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Shipwreck and Sherbrook Supersequence Regional Gross Depositional Environments, offshore Otway Basin

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Created 13/01/2025

Updated 13/01/2025

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The Shipwreck and Sherbrook supersequences together constitute the upper Cretaceous succession in the Otway Basin that was deposited during an extensional basin phase. In the Shipwreck Trough, where the upper Cretaceous succession is well explored, gas fields are hosted by the Shipwreck Supersequence (SS). Elsewhere, the upper Cretaceous interval is lightly explored, and the deep-water area is considered an exploration frontier. We present regional gross depositional environment (RGDE) maps for the LC1.1 and LC1.2 sequences of the Shipwreck SS, and the LC2 Sherbrook SS. Fluvial Plain, Coastal-Delta Plain and Shelf RGDEs were interpreted from wireline logs, cores, and seismic facies. The Fluvial Plain and Coastal-Delta Plain RGDEs are mostly restricted to the inboard platform areas and the inner Morum Sub-basin. The mud-prone Shelf RGDE is widespread across the deep-water Morum and Nelson depocentres. The extent of the Fluvial and Coastal-Delta Plain belts progressively increases up-section, imparting a regressive aspect to the succession, and delineating a large fluvial-deltaic complex in the north-west of the basin. Thick seal development across the greater Shipwreck Trough, potentially mature source rocks in the deep-water basin, and thick reservoir development in the hanging wall of growth faults in the inner Morum Sub-basin are insights derived from this study, and will inform area selection for detailed gross depositional environment mapping, formulation of new hydrocarbon and carbon dioxide storage plays, and inputs for petroleum systems modelling. Presented at the Australian Energy Producers (AEP) Conference & Exhibition (https://energyproducersconference.au/conference/)

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Title Shipwreck and Sherbrook Supersequence Regional Gross Depositional Environments, offshore Otway Basin
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/920ccd4c-86f7-45aa-8801-d8dc065fcfb7
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 17/06/2024
Geospatial Coverage {"type": "Polygon", "coordinates": [[[135.4218, -41.0862], [145.9969, -41.0862], [145.9969, -36.6116], [135.4218, -36.6116], [135.4218, -41.0862]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Shipwreck and Sherbrook Supersequence Regional Gross Depositional Environments, offshore Otway Basin". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/shipwreck-and-sherbrook-supersequence-regional-gross-depositional-environments-offshore-otway-b

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