Gippsland Basin Geophysical and Geotechnical Investigations

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Activity name
Gippsland Basin Geophysical and Geotechnical Investigations
Activity types
Other survey
Submitted by
Esso Australia Resources Pty Ltd
Submission date
21/12/2018
Submission type
Revision (Change of Circumstances or Operations)
Status
Titleholder to provide more information
Related documents
 
Link to previously accepted EP
Gippsland Basin Geophysical and Geotechnical Investigations

Location map (click to enlarge)
A649170
Progress bar
Submission
Assessment with titleholder
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 21/12/2018 NOPSEMA decision 21/01/2019 Not applicable
Request for further information 03/01/2019 Titleholder action 24/01/2019 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

Esso proposes to undertake a series of geophysical and geotechnical surveys within eight existing production licence areas in the Gippsland Basin of eastern Bass Strait. The survey program is required to inform a number of prospective future developments in the Gippsland basin. These include:

  • Development of the West Barracouta (BTW) gas field (VIC/L1) which is part of the existing Barracouta gas field and located approximately 6 km southwest of the existing Barracouta platform (in VIC/L2)
  • Potential plug and abandonment activities at a number of existing wells located in VIC/L1, VIC/L2, VIC/L3, VIC/L5, VIC/L18 and VIC/RL1
  • Potential drilling activities inside VIC/L9
  • Future developments around the existing Kipper facilities (VIC/L25).

The survey program is planned to commence initially in the first quarter of 2018 at the BTW location and will continue intermittently over a maximum six month period. Survey activities are likely to occur over a 2 to 15 day period at each of the locations within each of the licence areas. Water depths within the licence areas vary from 36 to 89 m.

Geophysical methods proposed are based on conventional techniques and include:

  • Single beam echo sounder (SBES).
  • Multi beam echo sounder (MBES).
  • Side scan sonar (SSS).
  • Sub bottom profiler (SBP) including Ultra high resolution (UHR).
  • Magnetometer.

Geotechnical sampling potentially includes:

  • Rotary core sampling to 80m below the seabed.
  • In situ penetration testing to 80m below the seabed.
  • Piston coring or vibracoring between 3 to 6m below the seabed.

The proposed survey program will be completed in two stages using two different vessels. Stage 1 involves the geophysical survey, commencing at BTW and then progressing to the additional licence areas. Stage 2 involves the geotechnical survey also commencing at BTW and then also progressing to the additional licence areas.

Regions
Gippsland
Commonwealth waters adjacent to
Victoria
Titles (or other instruments)
VIC/L3 Opens in new window , VIC/L5 Opens in new window , VIC/L1 Opens in new window , VIC/L2 Opens in new window , VIC/L18 Opens in new window , VIC/L9 Opens in new window , VIC/L25, VIC/RL1 Opens in new window
Contact

Ms Carolyn Thomas

Risk, Environment and Regulatory Supervisor

Esso Australia Pty Ltd for and on behalf of Esso Australia Resources Pty Ltd

Level 9, 664 Collins Street, Docklands

MELBOURNE VIC 3008

Telephone: +61 3 9261 0260

Email: carolyn.y.thomas@exxonmobil.com

Reference
4716

*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.