Oil and Gas News

Santos locks in approval for Bedout survey

The national regulator has cleared Santos to undertake a 3D seismic marine survey over a portion of exploration permit areas in the Bedout Sub-Basin offshore Western Australia.

The company outlined that the survey will take place in permits WA-437-P and WA-541-P and surrounding waters in the sub-basin in Commonwealth waters.

The data is required to develop regional geologic models to inform the exploration permit retention strategy, and the potential location of future drilling of exploration and development wells.

Seismic acquisition will be via methods and procedures similar to other seismic surveys conducted in Australian waters. 

Santos intends to acquire the full survey in 2021, with the timing of the survey is depends on vessel availability, weather conditions, feedback and approvals.

In order to avoid sensitive fish spawning and whale migration periods, acquisition of the survey will only be undertaken between February 1 to July 31 in either 2021 or 2022.

Outlined in its environment plan to the National Offshore Petroleum Safety and Environmental Management Authority, the survey will take at least 38 days to complete, with operations occurring on a 24‐hour basis.

The survey operational area is approximately 4752 km2, with water depths across the operational area ranging from 63m to 106m.

“The seismic survey vessel will travel along a series of pre-determined lines towing cables which contain microphones. As the survey vessel travels along the lines, sound waves will be directed down through the water and into the geology below the seabed,” Santos outlined in its EP.

“The sound that reflects back is measured by the microphones and is later processed to provide information about the structure and composition of geological formations below the seabed.”

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