Surface Grids, Isochron Grids, and Fault Maps, Offshore Otway Basin (Updated September 2024)

During 2021–2024 Geoscience Australia conducted regional seismic mapping across the offshore Otway Basin that extended into the frontier deep-water region. This work was part of a broader pre-competitive study undertaken in support of petroleum exploration. Seismic horizons and faults were interpreted on three regional data sets, including: over 18 000 line-km of new and reprocessed data compiled for the 2020 offshore Otway Basin seismic program; over 40 000 line-km of legacy 2D seismic data; and the Otway 3D Megamerge dataset. This digital dataset (publication date 9 September 2024) updates and replaces a previously released dataset (publication date 16 May 2022). This updated dataset includes 8 surface grids and 11 isochron grids generated from the following seismic horizons (in ascending stratigraphic order); MOHO (Mohorovičić discontinuity), TLLCC (top laminated lower continental crust), Base (base Crayfish Supersequence), EC2 (base Eumeralla Supersequence), LC1 (base Shipwreck Supersequence), LC1.2 (base LC1.2 Sequence), LC2 (base Sherbrook Supersequence), and T1 (base Wangerrip Supersequence). Fault polygons created for all surfaces (except for MOHO, TLLCC, and LC1.2) are also included in the dataset. Maps generated from the dataset depict deep-water Cretaceous depocentres, and trends in crustal thinning and rifting during the Cretaceous. This revised dataset has underpinned updates to regional structural elements, including a revision of the boundary between the Otway and Sorell basins.

Simple

Identification info

Date (Creation)
2022-03-15T11:00:00
Date (Revision)
2022-05-16T02:46:30
Date (Publication)
2024-09-09
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/146398

Citation identifier
Digital Object Identifier/https://dx.doi.org/10.26186/146398

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Purpose

The purpose of this product is to provide digital surface grids, isochron grids, and fault maps for the Offshore Otway Basin that industry and academic stakeholders can use and integrate in their own regional prospectivity studies in the area.

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Nicholson, C.

 Internal Contact
Resource provider

Minerals, Energy and Groundwater Division

 External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Temporal extent

Time period
2020-02-05 2022-05-16
Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Website

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

  • Offshore Energy Systems

Project

  • Deepwater Otway Basin study

Project

  • 2020 Otway Basin seismic program

Keywords

  • Otway Basin

Keywords

  • structural architecture

Keywords

  • stratigraphic architecture

Keywords

  • seismic interpretation

Keywords

  • structural elements

Keywords

  • hydrocarbon prospectivity

theme.ANZRC Fields of Research.rdf

  • Basin Analysis

  • Earth Sciences not elsewhere classified

  • Geology not elsewhere classified

  • Petroleum and Coal Geology

  • Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy)

  • Structural Geology

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee
Role Organisation / Individual Name Details
User

Any
Use constraints
License
Use constraints
Other restrictions
Other constraints

(c) Commonwealth of Australia (Geoscience Australia) 2021

Resource constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Classification system

Australian Government Security Classification System

Associated resource

Association Type
Dependency
Title

Stratigraphic and Structural architecture of the deepwater Otway Basin Upper Cretaceous - implications for frontier hydrocarbon prospectivity

Citation identifier
146281

Citation identifier
7a937a00-9b9e-4831-a4bc-20f04eb26ebe

Website

https://pid.geoscience.gov.au/dataset/ga/146281

Link to eCat metadata record landing page

Associated resource

Association Type
Dependency
Title

A new perspective on regional structural architecture across the offshore Otway Basin.

Citation identifier
149144

Citation identifier
82b3b2cc-a96f-4b1c-93b5-a66342d2a423

Website

http://pid.geoscience.gov.au/dataset/ga/149144

Link to eCat metadata record landing page

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice
OnLine resource

Download Metadata Statement (pdf) [8.2 MB]

Download Metadata Statement (pdf) [8.2 MB]

Distribution format

  • pdf

    File decompression technique

    nil

OnLine resource

Download Data (zip) [190.5 MB]

Download Data (zip) [190.5 MB]

Distribution format

  • pdf bil hdr stx dat asc dbf shp shx prj cpg sbn hdr

    File decompression technique

    unzip

Resource lineage

Statement

This data is the result of regional seismic interpretation on offshore 2D seismic datasets. Key Upper Cretaceous supersequences where interpreted on 2D seismic data and tied to wells in Petrel software. Surfaces were then exported as ascii files from Petrel, imported to Petrosys where isochrones were generated. Faults were extracted from Petrel as shape files. All surfaces and isochrons are available as XYZ asci files.</br></br>

If a copy of the pre-September 2024 version (V2) of this data is required it can be obtained by request to clientservices@ga.gov.au clientservices@ga.gov If a copy of the pre-September 2024 version (V2) of this data is required it can be obtained by request to clientservices@ga.gov.au

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/f43f7c3f-d73b-45b3-8f08-db83621a9238

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Nicholson, C.

 Internal Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/146398

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/f43f7c3f-d73b-45b3-8f08-db83621a9238

Metadata linkage

https://ecat.ga.gov.au/geonetwork/dashboard/eng/catalog.search#/metadata/f43f7c3f-d73b-45b3-8f08-db83621a9238

Date info (Creation)
2022-05-16T01:45:29
Date info (Revision)
2022-05-16T01:45:29

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

2020 Otway Basin seismic program Deepwater Otway Basin study Offshore Energy Systems
theme.ANZRC Fields of Research.rdf
Basin Analysis Earth Sciences not elsewhere classified Geology not elsewhere classified Petroleum and Coal Geology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Structural Geology

Provided by

Access to the portal

Associated resources

Not available