Sole Pipeline and Subsea Infrastructure Installation

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Activity name
Sole Pipeline and Subsea Infrastructure Installation
Activity types
Construction and installation of a facility, Construction and installation of a pipeline
Submitted by
Cooper Energy (Sole) Pty Ltd
Submission date
25/05/2018
Submission type
New
Status
Accepted
Decision date
26/07/2018
Related documents
EP Summary (pdf 2.4 MB)

Location map (click to enlarge)
A611976
Progress bar
Submission
Assessment
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 25/05/2018 NOPSEMA decision 26/06/2018 Not applicable
Unable to make a decision within 30 days – request for further information 20/06/2018 Titleholder action 11/07/2018 Not applicable
Submission of further information 10/07/2018 NOPSEMA decision 31/07/2018 Not applicable
Acceptance of EP 26/07/2018 Titleholder action 05/08/2018 Decision notification (pdf 712 KB)
Submission of EP summary 01/08/2018 NOPSEMA decision 13/08/2018 Not applicable
Publication of EP summary 14/08/2018 Not applicable Not applicable
Activity started 10/09/2018 Not applicable 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

Cooper Energy (Sole) Pty Ltd (Cooper) is the Titleholder for Production Licence VIC/L32 (Sole) which is approximately 65 km from Orbost Gas Plant off Victoria’s coast in Bass Strait. Cooper Energy is currently drilling of two wells – Sole-3 and Sole-4 as part of on-going field development operations within the Sole field.
Activities included in the scope of the Environment Plan (EP) include the installation of a production pipeline, umbilical and associated subsea infrastructure that will connect the Sole wells with the Orbost Gas Plant on shore
The Sole production pipeline is 300 mm (12 inch) in diameter carbon steel grade DNV 450. At the end of the pipeline a PLEM will be welded to the pipeline system to provide temporary pigging facilities for the production pipeline, as well as acting as a means to join the Sole 3 and Sole 4 wells to the system via tie-in spool(s). The production pipeline will be approximately 64 km in total. Other subsea infrastructure includes a subsea control module which will be supported by a mudmat foundation, and tie-in spools and flying leads.
Upon completion of installation activities for the production pipeline, they will be flooded, gauged, cleaned, and hydrotested to verify pipeline integrity.
All activities will be undertaken by a purpose built pipelay vessel and serviced by support vessels and helicopters as required. Non-invasive site surveys comprising of visual ROV, multibeam echo sounder (MBES) or side scan sonar (SSS) may be required.
Activities covered under this Plan are anticipated to commence in the second half of 2018 and take approximately 6 months, excluding weather and operational delays. During this period any of the activities described in this Plan may be undertaken, with normal operations conducted 24-hours a day.
Following de-watering of the pipeline, the subsea infrastructure will be suspended until operations commence (triggered by hydrocarbons flowing from the reservoir). This EP will remain in force throughout the suspension phase.

Regions
Gippsland
Commonwealth waters adjacent to
Victoria
Titles (or other instruments)
VIC/L32 Opens in new window , VIC/PL43 Opens in new window
Contact

Iain MacDougall
General Manager Operations
Cooper Energy Limited
Level 8, 70 Franklin Street,
Adelaide, SA 5000
Phone: (08) 8100 4900
Email: iainm@cooperenergy.com

Reference
4519

*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.