Dry gas in Queensland's Gilmore Field originates from both wet gas associated with oil generation and a deep, overmature source with high nitrogen content. The study uses a molecular and multi-element isotopic approach to characterize these sources, identifying Devonian marine organic matter as the origin for the oil. This research, published in The APPEA Journal in 1998, suggests the deep gas source may be a more widespread play concept in Australian sedimentary basins.
Use Cases
- Modeling hydrocarbon generation and expulsion based on vitrinite reflectance values of 1.4-1.6%
- Identifying reservoir compartmentalization and migration pathways based on gas composition and isotopic signatures
- Correlating source rocks across basins using source-sensitive biomarkers and carbon isotope composition
- Assessing the potential for overmature, dry gas plays in other Australian sedimentary basins
Strengths
- Analysis is based on specific geochemical data including vitrinite reflectance (1.4-1.6%) and multi-element isotopic signatures
- Identifies specific source rock formations: Log Creek Formation, Lissoy Sandstone algal shales, and Cooladdi Dolomite
- Correlates findings with Devonian-sourced oils from other major Australian basins (Bonaparte and Canning)
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment
- Data is from a 1998 study; freshness should be verified
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Geochemical analysis of oil and gas samples, likely including molecular and isotopic techniques.
- Freshness
- Last updated 2026-06-16 22:02:13.900181; freshness should be verified
- Geography
- Gilmore Field, Adavale Basin, central Queensland, Australia