control on maturation throughout the basin. Hydrocarbons formed early in the basins history are unlikely to have been preserved.

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Title Hydrocarbon generation potential in the Otway Basin, Australia
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/c42f0167-6eef-4079-9314-8435c571e3fc
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[138.25, -44.0], [145.25, -44.0], [145.25, -36.75], [138.25, -36.75], [138.25, -44.0]]]}
Data Portal data.gov.au