COMMONWEALTH OF AUSTRALIA
Section 708
Offshore Petroleum and Greenhouse Gas Storage Act 2006
APPLICATION FOR VARIATION OF A PIPELINE LICENCE
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 section 708 of the Offshore Petroleum and Greenhouse Gas Storage Act 2006 that an application has been received from
Quadrant Oil Australia Pty Limited
(ABN 63 050 611 688)
Quadrant East Spar Pty Limited
(ABN 82 008 674 413)
Quadrant Kersail Pty Ltd
(ABN 28 087 029 169)
Santos (BOL) Pty Ltd
(ABN 35 000 670 575)
for a variation of Pipeline Licence WA-5-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-5-PL
Pipeline Co-ordinates
The pipeline commences at the pipeline licence boundary of WA‐21‐PL and runs through the East Spar Manifold, a Z‐Spool, and a 14” Production Pipeline to the pipeline licence boundary of TPL‐12. Coordinates are based on Geodetic Datum of Australia (GDA94).
Feature ID | Feature Name | UTM Zone | Easting (mE) | Northing (mN) |
1 | Boundary of WA‐21‐PL and WA‐5‐PL | Zone 50 | 290,101.15 | 7,707,290.78 |
2 | East Spar Manifold Tie‐in Flange (Connection to Z‐Spool Flange) | Zone 50 | 290,117.00 | 7,707,292.00 |
3 | 14” East Spar Pipeline Flange (Connection to Z‐Spool Flange) | Zone 50 | 290,128.92 | 7,707,316.25 |
4 | Intersection Point (IP) 1 | Zone 50 | 312,897.64 | 7,710,670.05 |
5 | IP 2 | Zone 50 | 315,961.70 | 7,711,378.97 |
6 | IP 3 | Zone 50 | 320,430.55 | 7,712,179.87 |
7 | Boundary of WA‐5‐PL and TPL‐12 | Zone 50 | 330,042.88 | 7,714,306.54 |
Pipeline Design Parameters
The pipeline is based on the following parameters:
Item | Item Description | Details | ||||
a) | Outside diameter of pipeline (mm) Nominal wall thickness (mm)
Length of pipeline (in WA‐5‐PL) (km) | 355.6 (14” NB) 15.9 (offshore) / 17.5 (onshore ‐ note not applicable in this licence) 40.8 (KP0 – KP40.8) | ||||
b) | Pipe steel grade | API 5L X65 | ||||
c) | Pipe specification | ERW (offshore) / seamless (onshore) | ||||
d) | Joint type | Butt welded | ||||
e) | Minimum yield strength (MPa) | 448.32 | ||||
f) | Design pressure (MPa) | 20 | ||||
g) | Maximum Allowable Operating Pressure (MPa) | 20 | ||||
h) | Field test pressure (MPa) | 25 | ||||
i) | Fittings and valves specification | ANSI Class 1500 | ||||
j) | Water depth range (m) | 25 – 95 LAT | ||||
k) | Corrosion coating | External Field joints | 4.5 mm thick (nominal) asphalt enamel Bituminous tape wrap | |||
l) |
Weight coating | KP0‐KP23 KP23‐KP30 KP30‐KP63 | 30 mm thick reinforced concrete, 2400 S 90 mm thick reinforced concrete, 3040 S 30 mm thick reinforced concrete, 3040 S | |||
m) | Cathodic Protection | Sacrificial Aluminium Anodes | ||||
n) | Maximum inlet temperature (˚C) | 69 | ||||
o) | Minimum operating temperature (˚C) | 16 | ||||
p) | Substance to be conveyed: Maximum CO2 content (%Vol) Maximum Water content (mg/m3) Maximum hydrogen sulphide (mg/m3) Maximum sulphur (mg/m3) | Corrosion inhibited 3‐phase wellstream 2.0 Mole % 7,000 2 2 | ||||
q) |
Pipeline specific gravity | KP0‐KP23 KP23‐KP30 KP30‐KP63 | 1.6 2.3 1.8 | |||
r) | Maximum allowable free span (m) | 21.0m (Kp 16‐21) to 30.3m (Kp 21‐23) | ||||
s) | Design Capacity (Sm3/day at 15.6˚C & 1 atm) | 6.63×106 | ||||
t) | Erosional velocity (m/s) | 14.6 (Actual 4.2 m/s at 2.83x106) | ||||
u) | Design Environmental criteria. Marine growth allowance. | 50 year‐return cyclonic condition. 30mm hard growth, soft growth assumed removed in storm conditions. | ||||
v) | Stabilisation | Refer attached ES‐14‐DX‐00020 | ||||
w) | Thermal Offsets | 25m adjacent to the manifold | ||||
x) | Corrosion allowance (mm) | 4.9 (internal) Nil (external) | ||||
y) | General plans and descriptions of pump stations, tank stations or valve stations and their equipment | Subsea: Pipeline licence includes East Spar Manifold. All manifold piping and valves manufactured from corrosion resistant alloy (duplex) suitable for the produced fluids. | ||||
|
| Manifold piping sized to match the pipeline and designed in accordance with API 6A. Piping and valves are interconnected by means of flanges or hubs/clamps. Support structure designed in accordance with API RP 2A. Free standing and supported by mudmats.
Last‐Off Valve Replacement Spool (Replacing Valve LOV‐2010) 14” Linepipe (355.6 mm OD, 1276mm Length, 15.9 mm WT) Material: API‐5LX‐65 Test Pressure 38MPa
Onshore: Pipeline provided with pipeline isolation valve and emergency shutdown valves. | ||||
z) | East Spar Manifold / Pipeline Tie‐in Spool | 14” Line pipe (355.6 mm OD, 37.2m Length, 15.9 mm WT) Material: API‐5LX‐65 Test Pressure: 25MPa | ||||
aa) | Generals plans and description of pigging facilities | No permanent facilities installed.
Temporary subsea pig launch and onshore receipt facilities fabricated as required. | ||||