Browse Basin Hydrocarbon Source Analysis via GCxGC-TOFMS and CSIA

Geoscience Australia Data published a study on March 25, 2026, combining two-dimensional gas chromatography and compound-specific isotope analysis. The research analyzes diamondoids, n-alkanes, and aromatic hydrocarbons to identify multiple hydrocarbon sources in Australia's offshore Browse Basin. It focuses on distinguishing contributions from non-biodegraded and biodegraded oil fields.

Use Cases

• Identify mixed hydrocarbon sources in oil accumulations based on diamondoid concentrations and isotopic composition.
• Distinguish biodegraded from non-biodegraded oil signatures based on biomarker and diamondoid data.
• Model basin charge history based on source-specific diamondoid ratios resistant to thermal maturity.
• Correlate gas escape events with fluid composition based on high diamondoid concentrations in oil-only fields.

Strengths

• Data is derived from advanced analytical techniques (GCxGC-TOFMS and CSIA) that minimize compound interference.
• Focuses on diamondoid metrics, which are described as source-specific and resistant to biodegradation.
• Analysis includes both non-biodegraded (Caswell) and biodegraded (Cornea, Gwydion) oil fields for comparison.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is presented in PDF format, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Combined comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GCxGC-TOFMS) and compound-specific isotope analyses (CSIA).

Time Range

Study references literature from 1999 to 2016, but primary data collection date is unspecified.

Freshness

Last updated 2026-03 25 15:25:30.060955; freshness should be verified.

Geography

Browse Basin, offshore Northwest region of Australia.