COMMONWEALTH OF AUSTRALIA
Sections 226 and 708
Offshore Petroleum and Greenhouse Gas Storage Act 2006
APPLICATION FOR VARIATION OF A PIPELINE LICENCE – WA-13-PL
I, GRAEME ALBERT WATERS, the National Offshore Petroleum Titles Administrator, on behalf of the Commonwealth–Western Australia Offshore Petroleum Joint Authority hereby give notice pursuant to sections 226 and 708 of the Offshore Petroleum and Greenhouse Gas Storage Act 2006 that an application has been received from
Woodside Energy Ltd.
(ACN 005 482 986)
BHP Petroleum (North West Shelf) Pty Ltd
(ACN 004 514 489)
BP Developments Australia Pty. Ltd.
(ACN 081 102 856)
Japan Australia LNG (MIMI) Pty. Ltd.
(ACN 006 303 180)
Shell Australia Pty Ltd
(ACN 009 663 576)
Chevron Australia Pty Ltd
(ACN 086 197 757)
for the variation of Pipeline Licence WA-13-PL in the offshore area of Western Australia, as set out below.
Pursuant to subsection 226(3) of the Act, a person may make a written submission to the Titles Administrator about this application within 30 days from the date of this notice.
This notice takes effect on the day on which it appears in the
Australian Government Gazette.
Made under the Offshore Petroleum and Greenhouse Gas Storage Act 2006
of the Commonwealth of Australia.
GRAEME ALBERT WATERS
TITLES ADMINISTRATOR
ON BEHALF OF THE COMMONWEALTH–WESTERN AUSTRALIA
OFFSHORE PETROLEUM JOINT AUTHORITY
APPLICATION FOR VARIATION OF
PIPELINE LICENCE WA-13-PL
The application seeks to effect the following amendments to the licence:
- The ROUTE OF PIPELINE is varied by:
a) deleting the words:
“The route of the pipeline shall be from the Pipeline End Manifold (PLEM) at or about latitude 19⁰ 31’ 27.67”(S), longitude 116⁰ 05’ 52.926”(E) westward to the Goodwyn A Platform at or about latitude 19⁰ 39’ 07.937”(S), longitude 115⁰ 55’ 47.028”(E) within the 500m wide corridor, shown in the licensee’s Drawing Drims# 2020280-v2, dated 18 August 2005, titled ‘Perseus over Goodwyn Project (PoG), Pipeline Route’, attached as annexure ‘A’ (All coordinates referenced to GDA94).”
b) and replacing with:
“The route of the pipeline is from the Pipeline End Manifold (PLEM) to the Goodwyn A Platform within the 100 m wide corridor, as shown in licensee’s Drawing CRN# A1960DU001.0001, last updated 17 April 2020, titled ‘Perseus over Goodwyn Subsea Field Layout’, attached as Attachment 1.
Feature | KP | Easting (m) | Northing (m) |
Pipeline End Manifold | 0 | 405 366 | 7 840 904 |
Production Pipeline (16”) Tie-in Flange | 0 | 405 346 | 7 840 848 |
POGP 10” In-Line Tee | 6.55 | 400 565 | 7 836 812 |
POGP 16” In-Line Tee | 10.039 | 399 554 | 7 833 471 |
Production Riser Base at Goodwyn Platform | 24.16 | 387 795 | 7 826 652 |
Coordinates are based on the GDA94 Geodetic datum, MGA Zone 50.”
2. The proposed variation to the licence creates a system of pipes which includes the flowlines and spools linking the PER01 and PER03 wells to the Perseus over Goodwyn pipeline.
PER01 Flowline Arrangement | ||
Feature Name | Easting (mE) | Northing (mN) |
PER01 Wellhead Centre | 398 778 | 7 837 338 |
POGP 10” In-Line Tee | 400 565 | 7 836 812 |
PER01 Flowline Tie-in Flange | 398 806 | 7 837 311 |
PER03 Flowline Arrangement | ||
Feature Name | Easting (mE) | Northing (mN) |
PER03 Wellhead Centre | 399 588 | 7 833 444 |
POGP 16” In-Line Tee | 399 554 | 7 833 471 |
SCHEDULE – SPECIFICATIONS
3. The Schedule under Specifications, the Basis of Design table is varied by updating the items in bold and italics:
Item | Item Description | Details |
1 | From | Perseus PLEM |
2 | To | Goodwyn A Platform |
3 | Outside diameter of pipe and riser | 406.4mm |
4 | Wall thickness of pipe inclusive of riser (only for carbon steel) | 21mm + 3mm internal CRA |
5 | Length | 24.20 km |
6 | Internal Corrosion Allowance | Nil (CRA lined/clad or solid duplex) |
7 | External Corrosion Allowance | 3mm on riser above splash zone |
8 | Pipeline and Riser Steel Grade | Pipeline – DNV CS450 with CRA liner Riser and Spools – DNV CS450 with CRA Clad Bends and Flanges – Duplex Stainless Steel |
9 | Pipeline Specification | AS2885.4 / DNV-OS-F101 |
10 | Minimum yield strength of pipe steel | 450 MPa at 20⁰C |
11 | Pipeline Design Pressure | 8.9 MPag at seabed elevation at 128m (to LAT) |
12 | Max Allowable Operating Pressure | 8.9 MPag at seabed elevation at 128m (to LAT) |
13 | Normal Operating Pressure | 3.9 –8.9 MPag at seabed elevation at 128m (to LAT) |
14 | Proposed minimum field test pressure | 33.0 MPag Max |
15 | Normal Maximum Inlet Pressure | 8.9 MPag at seabed elevation at 128m (to LAT) |
16 | Normal Minimum Outlet Pressure | 3.9 MPag at seabed elevation at 128m (to LAT) |
17 | Minimum and Maximum Pipeline Design Temperature | Max 95⁰C, min -30⁰C |
18 | Maximum Riser and Spool Design Temperature | 67⁰C |
19 | Design capacity | Depends on well performance, nominally 540-650 MMscf/d |
20 | Stabilisation | By increased steel wall thickness |
21 | External coating specification | FBE adhesive/PP foam installation/PP shield (4 LPP) |
22 | Field weld joint coating | Compatible with 4LPP |
23 | Weight coating design and specification | Only for localised stability at pipeline ends. 120m at the PLEM end and 96m at the GWA end. 50mm thick. |
24 | Characteristics of substance to be conveyed | Hydrocarbons, gas/condensate fluid. Minimum formation water. |
25 | General plans and descriptions of pump stations, tank stations or valve stations and their equipment | Terminal station declaration proposed at Pipeline End Module (PLEM) |
26 | General plans and description of pigging facilities | Provision for temporary launching and receiving commissioning pigs will be located at the PLEM and downstream GWA RESDV |
27 | Design life | 33 years |
28 | The provisions for cathodic protection of the proposed pipeline | Pipeline bracelet anodes |
29 | Crossings | Nil |
30 | Marine Growth Allowance | Up to 145mm soft, 12mm hard |
31 | Location of offtake tees for future use | Upstream of Subsea Isolation Valve |
4. The WA-13-PL Pipeline Route Map at Annexure A is deleted and replaced with the map at Attachment 1.
Attachment 1