Authors / CoAuthors
Edwards, D.S. | Buckler, T. | Boreham, C.J. | Grosjean, E.
Abstract
<p>Geoscience Australia's Oracle organic geochemical database comprises analytical results for samples relevant to petroleum exploration, including source rocks, crude oils and natural gases collected across the Australian continent. The data comprises organic chemical analyses of hydrocarbon-bearing earth materials as well as including connectivity to some inorganic analyses. These data enable petroleum fluids to be typed into families and correlated to their source rock, from which depositional environment, age, and migration distances can be determined, and hence the extent of the total petroleum system can be mapped. This comprehensive data set is useful to government for evidence-based decision making on natural resources and the petroleum industry for de-risking conventional and unconventional petroleum exploration programs. <p>The data are produced by a wide range of analytical techniques. For example, source rocks are evaluated for their bulk compositional characteristics by programmed pyrolysis, pyrolysis-gas chromatography and organic petrology. Natural gases are analysed for their molecular and isotopic content by gas chromatography (GC) and gas chromatography-temperature conversion-mass spectrometry (GC-TC-IRMS). Crude oils and the extracts of source rocks are analysed for their bulk properties (API gravity; elemental analysis) and their molecular (biomarkers) and isotopic (carbon and hydrogen) content by GC, gas chromatography-mass spectrometry (GCMS) and GC-TC-IRMS. <p>The sample data originate from physical samples, well completion reports, and destructive analysis reports provided by the petroleum industry under the Offshore Petroleum and Greenhouse Gas Storage Act (OPGGSA) 2006 and previous Petroleum (submerged Lands) Act (PSLA) 1967. The sample data are also sourced from geological sampling programs in Australia by Geoscience Australia and its predecessor organisation's Australian Geological Survey Organisation (AGSO) and Bureau of Mineral Resources (BMR), and from the state and territory geological organisations. Geoscience Australia generates data from its own laboratories. Other open file data from publications, university theses and books are also included <b>Value:</b> The organic geochemistry database enables digital discoverability and accessibility to key petroleum geochemical datasets. It delivers open file, raw petroleum-related analytical results to web map services and web feature services in Geoscience Australia’s portal. Derived datasets and value-add products are created based on calculated values and geological interpretations to provide information on the subsurface petroleum prospectivity of the Australian continent. For example, the ‘Oils of Australia’ series and the ‘characterisation of natural gas’ reports document the location, source and maturity of Australia’s petroleum resources. Details of the total petroleum systems of selected basins studied under the Exploring for the Future project can be found in the Petroleum Systems Summaries Tool in Geoscience Australia’s portal. Related Geoscience Australia Records and published papers can be obtained from eCat. <b>Scope:</b> The collection initially comprised organic geochemical and petrological data on organic-rich sedimentary rocks, crude oils and natural gas from petroleum wells drilled in the onshore and offshore Australian continent. Over time, other sample types (ground water, fluid inclusions, mineral veins, bitumen) from other borehole types (minerals, stratigraphic – including the Integrated Ocean Drilling Program), marine dredge samples and field sites (outcrop, mines, surface seepage samples) have been analysed for their hydrocarbon content and are captured in the database. Results for many of the oil and gas samples held in the Australian National Offshore Wells Data Collection are included in this database.
Product Type
dataset
eCat Id
34313
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Resource provider
Keywords
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- HVC_144673
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
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- Petroleum geochemistry
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- Organic geochemistry
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- Pyrolysis
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- Biomarkers
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- Stable carbon isotopes
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- Crude oil
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- Natural gas
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- Source rock
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- Petroleum
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- Organic petrology
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- Macerals
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- Vitrinite reflectance
Publication Date
2020-04-15T04:15:23
Creation Date
2000-01-01T00:00:00
Security Constraints
Legal Constraints
Status
Purpose
These database comprises raw organic geochemistry values generated for Australian source rocks, crude oil and natural gases and is the only public comprehensive national database of its kind. It delivers open file data to web map services and web feature services in the Exploring for the Future (EFTF) portal at https://portal.ga.gov.au/ Derived datasets are provided as links from the collection and via Tools in Geoscience Australia's portal. Interpretation of these data enable petroleum fluids to be typed into families and correlated to their source rock, from which migration distances and the age can be determined. Hence, the extent of the total petroleum system can be mapped.
Maintenance Information
unknown
Topic Category
geoscientificInformation
Series Information
Lineage
The database structure has evolved over time and will keep changing as the needs of the database Clients change, different types of analytical data become available, and the delivery platform changes. Data was initially delivered through the Petroleum Wells web page http://dbforms.ga.gov.au/www/npm.well.search, which will be decommissioned. Since September 2019, data delivery is through the Geoscience Australia portal which has necessitated developmental changes to the oracle table structure and delivery mechanisms: this upgrade is continuing under the Exploring for the Future program and aims to be completed by 2024. <a href="https://portal.ga.gov.au/">https://portal.ga.gov.au/</a>
Parent Information
Extents
[-44.00, -9.00, 112.00, 154.00]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Source Information
Source data not available.