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Exploring for the Future - NDI Carrara 1 gas geochemistry: Molecular composition, carbon and hydrogen isotopes of hydrocarbon gases and the sources of molecular hydrogen and helium

Created 17/10/2025

Updated 17/10/2025

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Six gas samples were collected from the possum belly (PB) of the shaker assembly during the drilling of NDI Carrara 1. The sample depths ranged from 1187 m to 1360 m and were from organic-rich Proterozoic rock units. The molecular composition and carbon and hydrogen isotope compositions of the individual PB gas components (methane, ethane, propane and carbon dioxide) suggest that the gases were sourced from local, thermally mature, organic-rich shales and siltstones. After taking into account the air and excess nitrogen content in the PB gases, the helium content of the PB gases is low while the molecular hydrogen contents is up to over a 100 times higher than the helium content. Both molecular hydrogen and helium likely have a major radiogenic origin. Based on the results, there is potential for a yet-to-be quantified unconventional hydrocarbon resource in the vicinity of the NDI Carrara 1 well.

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Title Exploring for the Future - NDI Carrara 1 gas geochemistry: Molecular composition, carbon and hydrogen isotopes of hydrocarbon gases and the sources of molecular hydrogen and helium
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/1e38fdd6-eea4-42be-bf5a-248b585a994a
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 03/01/2022 - 30/06/2022
Geospatial Coverage
Map data © OpenStreetMap contributors
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      ],
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  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Exploring for the Future - NDI Carrara 1 gas geochemistry: Molecular composition, carbon and hydrogen isotopes of hydrocarbon gases and the sources of molecular hydrogen and helium". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/exploring-for-the-future-ndi-carrara-1-gas-geochemistry-molecular-composition-carbon-and-hydrog