Light Hydrocarbon Geochemistry of the WA-28-P Area, Dampier Sub-basin, Western Australia :

531 kilometers of Direct Hydrocarbon Detection (DHD) seismic data were collected over a 7-day period in October 1990 across the WA-28-P exploration permit in Western Australia's Dampier Sub-Basin. The Marine Geoscience and Petroleum Geology Group of the Australian Bureau of Mineral Resources acquired this data in cooperation with Woodside Petroleum to evaluate the DHD method. No significant hydrocarbon anomalies were detected, indicating well-sealed reservoirs, though minor total hydrocarbon increases were observed at specific well locations.

Use Cases

• Evaluating the effectiveness of Direct Hydrocarbon Detection (DHD) methods based on the survey results over known oil and gas accumulations.
• Analyzing reservoir seal integrity in the Dampier Sub-Basin based on the described lack of significant hydrocarbon anomalies.
• Studying background and anomalous total hydrocarbon (THC) levels, such as the increase from 16ppm to 22.8ppm over the Montague 1 well.
• Mapping geochemical survey lines for spatial analysis, based on the 25 lines covering 531 km between the Angel gas field and Madeleine 1 well.

Strengths

• Data acquisition details are precisely documented, including the 7-day period (October 22-28, 1990) and the 531 km of survey lines.
• The description provides specific, quantified geochemical observations, such as the THC increase at Montague 1 from 16ppm to 22.8ppm.
• Survey context is clearly defined, covering a specific exploration permit (WA-28-P) and traversing known accumulations like Wanaea, Cossack, and Angel.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for quantitative modeling.
• Data may reflect geographic and temporal bias inherent to the single, localized survey in 1990.

Provenance

Source

Marine Geoscience and Petroleum Geology Group, Australian Bureau of Mineral Resources, via the Australian Ocean Data Network.

Collection Method

Cooperative high-resolution seismic reflection program with Woodside Petroleum Pty Ltd, using Direct Hydrocarbon Detection (DHD) methods.

Time Range

Data acquired October 22-28, 1990.

Freshness

Last updated 2026-06-04 07:32:28.158654; freshness should be verified.

Geography

Dampier Sub-Basin, North-West shelf, Western Australia, specifically exploration permit WA-28-P between the Angel gas field and Madeleine 1 well.