Hydrocarbon Expulsion Models for Browse Basin Petroleum Systems

Subsidence and thermal history analysis of 31 wells and 25 depocentre sites provides insights into Jurassic and Early Cretaceous petroleum systems in Australia's Browse Basin. The models incorporate new palaeo-bathymetric estimates and kerogen kinetic data to examine generation and expulsion history. Findings suggest multiple effective gas sources, with significant oil expulsion largely restricted to the Heywood Graben and Seringapatam Sub-basin.

Use Cases

• Assessing hydrocarbon charge risk in the Heywood Graben based on modelled Tertiary oil expulsion from Jurassic formations.
• Evaluating source rock quality sensitivity in the Seringapatam Sub-basin using modelled oil and gas expulsion scenarios.
• Calibrating regional basin models with new palaeo-bathymetric estimates and kerogen kinetic data.
• Interpreting geochemical indicators (e.g., GOI data) from specific wells like North Scott Reef-1 within the context of modelled expulsion events.

Strengths

• Analysis is grounded in data from 31 specific wells and 25 depocentre sites.
• Models incorporate multiple new data types, including detailed benthic foraminiferal data and new kerogen kinetics.
• Findings are linked to specific geological formations (Plover, Lower Vulcan, Echuca Shoals) and structures (Heywood Graben).

Limitations

• Core dataset metadata (columns, row count, file size) is unavailable across all platform entries.
• The primary data format appears to be a published external document (HTML/PDF), limiting direct computational analysis.
• Key details such as author, specific license, and original publication date are not provided.

Provenance

Source

Geoscience Australia

Collection Method

Subsidence and thermal history modelling incorporating seismic, foraminiferal, and geochemical data.

Time Range

Jurassic to Late Tertiary geological periods.

Freshness

Last platform update recorded as 2026-04-20, but the underlying study publication date is unknown.

Geography

Browse Basin, offshore Western Australia, including Heywood Graben and Seringapatam Sub-basin.