Authors / CoAuthors
Abbott, S. | Cubitt, C. | Bernardel, G. | Nicholson, C. | Nguyen, D. | Mackie, S.
Abstract
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/)
Product Type
document
eCat Id
149180
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Keywords
- ( Project )
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- Unfunded pre-competitive geoscience
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- Otway Basin
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- Cretaceous
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- Shipwreck Supersequence
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- Sherbrook Supersequence
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- Austral 3 Petroleum System
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- gross depositional environment
- theme.ANZRC Fields of Research.rdf
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- Resource geoscienceStratigraphy (incl. biostratigraphysequence stratigraphy and basin analysis)
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- Published_External
Publication Date
2024-06-20T02:43:50
Creation Date
2024-01-24T20:00:00
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Status
completed
Purpose
2024 AEP Conference extended abstract, published in The AEP Journal.
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asNeeded
Topic Category
geoscientificInformation
Series Information
Australian Energy Producers (AEP) Conference & Exhibition 20-23 May 2024, Perth WA
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<div>This will be a permanent record once published in The Australian Energy Producers Journal 2024. The uploaded draft will need to be replaced with the final published version after May 20 2024.</div>
Parent Information
Extents
[-41.0862, -36.6116, 135.4218, 145.9969]
Reference System
Spatial Resolution
Service Information
Associations
Association Type - wasInformedBy
Surface Grids, Isochron Grids, and Fault Maps, Offshore Otway Basin
eCat Identifier - 146398,
UUID - f43f7c3f-d73b-45b3-8f08-db83621a9238
Association Type - wasInformedBy
The Northwest Offshore Otway Basin Well Folio
eCat Identifier - 146429,
UUID - 0ec999a2-1f5f-4f6a-8ca6-5922feeef453
Association Type - wasInformedBy
Cretaceous depositional environment interpretation of offshore Otway Basin cores and wireline logs application to the generation of basin scale gross depositional environment maps
eCat Identifier - 147677,
UUID - d4e070d3-6bdb-4c73-b8c5-3cda86205dfe
Association Type - wasInformedBy
Towards a regional understanding of Sherbrook Supersequence Gross Depositional Environments, offshore Otway Basin
eCat Identifier - 147395,
UUID - edda89ce-171f-45ac-bf42-c6619c241526
Source Information