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Dorrigo 3D Marine Seismic Survey

Activity type Seismic survey
Activity subtypes
Submitted by 3D Oil T49P Pty Ltd
Submission date 30 January, 2019
Subtype New
Decision date 13 May, 2019
RMS ID 4753
Status Finalised
Outcome Accepted
Link to previously accepted EP

Mr David Briguglio
Exploration Manager
3D Oil T49P Pty Ltd
Level 18, 41 Exhibition Street
+61 3 9650 9866

Location map (click to enlarge)
Location map - Activity: Dorrigo 3D Marine Seismic Survey (refer to description)

3D Oil Limited propose to undertake the Dorrigo three-dimensional (3D) marine seismic survey (MSS) in the Commonwealth waters of the Otway Basin within Exploration Permit T/49P which lies adjacent to Tasmania. The Dorrigo MSS is located entirely within Commonwealth waters, approximately 18 km west of King Island (Tas) and 56 km south of Cape Otway (Vic). Water depths in the survey area are between 80 – 1420 m with seismic data acquisition undertaken in water depths between 100-840m.
The Dorrigo MSS operational area is 4350 km2. The full-fold acquisition area where seismic airguns will be operational covers an area of 1580 km2 within this larger area. Airguns will not operate outside the operational area. The operational area incorporates necessary space for vessel manoeuvring such as line run-ins, run-outs, line-turns, refuelling and resupply by support vessels. Two additional vessels are planned to support the Dorrigo MSS activities.
The proposed seismic source will have a total capacity of not more than 3260 cubic inches and will be towed at approximately 4.5 knots a short distance behind the seismic vessel at a depth of approximately 7 m. Ten solid hydrophone streamers measuring approximately 6000 m in length and spaced up to 125 m apart will be towed at a depth of 8-25 m below the surface behind the survey vessel. The seismic source will be discharged every 12.5 m along a series of parallel north-south lines spaced between 500-720 m apart.
The Dorrigo MSS is expected to take up to 35 days between 1 September and 31 October 2019.  This period avoids the Bonney upwelling period, the associated presence of marine megafauna in the survey area and other marine users.

Other Details
Locations Otway, Tasmania
Commonwealth waters adjacent to Tasmania
Titles (or other instruments) T/49P
Current Documents (Finalised)
Accepted Environment Plan

Key matters report

Location map