Philippine Offshore Seismic And Geochemical Survey Data

March to May 1992 saw a joint marine survey by the Australian Bureau of Mineral Resources and the Philippine Office of Energy Affairs. The project collected 2750 km of 192-channel seismic data, plus geochemical sniffer, gravity, magnetic, and bathymetric data across four Philippine offshore basins. Data processing and integration with existing industry information was planned to assess petroleum potential.

Use Cases

• Map subsurface structures and depocentres using processed 192-channel seismic reflection data.
• Identify hydrocarbon seepage anomalies by analyzing geochemical sniffer data for methane, ethane, and propane concentrations.
• Correlate geochemical anomaly types (dry vs. wet thermogenic gas) with fault lines and diapir structures from seismic interpretation.
• Model basin geometry by integrating seismic stratigraphy with concurrent gravity, magnetic, and bathymetric data.
• Assess hydrocarbon flux rates using vertical geochemical profiles and isotope analysis from gas samples collected in Ragay Gulf.

Strengths

• 2750 km of 192-channel seismic data provides substantial spatial coverage.
• Multi-modal data collection includes seismic, sniffer, gravity, magnetic, and bathymetric measurements.
• Survey conducted during calm weather conditions conducive to low-noise data acquisition.

Limitations

• Seismic data acquisition was halted at night in some areas due to fishing activity, creating spatial gaps.
• Primary data formats are PDF and HTML reports, not raw, machine-readable data files.
• Dataset scope is limited to a single two-month survey in 1992, offering a historical snapshot.

Provenance

Source

Australian Ocean Data Network, originating from the Australian Bureau of Mineral Resources and Philippine Office of Energy Affairs.

Collection Method

Joint marine survey using the research vessel Rig Seismic, deploying seismic reflection and geochemical sniffer equipment.

Time Range

March to May 1992

Freshness

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Geography

Four Philippine offshore sedimentary basins: NE Palawan Shelf, Cuyo Platform, Tayabas Bay, and Ragay Gulf.