Hydrocarbon Gas Geochemistry in Offshore Otway and Gippsland Basin Sediments, 1988

Offshore Otway and Gippsland Basins in Australia were surveyed for light hydrocarbon gases in April/May 1988. The Australian Ocean Data Network hosts this preliminary report, which details measurements from 342 sediment locations. Thermogenic hydrocarbons were identified at 42 locations, with analysis of wet gas content and concentration patterns.

Use Cases

• Identify potential hydrocarbon source rock locations based on thermogenic gas evidence in near-surface sediments.
• Model hydrocarbon source type and maturity based on wet gas content ([C2-C4/C1-C4] x 100) patterns.
• Analyze the relationship between gas concentration and geological structures like faulting in the Voluta Trough.
• Integrate geochemical data with thermal maturation modeling to characterize liquid versus gas-prone source rocks.

Strengths

• Data from 342 specific sampling locations provides a substantial spatial survey.
• Clear identification of 42 locations with thermogenic hydrocarbons, broken down by sub-basin (32 Otway, 10 Gippsland).
• Analysis integrates geochemical data with thermal maturation modeling and well data.

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 preliminary 1988 report; freshness should be verified for contemporary applications.

Provenance

Source

Australian Ocean Data Network

Collection Method

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

Time Range

April/May 1988

Freshness

Last updated 2026-04-10 19:07:04.857781; freshness should be verified

Geography

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