Dorrigo 3D Marine Seismic Survey

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Activity name
Dorrigo 3D Marine Seismic Survey
Activity types
Seismic survey
Submitted by
3D Oil T49P Pty Ltd
Submission date
30/01/2019
Submission type
New
Status
Under assessment
Related documents
 

Location map (click to enlarge)
A653600
Progress bar
Submission
Assessment with NOPSEMA
Final decision
EP summary published
Activity started
Activity stopped
End of operation of EP
Activity events
Event Event date Next event* Next event due* Related documents
Submission of new EP 30/01/2019 NOPSEMA decision 01/03/2019 Not applicable
Request for further information 28/02/2019 Titleholder action 14/04/2019 Not applicable
Submission of further information 11/04/2019 NOPSEMA decision 13/05/2019 Not applicable

* The next event is based on NOPSEMA’s understanding and expectation of what may occur next in the assessment process. There are a number of other events that may occur, and events may happen sooner or later than expected. All events will be published in this table as and when they take place.

Activity 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.

Regions
Otway, Tasmania
Commonwealth waters adjacent to
Tasmania
Titles (or other instruments)
T/49P Opens in new window
Contact

Mr David Briguglio

Exploration Manager

3D Oil T49P Pty Ltd

Level 18, 41 Exhibition Street

MELBOURNE  VIC  3000

Telephone: +61 3 9650 9866

Email: dbriguglio@3doil.com.au

Reference
4753

*Where an environment plan was submitted or accepted prior to 28 February 2014 certain information is not published, in accordance with the Environment Regulations in place at that time. For accepted EPs, refer to the attached EP Summary for additional information.