Hyperspectral Mineralogy of Hydrocarbon Source Rocks in the Georgina Basin

Hyperspectral logging data from 13 wells characterizes the mineralogy of middle Cambrian marine sediments prospective for oil and gas in Australia's southern Georgina Basin. The dataset, provided by the Australian Ocean Data Network, maps key source rock units like the Arthur Creek Formation by analyzing spectral properties such as Short-Wave Infrared reflectance and spectral contrast. These 2026 findings link mineralogy to geophysical logs, differentiating organic-rich shale units.

Use Cases

• Correlate gamma log intensity peaks with elevated total organic carbon content and decreased carbonate contribution from spectral data.
• Differentiate organic-rich shale units within the Arthur Creek Formation using combined hyperspectral mineralogy and wireline log data.
• Map spatial heterogeneity of prospective formations by analyzing distributions of quartz, carbonate, and white-mica contents across synclines.
• Characterize source rock units like the Thorntonia Limestone based on Short-Wave Infrared reflectance and spectral contrast metrics.

Strengths

• Data covers 13 petroleum, mineral, and stratigraphic wells providing multi-well analysis.
• Integrates hyperspectral logging with wireline log data for multi-modal geological interpretation.
• Focuses on key hydrocarbon source rock units within a defined geological period (middle Cambrian).

Limitations

• Sample size is limited to 13 wells, which may not capture full basin heterogeneity.
• Formation boundaries are noted as 'often but not always' distinct in mineralogy, indicating some ambiguity.
• Specific row counts, column details, and data formats beyond HTML are unknown.

Provenance

Source

Australian Ocean Data Network

Collection Method

Hyperspectral logging data collected by HyLoggerTM instruments from well cores, evaluated alongside spectral data, X-ray diffraction data, and wireline logs.

Time Range

Focuses on middle Cambrian geological period.

Freshness

Last updated in April 2026.

Geography

Southern Georgina Basin, covering the Dulcie and Toko synclines in Northern Territory and Queensland, Australia.