Hydrocarbon Gas Geochemistry in Otway and Gippsland Basin Sediments, 1988

Light hydrocarbon gas measurements from 342 sediment locations on the continental shelf and slope of the Otway and Gippsland Basins, collected during a 21-day research cruise in April/May 1988. The data, published by Geoscience Australia, identifies thermogenic hydrocarbons at 42 locations and includes analyses of gas wetness and concentration. Results provide evidence for the location and maturity of hydrocarbon source rocks in the region.

Use Cases

• Identify potential hydrocarbon seepage zones based on the 42 locations with thermogenic gas evidence.
• Model source rock maturity based on wet gas content ([C2-C4/C1-C4] x 100) patterns described across basin margins and troughs.
• Correlate near-surface gas anomalies with subsurface faulting, as suggested by higher gas concentrations in the Voluta Trough.
• Integrate geochemical data with thermal maturation models to characterize liquid versus gas-prone source rocks, as referenced for the Otway and Sherbrook Groups.

Strengths

• Data covers 342 specific sampling locations, providing spatial density for analysis.
• Findings are integrated with thermal maturation modeling and well data, suggesting interpretive depth.
• The report distinguishes results between two major basins (Otway and Gippsland) and sub-regions like the Crayfish Platform and Voluta Trough.

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 single cruise in 1988; temporal coverage is limited.

Provenance

Source

Geoscience Australia Data

Collection Method

Measured during a 21-day geochemical and sedimentological research program aboard the BMR vessel 'Rig Seismic'.

Time Range

April/May 1988

Freshness

Last updated 2026-03-25 19:21:37.450839; freshness should be verified.

Geography

Offshore Otway and Gippsland Basins, Australia (continental shelf and upper slope)