Geochemical Analysis of Dew Point Petroleum Systems in Browse Basin

Geochemical data details four identified Mesozoic petroleum systems in Australia's Browse Basin, characterized by their gas-condensate compositions. The analysis correlates geochemical fingerprints from source rocks and fluids with dew point petroleum systems, focusing on properties like condensate-gas ratio and gas dryness.

Use Cases

• Correlate geochemical biomarker signatures like C29 sterane and C19 tricyclic triterpane abundances to classify condensate families (e.g., W1_1BRO, W1_2BRO) for petroleum system identification.
• Analyze the relationship between dew point pressure and condensate-gas ratio (CGR) data to model fluid behavior in gas-prone reservoirs.
• Use gas dryness percentages and calculated vitrinite reflectance (Rc) values to assess thermal maturity differences between hydrocarbon accumulations like Crux and the Scott Reef Trend.
• Map the distribution of petroleum systems (e.g., Plover Formation-sourced) using geochemical data across geographic features like the Heywood Graben.

Strengths

• Identifies four distinct Mesozoic petroleum systems based on geochemical fingerprinting.
• Includes specific fluid property measurements such as condensate-gas ratios (CGR) ranging from 7 to 52 bbl/MMscf and gas dryness of 91%.
• Provides biomarker data (e.g., C29 sterane, C19 tricyclic triterpane) and carbon isotopic signatures (δ13C) for fluid family classification.

Limitations

• Data is presented in a PDF report format, not in a structured, machine-readable table.
• Sample size, row count, and column definitions are not provided, limiting direct analytical use.
• Geographic coverage is specific to the Browse Basin, Australia, reducing generalizability.

Provenance

Source

Geoscience Australia Data

Collection Method

Combined geochemical studies of source rocks and fluids with petroleum systems analysis.

Time Range

Mesozoic era.

Freshness

Last updated metadata indicates 2026-03-07.

Geography

Browse Basin, offshore Australia's North West Shelf, including the Scott Reef Trend and Heywood Graben.