COMMONWEALTH OF AUSTRALIA

 

Sections 226 and 708

Offshore Petroleum and Greenhouse Gas Storage Act 2006

 

APPLICATION FOR VARIATION OF A PIPELINE LICENCE – NT/PL1

 

I, GRAEME ALBERT WATERS, the National Offshore Petroleum Titles Administrator, on behalf of the Commonwealth–Northern Territory 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

 

Santos NA Darwin Pipeline Pty Ltd

(ACN 093 316 959)

 

Santos Timor Sea Pipeline Pty Ltd

(ACN 003 111 573)

 

Inpex DLNGPL Pty Ltd

(ACN 104 124 192)

 

Eni Gas & Power LNG Australia B.V.

(ACN 104 468 617)

 

JERA Darwin LNG Pty Ltd

(ACN 104 226 673)

 

Tokyo Gas Darwin LNG Pty Ltd

(ACN 104 002 708)

 

SK E&S Australia Pty Ltd

(ACN 158 702 071)

 

 for the variation of Pipeline Licence NT/PL1 in the offshore area of Northern Territory, 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–NORTHERN TERRITORY

OFFSHORE PETROLEUM JOINT AUTHORITY

APPLICATION FOR VARIATION OF

PIPELINE LICENCE NT/PL1

 

The variation application seeks to give effect to the following amendments to the licence relating to the proposed future use of Pipeline Licence NT/PL1 (NT/PL1) associated with the tie-in of Pipeline Licence NT/PL5 (Barossa Gas Export Pipeline). The proposed Barossa tie-in would involve removal of an approximately 100 metres section of the Bayu Undan pipeline and the installation of additional infrastructure as referenced below. These activities would occur after current petroleum conveyance operations from the Bayu-Undan Field have ceased.

 

The variation also provides  basis of design details relevant to the current pipeline proposed to be included in ‘Specifications’ as outlined below.

 

ROUTE OF PIPELINE

 

  1. The Route of Pipeline is varied by deleting the current text and replacing with the following description and tables of coordinates:

 

“The route of the pipeline while still in use for conveyance of petroleum from the Bayu-Undan Field, commences from the boundary of the offshore areas of Western Australia and Northern Territory (being a point at about 266 404mE, 875 4578mN) and ending at the boundary of the offshore area of the Northern Territory with Northern Territory Coastal Waters (being a point at about 619 280mE, 8 659 685mN).

 

Following cessation of conveyance of petroleum from the Bayu-Undan Field, the portion of NT/PL1 proposed to be initially isolated and flooded shall be that section of pipeline which starts from a point at about 266 404mE, 8 754 578mN to a point at or about 598 711mE, 8 670 621mN.

 

The portion of NT/PL1 proposed to be reused for Barossa Tie-in shall be that section of pipeline which starts from a point at about 598 745mE, 8 670 574mN to a point at or about 619 280mE, 8 659 685mN.”

 

The route is further described in the tables of coordinates below and the map at Attachment A.”

 

Current Route of NT/PL1 pipeline

Feature name

KP

Easting

Northing

Radius (m)

Boundary of offshore areas of Western Australia and Northern Territory

34.2

266 403.5

8 754 577.5

N/A

Turning Point 6 Start

34.5

266 642.1

8 754 141.7

3000

Turning Point 6 End

34.5

266 696.8

8 754 100.6

Turning Point 7 Start

37.1

268 765.5

8 752 506.8

3000

Turning Point 7 End

38.7

270 196.8

8 751 910.0

Turning Point 8 Start

51.8

283 145.0

8 750 170.0

15000

Turning Point 8 End

52.8

284 138.0

8 750 002.4

Turning Point 9 Start

53.6

284 975.9

8 749 831.9

5000

Turning Point 9 End

54.6

285 907.6

8 749 732.0

Turning Point 10 Start

56.2

287 517.2

8 749 711.0

10000

Turning Point 10 End

57.4

288 718.8

8 749 622.7

Turning Point 11 Start

68.2

299 444.1

8 748 181.4

6000

Turning Point 11 End

69.2

300 451.4

8 748 131.6

Turning Point 12 Start

69.7

300 905.7

8 748 147.3

3000

Turning Point 12 End

70.7

301 901.6

8 748 013.5

Turning Point 13 Start

71.7

302 335.6

8 747 878.3

6000

Turning Point 13 End

72.1

303 320.3

8 747 660.5

Turning Point 14 Start

103.5

334 384.2

8 743 486.0

10000

Turning Point 14 End

105.1

335 977.3

8 743 137.7

Turning Point 15 Start

135.5

364 989.2

8 734 263.6

12000

Turning Point 15 End

137.1

366 567.8

8 733 895.3

Turning Point 16 Start

144.6

373 966.8

8 732 688.6

6000

Turning Point 16 End

146.2

375 570.7

8 732 644.4

Turning Point 17 Start

147.8

377 178.7

8 732 816.5

4000

Turning Point 17 End

150.0

379 271.2

8 732 475.2

Turning Point 18 Start

151.6

380 741.3

8 731 801.3

6000

Turning Point 18 End

153.2

382 276.1

8 731 333.6

Turning Point 19 Start

172.5

401 323.2

8 728 227.4

15000

Turning Point 19 End

175.3

404 068.4

8 727 507.7

Turning Point 20 Start

200.3

427 479.0

8 718 932.1

3000

Turning Point 20 End

200.6

427 821.2

8 718 829.4

Turning Point 21 Start

202.8

429 933.8

8 718 330.4

3000

Turning Point 21 End

203.2

430 276.0

8 718 227.7

Turning Point 22 Start

205.6

432 579.7

8 717 383.8

3000

Turning Point 22 End

205.7

432 683.9

8 717 347.9

Turning Point 23 Start

206.4

433 337.9

8 717 135.3

3000

Turning Point 23 End

206.5

433 441.9

8 717 099.3

Turning Point 24 Start

208.7

435 520.2

8 716 338.0

3000

Turning Point 24 End

209.2

435 962.7

8 716 133.8

Turning Point 25 Start

210.8

437 312.0

8 715 372.4

3000

Turning Point 25 End

211.3

437 754.5

8 715 168.1

Turning Point 26 Start

215.6

441 873.0

8 713 659.5

15000

Turning Point 26 End

217.7

443 881.6

8 713 078.9

Turning Point 27 Start

253.2

478 536.4

8 705 633.5

4000

Turning Point 27 End

253.3

478 615.8

8 705 617.3

Turning Point 28 Start

259.4

484 581.4

8 704 461.4

4000

Turning Point 28 End

261.3

486 287.1

8 703 683.4

Turning Point 29 Start

262.3

487 130.3

8 703 023.0

6000

Turning Point 29 End

264.3

488 874.3

8 702 074.1

Turning Point 30 Start

340.4

560 742.2

8 677 293.9

5000

Turning Point 30 End

341.0

561 341.8

8 677 128.1

Turning Point 31 Start

341.7

561 992.5

8 676 991.1

5000

Turning Point 31 End

342.3

562 592.2

8 676 825.3

Turning Point 32 Start

346.2

566 301.6

8 675 546.3

8000

Turning Point 32 End

347.6

567 634.4

8 675 211.6

Turning Point 33 Start

348.6

568 689.7

8 675 041.2

4000

Turning Point 33 End

350.3

570 227.7

8 674 449.0

Turning Point 34 Start

351.0

570 811.7

8 674 070.5

8000

Turning Point 34 End

352.9

572 554.8

8 673 220.9

Turning Point 35 Start

356.1

575 549.2

8 672 188.4

5000

Turning Point 35 End

357.9

577 252.6

8 671 915.9

Turning Point 36 Start

375.8

595 230.6

8 672 180.3

4000

Turning Point 36 End

379.6

598 506.7

8 670 557.4

Turning Point 37 Start

384.9

601 635.4

8 666 322.1

3000

Turning Point 37 End

386.7

603 026.9

8 665 294.0

Boundary of offshore area of the Northern Territory with NT Coastal Waters

403.9

619 280.3

8 659 684.9

N/A

 

Route of portion of NT/PL1 pipeline proposed to be isolated and flooded following cessation of conveyance from Bay-Undan field

Feature name

KP

Easting

Northing

Radius (m)

Boundary of offshore areas of Western Australia and Northern Territory

34.2

266 403.5

8 754 577.5

N/A

Turning Point 6 Start

34.5

266 642.1

8 754 141.7

3000

Turning Point 6 End

34.5

266 696.8

8 754 100.6

Turning Point 7 Start

37.1

268 765.5

8 752 506.8

3000

Turning Point 7 End

38.7

270 196.8

8 751 910.0

Turning Point 8 Start

51.8

283 145.0

8 750 170.0

15000

Turning Point 8 End

52.8

284 138.0

8 750 002.4

Turning Point 9 Start

53.6

284 975.9

8 749 831.9

5000

Turning Point 9 End

54.6

285 907.6

8 749 732.0

Turning Point 10 Start

56.2

287 517.2

8 749 711.0

10000

Turning Point 10 End

57.4

288 718.8

8 749 622.7

Turning Point 11 Start

68.2

299 444.1

8 748 181.4

6000

Turning Point 11 End

69.2

300 451.4

8 748 131.6

Turning Point 12 Start

69.7

300 905.7

8 748 147.3

3000

Turning Point 12 End

70.7

301 901.6

8 748 013.5

Turning Point 13 Start

71.7

302 335.6

8 747 878.3

6000

Turning Point 13 End

72.1

303 320.3

8 747 660.5

Turning Point 14 Start

103.5

334 384.2

8 743 486.0

10000

Turning Point 14 End

105.1

335 977.3

8 743 137.7

Turning Point 15 Start

135.5

364 989.2

8 734 263.6

12000

Turning Point 15 End

137.1

366 567.8

8 733 895.3

Turning Point 16 Start

144.6

373 966.8

8 732 688.6

6000

Turning Point 16 End

146.2

375 570.7

8 732 644.4

Turning Point 17 Start

147.8

377 178.7

8 732 816.5

4000

Turning Point 17 End

150.0

379 271.2

8 732 475.2

Turning Point 18 Start

151.6

380 741.3

8 731 801.3

6000

Turning Point 18 End

153.2

382 276.1

8 731 333.6

Turning Point 19 Start

172.5

401 323.2

8 728 227.4

15000

Turning Point 19 End

175.3

404 068.4

8 727 507.7

Turning Point 20 Start

200.3

427 479.0

8 718 932.1

3000

Turning Point 20 End

200.6

427 821.2

8 718 829.4

Turning Point 21 Start

202.8

429 933.8

8 718 330.4

3000

Turning Point 21 End

203.2

430 276.0

8 718 227.7

Turning Point 22 Start

205.6

432 579.7

8 717 383.8

3000

Turning Point 22 End

205.7

432 683.9

8 717 347.9

Turning Point 23 Start

206.4

433 337.9

8 717 135.3

3000

Turning Point 23 End

206.5

433 441.9

8 717 099.3

Turning Point 24 Start

208.7

435 520.2

8 716 338.0

3000

Turning Point 24 End

209.2

435 962.7

8 716 133.8

Turning Point 25 Start

210.8

437 312.0

8 715 372.4

3000

Turning Point 25 End

211.3

437 754.5

8 715 168.1

Turning Point 26 Start

215.6

441 873.0

8 713 659.5

15000

Turning Point 26 End

217.7

443 881.6

8 713 078.9

Turning Point 27 Start

253.2

478 536.4

8 705 633.5

4000

Turning Point 27 End

253.3

478 615.8

8 705 617.3

Turning Point 28 Start

259.4

484 581.4

8 704 461.4

4000

Turning Point 28 End

261.3

486 287.1

8 703 683.4

Turning Point 29 Start

262.3

487 130.3

8 703 023.0

6000

Turning Point 29 End

264.3

488 874.3

8 702 074.1

Turning Point 30 Start

340.4

560 742.2

8 677 293.9

5000

Turning Point 30 End

341.0

561 341.8

8 677 128.1

Turning Point 31 Start

341.7

561 992.5

8 676 991.1

5000

Turning Point 31 End

342.3

562 592.2

8 676 825.3

Turning Point 32 Start

346.2

566 301.6

8 675 546.3

8000

Turning Point 32 End

347.6

567 634.4

8 675 211.6

Turning Point 33 Start

348.6

568 689.7

8 675 041.2

4000

Turning Point 33 End

350.3

570 227.7

8 674 449.0

Turning Point 34 Start

351.0

570 811.7

8 674 070.5

8000

Turning Point 34 End

352.9

572 554.8

8 673 220.9

Turning Point 35 Start

356.1

575 549.2

8 672 188.4

5000

Turning Point 35 End

357.9

577 252.6

8 671 915.9

Turning Point 36 Start

375.8

595 230.6

8 672 180.3

4000

Turning Point 36 End

379.6

598 506.7

8 670 557.4

Upstream Decommissioning Skid Flange Face

379.8

598 710.86

8 670 620.6

N/A

 

Route of Portion of NT/PL1 pipeline proposed to be reused for NT/PL5 Barossa Tie-In

Feature name

KP

Easting

Northing

Radius (m)

Downstream Valve Skid Inboard Hub Face

379.8

598 745.31

8 670 573.86

N/A

Turning Point 37 Start

384.9

601 635.4

8 666 322.1

3000

Turning Point 37 End

386.7

603 026.9

8 665 294.0

Boundary of offshore area of the Northern Territory with NT Coastal Waters

403.9

619 280.3

8 659 684.9

N/A

 

2.      Insert the heading ‘SPECIFICATIONS’ under the ‘ROUTE OF PIPELINE’.

 

3.      In ‘SPECIFICATIONS’ insert the following Basis of Design table and relevant design and manufacture codes and standards:

 

Basis of Design

Parameter

Value Prior to Pipeline Cut

Value after Pipeline Cut

KP000 – KP380

Value after Pipeline Cut

KP380 – KP502

Pipeline Length (km)

502.3

380

(TBC)

102

(TBC)

Volume of gas (m3)

151,000

0

36,765

Design pressure (MPa)

19.8

Maximum Allowable Operating Pressure (MPa)

19.4

Maximum Design Temperature (⁰C)

90

Minimum Design Temperature (⁰C)

0

Design Flow Rate (MMscf/d)

750

Wall Thickness of 28” Riser and Tie-in Spool (mm)

25.8

Wall Thickness of 26” Section (mm)

For temperature de-rated section (KP 0.327 to KP 34): 20.7

For non-temperature de-rated section (KP 34 to KP 502): 20.1

Wall Thickness Corrosion Allowance (mm)

1.5

Material

Carbon Steel

Material Grade

API 5L X65

Anode Type

Al-Zn-In

Anode Spacing

Not greater than every 12 joints

Internal Coating

Epoxy (flow coating)

Internal Coating Thickness (µm)

75

Weight Coating

High Density Concrete

Weight Coating Thickness (mm)

40-120

Connections at Valves and Terminations

Flanged

Design Life (years)*

25

Beach Valve

ANSI Class #1500 Manual Ball Valve

N/A

ANSI Class #1500 Manual Ball Valve

* design life originally 25 years (up to 2030), pipeline since re-rated to 2050.

 

The Bayu-Undan Pipeline was designed and manufactured in accordance with the following main codes and standards (revisions current at that time):

 

The tie-in will be designed and manufactured in accordance with the following main codes and standards (with current revisions):

 

4.       The pipeline route maps are deleted and are replaced with the map at Attachment A.

 

Attachment A

Map showing the route of Pipeline Licence NT/PL1.