Browse Basin Petroleum Fluid Analysis Using Diamondoids and Semi-Volatile Aromatics

Geoscience Australia research applies comprehensive two-dimensional gas chromatography (GC × GC-TOFMS) to whole oil samples from Australia's Browse Basin. The study utilizes semi-volatile aromatic compounds and diamondoids to identify mixed hydrocarbon sources and complex fill histories in accumulations like the Cornea field and Gwydion-1.

Use Cases

• Correlate hydrocarbon fluid sources using concentrations of methyladamantanes and methyldiamantanes from GC × GC-TOFMS data.
• Assess fluid maturity and mixing in biodegraded accumulations by analyzing aromatic maturity ratios and stable carbon isotopic composition (δ13C) of alkylbenzenes.
• Model basin fill history by identifying high-maturity, Plover Formation-sourced fluids in condensates from wells like Kronos-1 and Dinichthys North-1.
• Discriminate between fluids from different Jurassic source rocks (e.g., Plover, Vulcan formations) using semi-volatile aromatic compound profiles.

Strengths

• Data is derived from a peer-reviewed study published in Marine and Petroleum Geology, providing authoritative scientific grounding.
• Analysis employs advanced GC × GC-TOFMS instrumentation for detailed compound separation and identification.
• Research focuses on compounds like semi-volatile aromatics and diamondoids that represent a significant proportion of the bulk fluid, enhancing correlation reliability.

Limitations

• Sample scope is limited to specific accumulations within the Browse Basin (e.g., Cornea, Gwydion-1, Mimia-1), limiting geographic generalizability.
• The underlying chromatographic and isotopic data tables are not provided in the HTML publication, requiring extraction or sourcing from the original study.

Provenance

Source

Geoscience Australia Data, originating from a published research article.

Collection Method

Laboratory analysis of whole oil/condensate samples using GC × GC-TOFMS.

Time Range

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Freshness

Study published in 2020; metadata record last updated in 2026.

Geography

Browse Basin, North West Shelf, Australia.