WA-8-L Production Equipment Abandonment

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Activity name
WA-8-L Production Equipment Abandonment
Activity types
Any other petroleum-related activity
Submitted by
Santos Limited
Submission date
14/12/2018
Submission type
New
Status
Accepted
Decision date
23/01/2019
Related documents
EP Summary (pdf 3 MB)

Location map (click to enlarge)
A647979
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 14/12/2018 NOPSEMA decision 14/01/2019 Not applicable
Request for further information 10/01/2019 Titleholder action 31/01/2019 Not applicable
Submission of further information 14/01/2019 NOPSEMA decision 28/01/2019 Not applicable
Acceptance of EP 23/01/2019 Titleholder action 04/02/2019 Decision notification (pdf 172 KB)
Activity stopped 30/01/2019 Not applicable Not applicable
Submission of EP summary 01/02/2019 NOPSEMA decision 11/02/2019 Not applicable
Publication of EP summary 04/02/2019 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

Santos Limited (Santos) is the Operator of Production Licence WA-8-L. This Environment Plan (EP) relates to abandonment of production equipment that is currently in situ on the seabed in WA-8-L, where it has been since the decommissioning of the Talisman production facility in 1992.

 Following the termination of production operations in July 1992, the two Talisman production wells (T-1 and T-7) were plugged and abandoned, and the wellheads were recovered. During the decommissioning all locatable items were recovered from the Talisman field, with the exception of the T-7 flowline and control umbilical line, an anchor and length of chain, and a tyre weight. These remaining items of production equipment have remained on the seabed to date.

 The petroleum activity to be undertaken for WA-8-L involves no operations and comprises of leaving the production equipment in situ in perpetuity. This activity will involve no operations within WA‑8‑L.

 Production Licence WA-8-L is located 127 km north of Dampier, WA in the northern Carnarvon Basin, and covers two graticular blocks, containing the Talisman and Amulet fields. The production licence area covers 161 km2 across a water depth range of 79-89 metres (m). WA-8-L is surrounded by adjacent exploration permit areas WA-191-P, WA-352-P and WA-1-P. The locations of the wells and production licence area are provided in the attached map. Geographical coordinates for the assumed position of the production equipment, based on the known locations for the T-7 wellhead and Talisman CALM Buoy / FPSO, are provided below. 

  • T-7 Wellhead – 19° 29’ 47.066” S; 116° 55’ 53.516” E
  • Flowline and umbilical (start point) – 19° 29’ 47.066” S; 116° 55’ 53.516” E
  • Flowline and umbilical (end point) – 19° 29’ 52.85” S; 116° 55’ 25.940” E

 The production equipment is located in water depths of 79 to 84 m.

 

Regions
North West, Pilbara
Commonwealth waters adjacent to
Western Australia
Titles (or other instruments)
WA-8-L Opens in new window
Contact

Mr Nick Fox

Head of Environment and Access

Santos Limited

60 Flinders Street

ADELAIDE SA 5000

Telephone: +61 8 8116 5151

Email: Nick.Fox@santos.com

Reference
4707

*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.