Direct Hydrocarbon Detection Survey: Dampier Sub-Basin, 1990

Geoscience Australia's Marine Geoscience and Petroleum Geology Group collected 531 km of Direct Hydrocarbon Detection (DHD) data across 25 seismic lines in October 1990. The survey, conducted in co-operation with Woodside Petroleum in permit WA-28-P, traversed known oil and gas accumulations like Wanaea, Cossack, and Angel. No significant hydrocarbon anomalies were detected, indicating well-sealed reservoirs, though minor total hydrocarbon increases were observed at some well locations.

Use Cases

• Evaluating the effectiveness of Direct Hydrocarbon Detection (DHD) methods for surface geochemistry.
• Assessing reservoir seal integrity based on the absence of hydrocarbon anomalies over known fields.
• Analyzing background vs. anomalous total hydrocarbon (THC) concentrations, such as the increase from 16ppm to 22.8ppm at Montague 1.
• Studying hydrocarbon migration pathways in the Dampier Sub-Basin of Australia's North-West Shelf.

Strengths

• Contains a specific, high-resolution spatial survey covering 531 km across 25 lines.
• Provides a direct, factual case study on the lack of DHD anomalies over known hydrocarbon accumulations.
• Includes precise concentration measurements, such as the 16ppm background THC level.

Limitations

• Key metadata is missing: column names, row count, file size, and license information are not provided.
• Data is from a single, focused survey in 1990, limiting temporal and geographical scope.
• Platform records show conflicting 'last updated' dates (2026-05-14 and 2026-04-20), indicating potential metadata inconsistency.

Provenance

Source

Marine Geoscience and Petroleum Geology Group, Australian Bureau Of Mineral Resources (Geoscience Australia), in co-operation with Woodside Petroleum Pty Ltd.

Collection Method

Data acquired during a high-resolution seismic reflection program using Direct Hydrocarbon Detection (DHD) methods.

Time Range

October 22-28, 1990

Freshness

2026-05-14 03:11:59.853532

Geography

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