COMMONWEALTH OF AUSTRALIA
Sections 226 and 708
Offshore Petroleum and Greenhouse Gas Storage Act 2006
VARIATION OF PIPELINE LICENCE WA-24-PL
(GWF-1)
I, GRAEME ALBERT WATERS, the National Offshore Petroleum Titles Administrator, on behalf of the Commonwealth–Western Australia Offshore Petroleum Joint Authority hereby vary Pipeline Licence WA-24-PL (the Licence), for which:
Woodside Energy Ltd.
(ACN 005 482 986)
BP Developments Australia Pty. Ltd.
(ACN 081 102 856)
Chevron Australia Pty Ltd
(ACN 086 197 757)
BHP Petroleum (North West Shelf) Pty Ltd
(ACN 004 514 489)
Shell Australia Pty Ltd
(ACN 009 663 576)
Japan Australia LNG (MIMI) Pty. Ltd.
(ACN 006 303 180)
are the registered titleholders, as set out below.
The variation takes effect on the day on which this notice of variation is published in the Commonwealth 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
VARIATION OF
PIPELINE LICENCE WA-24-PL
ROUTE OF THE PIPELINE
- The text and table in Route of the Pipeline is deleted and replaced with the following:
The pipeline route for the system of pipes is described in the tables hereunder and displayed on the attached map, commencing at the TPA Manifold Tie-in (Tidepole) to the GWA SSIV Upstream Tie-in flange. Coordinates are based on Geodetic Datum of Australia (GDA94), UTM Zone 50.
No. | Feature Name | Easting (mE) | Northing (mN) |
1 | TPA Manifold | 383,721.56 | 7,814,441.65 |
2 | TPA Tie-In (F6) | 383,660.13 | 7,814,473.88 |
3 | Clamp B Pile – West – 0100-4 | 383,468.20 | 7,815,178.60 |
4 | Clamp B Pile – East – 0100-1 | 383,497.80 | 7,815,186.00 |
5 | Clamp B Datum – KP 0.0750 | 383,476.26 | 7,815,207.41 |
6 | GSA Tie-In 1 (F8) | 382,910.89 | 7,817,444.55 |
7 | GSA Tie-In Skid | 382,950.43 | 7,817,503.11 |
8 | GSA Tie-In 2 (F19) | 382,888.53 | 7,817,532.30 |
9 | Clamp A Pile – West – 0100-2 | 382,694.50 | 7,818,234.90 |
10 | Clamp A Pile – East – 0100-3 | 382,724.70 | 7,818,242.00 |
11 | Clamp A Datum – KP 3.904 | 382,703.16 | 7,818,262.72 |
12 | GDA Tie-In 1 (F22) | 382,137.15 | 7,820,505.50 |
13 | GDA Manifold | 382,176.20 | 7,820,564.15 |
14 | GDA Tie-In 2 (F33) | 382,136.92 | 7,820,645.66 |
15 | Buckle Initiator 1 (BI-1) | 383,236.28 | 7,821,861.60 |
16 | Buckle Initiator 2 (BI-2) | 384,108.17 | 7,823,261.26 |
17 | Buckle Initiator 3 (BI-3) | 385,207.10 | 7,824,483.37 |
18 | Buckle Initiator 4 (BI-4) | 386,501.43 | 7,825,498.49 |
19 | GWA Tie-In Spool Flange (F36) | 387,599.75 | 7,826,720.96 |
20 | GWA SSIV Structure | 387,678.51 | 7,826,702.11 |
21 | GWA Platform | 387,795.24 | 7,826,652.51 |
Tie-in to GDA01 | ||
Feature Name | Easting (mE) | Northing (mN) |
GDA01 Xmas tree | 382 155.03 | 7 820 578.47 |
Tie-in GDA Manifold | 382 176.20 | 7 820 564.15 |
Tie-in to GDA02 | ||
Feature Name | Easting (mE) | Northing (mN) |
GDA02 Xmas tree | 382 190.59 | 7 820 585.40 |
Tie-in GDA Manifold | 382 176.20 | 7 820 564.15 |
GDA03 XT Flowline | |||
Feature Name | Easting (mE) | Northing (mN) | Bend Radius (m) |
GDA03 Xmas Tree | 381200 | 7819325 |
|
TP9 | 381207 | 7819333 |
|
IP6 | 381212 | 7819339 | 22 |
TP10 | 381212 | 7819347 |
|
IP7 | 381211 | 7819364 | 22 |
TP11 | 381228 | 7819368 |
|
IP8 | 381236 | 7819370 | 22 |
TP12 | 381241 | 7819377 |
|
TP13 | 382066 | 7820513 |
|
IP9 | 382068 | 7820517 | 22 |
TP14 | 382073 | 7820519 |
|
TP15 | 382112 | 7820542 |
|
IP10 | 382118 | 7820546 | 50 |
TP16 | 382125 | 7820547 |
|
GDA Manifold | 382176 | 7820564 |
|
GDA04 XT Flowline | |||
Feature Name | Easting (mE) | Northing (mN) | Bend Radius (m) |
GDA04 Xmas Tree | 383394 | 7820237 |
|
TP17 | 383384 | 7820241 |
|
IP11 | 383377 | 7820243 | 22 |
TP18 | 383373 | 7820250 |
|
IP12 | 383363 | 7820264 | 22 |
TP19 | 383346 | 7820258 |
|
IP13 | 383339 | 7820255 | 22 |
TP20 | 383331 | 7820257 |
|
TP21 | 382323 | 7820581 |
|
IP14 | 382313 | 7820585 | 50 |
TP22 | 382302 | 7820583 |
|
TP23 | 382218 | 7820573 |
|
IP15 | 382213 | 7820572 | 22 |
TP24 | 382209 | 7820570 |
|
IP16 | 382206 | 7820567 | 22 |
TP25 | 382202 | 7820567 |
|
GDA Manifold | 382176 | 7820564 |
|
GDA05 XT Flowline | |||
Feature Name | Easting (mE) | Northing (mN) | Bend Radius (m) |
GDA05 Xmas Tree | 379800 | 7818975 |
|
TP1 | 379809 | 7818980 |
|
IP1 | 379816 | 7818984 | 22 |
TP2 | 379824 | 7818984 |
|
IP2 | 379841 | 7818982 | 22 |
TP3 | 379846 | 7818999 |
|
IP3 | 379848 | 7819006 | 22 |
TP4 | 379855 | 7819011 |
|
TP5 | 381969 | 7820450 |
|
IP4 | 381971 | 7820452 | 50 |
TP6 | 381973 | 7820453 |
|
TP7 | 382069 | 7820532 |
|
IP5 | 382078 | 7820539 | 50 |
TP8 | 382089 | 7820541 |
|
GDA Manifold | 382176 | 7820564 |
|
2. The Greater Western Flank Phase 1 (GWF-1) Pipeline Route Map is replaced with the map at Attachment 1.
SPECIFICATIONS:
3. The Schedule of Specifications is varied by deleting the current text and replacing it with the following:
Design and Construction
The offshore pipeline must be designed and constructed in accordance with Offshore Standard DNV-OS-F101 – Submarine Pipeline Systems (Offshore Pipeline), which is incorporated in its entirety in Australian Standard AS2885.4 – Pipelines, Gas and Liquid Petroleum (Part 4: Submarine Pipelines). Specifically, the design and construction phase of the pipeline must comply with DNV-OS-F101.
The flexible flowlines will be designed and constructed in accordance with the following design standards:
Standard | Title |
API 17B | Recommended Practice for Flexible Pipe |
API 17J | Specification for Unbonded Flexible Pipe |
API 17L1 | Specification for Unbonded Flexible Pipe Ancillary Equipment |
API 17L2 | Recommended Practice for Flexible Pipe Ancillary Equipment |
Basis of Design
The pipeline shall be designed on the following parameters: -
- Have a nominal outside diameter of 16” with a minimum wall thickness of 21.0mm between the following pipeline sections: TPA Manifold Tie-In and GSA Tie-In Skid, GSA Tie-In Skid and GDA Manifold, GDA Manifold and GWA SSIV Upstream Tie-in at the Goodwyn Alpha Platform.
- design temperatures as set out in the table below:
GDA/TPA Manifolds and GSA Tie-In Skid | -29 deg C |
Tie-In Spool Pieces | -20 deg C |
Pipeline Transitions: (Min. length of 150m from tie-in spool downstream of TPA, GSA manifold headers and the GDS tie-in skid) | -10 deg C |
Remainder of pipeline | -5 deg C |
- Design Pressure: 30.0 MPa (Max Hydro-test pressure 32.11 MPa)
- Maximum Allowable Operating Pressure (MAOP)
- 29.7 MPa referenced to -113.7m LAT (Lowest Astronomical Tide) i.e. the TPA manifold elevation.
- a design life of 25 years
- a total pipeline length of 14.4km.
The flowlines shall be designed on the following parameters:
Internal diameter | 8” | |
Temperature | Maximum design | 115 deg C |
Maximum operating | 109 deg C | |
Minimum design temperature | -30 deg C | |
Pressure | Maximum design | 34.6 MPa(a) |
Maximum operating | 17.8 MPa(a) | |
Minimum design | 0 MPa(a) | |
Design life | 20 years | |
Flowline lengths | GDA03: 1.6km GDA04: 1.2km GDA05: 2.9km | |
Pipeline Material
The pipeline will be manufactured from 316L Stainless Steel to conforming to ASTM A240 316L with an external layer of carbon steel to DNV 415 CS (minimum yield strength 415 MPa).
The flowlines will be unbonded flexible pipes with the inner carcass made of AISI 316L stainless steel.
External Corrosion Protection
The pipeline and flowlines are to be protected from external corrosion by a combination of anti-corrosion coating and a sacrificial anode cathodic protection system.
Note: text in italics in relation to items 1, 2, and 3 reflects changes to the licence given effect by this variation.
Attachment 1