Pedirka and western Eromanga basins depth and isochore maps - Data package and explanatory notes

Authors / CoAuthors

Abstract

<div>This data package provides depth and isochore maps generated in support of the energy resource assessments under the Australia’s Future Energy Resources (AFER) project. Explanatory notes are also included.</div><div><br></div><div>The AFER project is part of Geoscience Australia’s Exploring for the Future (EFTF) Program—an eight year, $225 million Australian Government funded geoscience data and precompetitive information acquisition program to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, Geoscience Australia is building a national picture of Australia’s geology and resource potential. This will help support a strong economy, resilient society and sustainable environment for the benefit of all Australians. The EFTF program is supporting Australia’s transition to a low emissions economy, industry and agriculture sectors, as well as economic opportunities and social benefits for Australia’s regional and remote communities. Further details are available at http://www.ga.gov.au/eftf.</div><div><br></div><div>The depth and isochore maps are products of depth conversion and spatial mapping seismic interpretations by Szczepaniak et al. (2023) and Bradshaw et al. (2023) which interpreted 15 regional surfaces. These surfaces represent the top of play intervals being assessed for their energy resource potential (Figure 1). These seismic datasets were completed by play interval well tops by Bradshaw et al. (in prep), gross depositional environment maps, zero edge maps by Bradshaw et al. (in prep), geological outcrop data as well as additional borehole data from Geoscience Australia’s stratigraphic units database.</div><div><br></div><div>Depth and isochore mapping were undertaken in two to interactive phases; </div><div><br></div><div>1.    A Model Framework Construction Phase – In this initial phase, the seismic interpretation was depth converted and then gridded with other regional datasets. </div><div><br></div><div>2.    A Model Refinement and QC Phase – This phase focused on refining the model and ensuring quality control. Isochores were generated from the depth maps created in the previous phase. Smoothing and trend modelling techniques were then applied to the isochore to provide additional geological control data in areas with limited information and to remove erroneous gridding artefacts. </div><div><br></div><div>The final depth maps were derived from isochores, constructing surfaces both upward and downward from the CU10_Cadna-owie surface, identified as the most data-constrained surface within the project area. This process, utilizing isochores for depth map generation, honours all the available well and zero edge data while also conforming to the original seismic interpretation.</div><div><br></div><div>This data package includes the following datasets: </div><div><br></div><div>1)   Depth maps, grids and point datasets measured in meters below Australian Height Datum (AHD, for 15 regional surfaces (Appendix A). </div><div>2)   Isochore maps, grids and point datasets measured in meters, representing 14 surfaces/play internals (Appendix B).</div><div> </div><div>These depth and isochore maps are being used to support the AFER Project’s play-based energy resource assessments in the Pedirka and western Eromanga basins, and will help to support future updates of 3D geological and hydrogeological models for the Great Artesian Basin by Geoscience Australia.</div><div><br></div>

Product Type

dataset

eCat Id

149124

Contact for the resource

Resource provider

Point of contact

Commonwealth of Australia (Geoscience Australia)
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

Point of contact

Digital Object Identifier

https://dx.doi.org/10.26186/149124

Keywords

( Project )

Australia's Future Energy Resources project

( Project )

EFTF – Exploring for the Future

Northern Territory

South Australia

Queensland

Cretaceous

Jurassic

Mesozoic

Permian

Great Artesian Basin

Eromanga Basin

Pedirka Basin

Simpson Basin

groundwater

Energy

Purni Formation

Walkandi Formation

Peera Peera Formatoin

Hutton Sandstone

Birkhead Formation

Adori Sandstone

Westbourne Formation

Namur Sandstone

Murta Formation

Algebuckina Sandstone

De Souza Sandstone

Cadna-owie Formation

Wallumbilla Formation

Bulldog Shale

Coorikiana Sandstone

Toolebuc formation

Allaru Mudstone

Oodnadatta Formation

Mackunda Formation

Winton Formation

Purni formation

Depth Map

Crown Point Formation

Poolowanna Formtion

theme.ANZRC Fields of Research.rdf

Sedimentology

Published_External

Publication Date

2024-02-28T03:28:28

Creation Date

Security Constraints

Australian Government Security Classification System

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence

Use - license otherRestrictions

Status

completed

Purpose

Release data sets associated with Australia's Future Energy Resources project under the EFTF Program.

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

<div>This package provides depth and isochore maps used to support the AFER Project’s play-based energy resource assessments in the Pedirka and western Eromanga basins, and will help to support future updates of 3D geological and hydrogeological models for the Great Artesian Basin by Geoscience Australia.</div>

Parent Information

Extents

[28, 23, 140, 133]

Reference System

GDA94 / geographic 2D (EPSG: 4283)

Spatial Resolution

Service Information

Associations

Downloads and Links

Download the data package (zip) [1.4 GB]

Source Information