Origin of Gilmore Gas and Oil with Isotopic and Geochemical Analysis

Dry gas in the Gilmore Field is sourced from both wet gas associated with oil generation and a deep, overmature methane source with high nitrogen content. The maturity level of the wet gas and oil is equivalent to a vitrinite reflectance of 1.4-1.6 percent, and the oil is sourced from Devonian marine organic matter. This dataset, published in The APPEA Journal in 1998, likely contains geochemical and isotopic data supporting these findings.

Use Cases

• Identify overmature gas sources based on molecular and multi-element isotopic data mentioned in the description
• Model petroleum generation and expulsion events based on described maturity levels and source rock concepts
• Correlate Devonian-sourced oils across different basins using source-sensitive biomarkers and carbon isotope composition
• Assess reservoir compartmentalization and migration pathways based on gas composition variations described

Strengths

• Specific maturity range provided (vitrinite reflectance of 1.4-1.6 percent)
• Identifies specific source rock formations (Log Creek Formation, Lissoy Sandstone, Cooladdi Dolomite)
• Uses a combination of molecular and multi-element isotopic approaches as described

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data is based on a 1998 study; freshness should be verified

Provenance

Source

Australian Ocean Data Network, citing Boreham C.J., & de Boer R.A. 1998. Origin of Gilmore gas and oil, Adavale Basin, central Queensland. The APPEA Journal 38 (1), 399–420.

Collection Method

Likely contains geochemical and isotopic analysis results from the described study.

Time Range

Study published in 1998.

Freshness

Last updated 2026-04-10 19:09:43.338023; freshness should be verified

Geography

Gilmore Field, Adavale Basin, central Queensland, Australia.