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Regia 3D Marine Seismic Survey Information

Viridien (Australia) Pty Ltd (ABN 70 081 777 755) is preparing an environment plan for its Regia 3D Marine Seismic Survey (MSS), located in the Otway Basin. The purpose of the Regia 3D MSS is to collect high-quality geophysical data about rock formations and structures beneath the seabed and assess potential for new oil and gas discoveries.

The Regia 3D MSS is a typical 3D survey using methods and procedures like others conducted in Australian waters. No unique or unusual equipment or operations are proposed. The active source area comprises the area within which 3D seismic acquisition will be undertaken and has a maximum sail line distance of 1,700 km. The active source area is surrounded by a larger operational area (approximately 4,000 km2), for the purpose of line turns, run-ins, run-outs, seismic testing and support activities. The operational area at its closest is approximately 12 km south of Port Fairy. The seismic survey will be undertaken in water depths no shallower than 50 m and no deeper than 200 m.

The survey will involve a single seismic survey vessel towing a seismic source array with a total volume of 2,820 cubic inches, at a water depth of between 5 and 10 m. The seismic source will use compressed air to emit regular pulses of sound that reflect off the seabed and underlying rock formations. The reflected sound wave will be received by up to 14 hydrophone streamers. Each streamer will be up to 8,100 m in length, spaced approximately 100 m apart, and towed at a depth of approximately 25 m. During the survey, the seismic survey vessel will travel at a speed of approximately 4.5 knots, discharging the seismic source approximately every 12.5 m. The survey vessel will typically acquire seismic data along a series of adjacent and parallel lines in a “racetrack” pattern. When the vessel completes the line, it will turn again to follow another line offset approximately 500 m from the first. This pattern is repeated until the required coverage is completed.

The Regia 3D MSS will take a maximum of 90 days to acquire, and may be undertaken in any month except January, February and March. The precise timing of the survey is subject to vessel availability, weather conditions and other operational considerations, and will consider the seasonality of environmental sensitivities, where practicable.

Further information about the activity, the environmental assessment process and the consultation process can be found at

There is also a video guide on how to navigate the environment plan.

Viridien wishes to consult with relevant stakeholders to identify any functions, interests or activities that may be affected by the proposed operations. The environmental consultant Klarite is engaging with stakeholders (local communities, traditional owners, fisheries representatives, conservation associations, regulatory bodies, etc.) and addressing their potential concerns.

This page provides detailed information about the Regia 3D MSS:

1. Who is Viriden Australia? 
2. What is ‘multi-client data’? 
3. What kind of activities are planned to be conducted during the Regia 3D Marine Seismic Survey? 
4. Why is new data needed in this area? 
5. How are seismic surveys authorized? 
6. Do Viridien activities impact the environment? 
7. Is there a potential impact on fish? 
8. Will this survey mean all fishing in the area will have to be stopped during acquisition? 
9. What kind of consultation process has there been with the local stakeholders?