Product catalogue
A new perspective on regional structural architecture across the offshore Otway Basin.
Geoscience Australia has undertaken a regional seismic mapping study of the offshore Otway Basin extending across the explored inner basin to the frontier deep-water region. Seismic interpretation covers over 18000 line-km of new and reprocessed data acquired in the 2020 Otway Basin seismic program and over 40000 line-km of legacy 2D seismic data. We present new basin-scale isochore maps that show the distribution of the Cretaceous depocentres. Maps for the Lower Cretaceous Crayfish and Eumeralla supersequences, together with those recently published for the Upper Cretaceous Shipwreck and Sherbrook Supersequences, completes the set of isochore maps for the main tectonostratigraphic basin intervals. Mapping of basement involved faults has revealed structural fabrics that have influenced depocentre development. The tectonostratigraphic development of depocentres and maps of deep crustal units delineate crustal thinning trends related to late Cretaceous extension phases. This work highlights the need to review and update structural elements. For example, the boundary between the Otway and Sorell basins is now geologically constrained. The refinements to the tectonostratigraphic evolution of the Otway Basin presented here have important implications for the distribution and potential maturity of petroleum systems, especially with regard to heat flow associated with crustal extension.
Presented at the 2024 Australian Energy Producers Conference & Exhibition (AEP)
Simple
Identification info
- Date (Creation)
- 2023-12-23T16:00:00
- Date (Publication)
- 2024-05-31T00:26:07
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149144
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Nicholson, C.
Internal Contact Author Abbott, S.
Internal Contact Author Bernardel, G.
Internal Contact Author PoudjomDjomani, Y.
Internal Contact
- Name
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Australian Energy Producers Conference and Exhibition, 20-23 May, Perth, Australia
- Purpose
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This is an extended abstract for publication in the AEP Journal and presentation at the 2024 AEP conference to promote precompetitive work undertaken in the Otway Basin.
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Nicholson, C.
Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Project
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Offshore Otway Basin precompetitive project
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- Keywords
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Otway Basin
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- Keywords
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Shipwreck Supersequence
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- Keywords
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Sherbrook Supersequence
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- Keywords
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structural architecture
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- Keywords
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Eumeralla Supersequence
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- Keywords
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basement
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- Keywords
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top lower laminated crust
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- Keywords
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reflection MOHO
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- Keywords
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basin boundaries
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- Keywords
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Crayfish Supersequence
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- Keywords
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Reflection Seismic
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- theme.ANZRC Fields of Research.rdf
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Sedimentology
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Stratigraphy (incl. biostratigraphy
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sequence stratigraphy and basin analysis)
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Seismology and seismic exploration
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Structural geology and tectonics
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Addressee
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Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
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© Commonwealth of Australia (Geoscience Australia) 2024
Resource constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
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Australian Government Security Classification System
Associated resource
- Association Type
- Informed
- Title
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Surface Grids, Isochron Grids, and Fault Maps, Offshore Otway Basin
- Citation identifier
- 146398
- Citation identifier
- f43f7c3f-d73b-45b3-8f08-db83621a9238
Associated resource
- Association Type
- Informed
- Title
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Stratigraphic framework and structural architecture of the Upper Cretaceous in the deep-water Otway Basin – implications for frontier hydrocarbon prospectivity
- Citation identifier
- 146281
- Citation identifier
- 7a937a00-9b9e-4831-a4bc-20f04eb26ebe
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Link to Abstract
Link to Abstract
- Distribution format
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- OnLine resource
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Link to Oral Presentation (Session 10)
Link to Oral Presentation (Session 10)
- Distribution format
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Resource lineage
- Statement
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<div>This extended abstract presents the results of basin analysis work undertaken in the Offshore Otway basin (specifically seismic mapping of key supersequences, crustal reflectors, faults and structural elements).</div><div><br></div><div>Seismic mapping focussed on the 2020 Otway Basin 2D grid, selected legacy 2D lines, and parts of the Otway 3D Mega merge dataset. Supersequence boundaries (including basement), deep crustal reflector, and basement-involved fault interpretations were used to generate structure surfaces and isochore maps (Fig. 2). Structural elements including revised basin boundaries are labelled in Fig. 1a. New basement involved faults, anticlines and the Cretaceous isochore map are depicted in Fig. 1b.</div><div><br></div>
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/82b3b2cc-a96f-4b1c-93b5-a66342d2a423
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Nicholson, C.
Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Conference Abstract
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/149144
- Date info (Creation)
- 2024-05-31T00:13:24
- Date info (Revision)
- 2024-05-31T00:13:24
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551