North Sea gas maintenance schedule: Adds Troll outage

OPERATOR

LOCATION

OUTAGE DATES

OUTAGE DESCRIPTION/IMPACT

2021 OUTAGES

Fluxys

Interconnector

Jul 6, 0600 CET - Mar 31, 2028 0600 CET

UK import capacity reduction to 31,392,673 kWh/h; unplanned equipment maintenance

2025 OUTAGES

INEOS

FPS system

4Q (25 November)

Train 3 TAR has commenced with a current forecast duration of twelve (12) weeks

2026 OUTAGES

Gassco

Nyhamna

Jul 04, 0600 CET- Sep 24, 0600 CET

19.8 mcm/d; planned corrective maintenance

Serica Energy UK

St Fergus

Aug 01, 0600 BST - Sep 17, 1200 BST

4.1 mcm/d; planned gas production field unvailability

Gassco

Kollsnes

Aug 12, 0600 CET - Sep 22, 0600 CET

16.0-40.0 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Aug 17, 0400 BST - Sep 27, 0500 BST

103 GWh/d; yearly maintenance

Gassco

Sleipner

Aug 28, 0600 CET - Sep 22, 0600 CET

11.3 mcm/d; yearly maintenance

SSE

Aldbrough

Aug 28, 1143 BST - Sep 16, 1800 BST

74.44 GWh/d; unplanned injection unavailability

Perenco

Bacton

Aug 31, 0600 BST - Sep 24, 0600 BST

4.2 mcm/d; planned maintenance shutdown

Fluxys

Interconnector

Sep 01 - Sep 20

Planned maintenance shutdown

Centrica UK

Rough

Sep 02, 0500 BST - Oct 01, 0500 BST

0.7 mcm/d; Planned injection unavailability

SSE

Atwick

Sep 06, 0300 BST - Sep 24, 0900 BST

30 GWh/d; Planned withdrawal unavailability

Gassco

Kollsnes

Sep 06, 0600 CET - Sep 19, 0600 CET

26 mcm/d; yearly maintenance

Gassco

Troll

Sep 07, 0600 CET - Sep 19, 0600 CET

13.2 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Sep 08, 0400 BST - Oct 03, 0400 BST

185 GWh/d; Gas treatment plant unavailability

Gassco

Karsto

Sep 10, 0600 CET - Sep 25, 0600 CET

12.6 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Sep 11, 0400 CET - Sep 19, 0400 CET

115 GWh/d; Gas treatment plant unavailability

TAQA

UGS Bergermeer

Sep 11, 0400 CET - Sep 22, 0400 CET

113 GWh/d; Gas treatment plant unavailability

Gassco

Troll

Sep 12, 0600 CET - Sep 17, 0600 CET

18.2 mcm/d; yearly maintenance

SSE

Aldbrough

Sep 12, 0500 BST - Sep 25, 1800 BST

0.43 TWh; Planned Outage, Ald. 7 Maintenance & Intervention

Total EP UK

Teesside CATS (Culzean)

Sep 14, 0600 BST - Oct 02, 0900 BST

16 GWh/d; planned gas production field unavailability

Gassco

Aasta Hansteen

Sep 15, 0600 CET - Sep 17, 0600 CET

16.1 mcm/d; yearly maintenance

Gassco

Nyhamna

Sep 15, 0600 CET - Sep 22, 0600 CET

51.8 mcm/d; yearly maintenance

Gassco +

Troll

Sep 16, 0600 CET - Sep 17, 0600 CET

25 mcm/d; corrective maintenance

Gassco

Troll

Sep 17, 0600 CET - Sep 18, 0600 CET

30 mcm/d; yearly maintenance

Gassco

Troll

Sep 18, 0600 CET - Sep 19, 0600 CET

18 mcm/d; yearly maintenance

Gassco

Kollsnes

Sep 21, 0600 CET - Sep 22, 0600 CET

40 mcm/d; yearly maintenance

Gassco

Troll

Sep 21, 0600 CET - Sep 22, 0600 CET

12.0 mcm/d; yearly maintenance

Gassco

Zeebrugge

Sep 21, 0600 CET - Sep 25, 0600 CET

21.1 mcm/d; upstream restriction

TAQA

UGS Bergermeer

Sep 22, 0400 CET - Oct 03, 0400 CET

185 GWh/d; gas treatment plant unavailability

Gassco

Kristin

Sep 22, 0600 CET - Sep 24, 0600 CET

13.8 mcm/d; yearly maintenance

Gassco

Asgard

Sep 23, 0600 CET - Sep 24, 0600 CET

26.9 mcm/d; yearly maintenance

Gassco

Skarv

Sep 23, 1328 CET- Sep 24, 0600 CET

22.4 mcm/d; yearly maintenance

Gassco

Oseberg

Sep 23, 0600 CET - Sep 30, 0600 CET

13.5 mcm/d; yearly maintenance

Gassco

Kårstø

Sep 24, 0600 CET - Sep 29, 0600 CET

19.6 mcm/d; yearly maintenance

Gassco

Aasta Hanstenn

Sep 24, 0600 CET - Sep 25, 0600 CET

16.8 mcm/d; yearly maintenance

TAQA +

UGS Bergermeer

Sep 25, 0400 CET - Sep 30, 0400 CET

96 GWh/d; gas treatment plant unavailability

TAQA

UGS Bergermeer

Sep 27, 0400 BST - Oct 03, 0500 BST

185 GWh/d; yearly maintenance

Gassco

Nyhamna

Sep 28, 0600 CET - Nov 24, 0600 CET

19.8 mcm/d; yearly maintenance

Gassco

Aasta Hansteen

Sep 29, 0600 CET - Oct 03, 0600 CET

17.7 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Sep 29, 0400 BST - Sep 30, 0400 BST

41 GWh/d; other unavailability

BBL company

BBL pipeline

Sep 30, 0600 CET - Oct 15, 0600 CET

Planned maintenance

Gassco

Zeebrugge

Sep 30, 0600 CET - Oct 01, 0600 CET

22.2 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Oct 03, 0500 CET - Oct 31, 0500 CET

497 GWh/d; gas treatment plant unavailability

Gassco

Nyhamna

Oct 05, 0600 CET - Nov 02, 0600 CET

19.8 mcm/d; yearly maintenance

Gassco

Oseberg

Oct 10, 0600 CET - Oct 23, 0600 CET

27.5 mcm/d; yearly maintenance

Gassco

Troll

Oct 14, 0600 CET - Oct 15, 0600 CET

11 mcm/d; yearly maintenance

Gassco

Aasta Hansteen

Oct 15, 0600 CET - Oct 19, 0600 CET

20.7 mcm/d; yearly mainetenance

Kistos Energy Storage Ltd

Hill Top

Oct 22, 0800 BST - Oct 22, 1800 BST

0.6477TWh; planned storage unavailability

SSE

Aldbrough

Oct 25, 0500 BST - Oct 31, 1800 BST

97.78 GWh/d; planned injection unavailability

TAQA

UGS Bergermeer

Oct 31, 0500 BST - Nov 02, 0500 BST

185 GWh/d; other unavailability

TAQA

UGS Bergermeer

Nov 11, 0500 BST - Nov 20, 0500 BST

36 GWh/d; compression station unavailability

TAQA

UGS Bergermeer

Nov 30, 0500 BST - Dec 01, 0500 BST

12 GWh/d; compressor station unavailability

TAQA

UGS Bergermeer

Dec 01, 0500 BST - Dec 23, 0500 BST

22 GWh/d; compression station unavailability

Gassco

Visund

Dec 01, 0600 CET - Dec 02, 0600 CET

14.8 mcm/d; yearly maintenance

TAQA

UGS Bergermeer

Dec 01, 0500 BST - Dec 13, 0500 BST

38 GWh/d; Compressor station unavailability

TAQA

UGS Bergermeer

Dec 09, 0400 BST - Dec 23, 0500 BST

31 GWh/d; compressor station unavailability

TAQA

UGS Bergermeer

Dec 13, 0500 BST - Dec 23, 0500 BST

34 GWh/d; compressor station unavailability

TAQA

UGS Bergermeer

Dec 18, 0500 BST - Dec 19, 0500 BST

12 GWh/d; compressor station unavailability

INEOS

FPS system

2026

The annual Unity ESDV closure test, Cruden Bay NGL ESDV leak test, and Forties Charlie equipment tests will take place (3Q- Aug 4); the Old Lock Berth Outage will take place (2Q)