Decommissioning Insight 2015

1

Forecast Activity 2015 to 2024

Central and Northern North Sea/West of Shetland

Southern North Sea and Irish Sea

Total UK Continental Shelf

2

Number of wells for plugging and abandonment Proportion of wells that are platform wells

950

274

1,224

55%

73%

-

3

Topside modules to be removed Topside weight to be removed

255

66

321

288,000 tonnes

78,890 tonnes

366,890 tonnes

4

Number of platforms

22

57

79

Substructure weight to be removed Number of mattresses to be removed Subsea infrastructure to be removed Number of pipelines to be decommissioned Length of pipelines to be decommissioned

105,140 tonnes

46,200 tonnes

151,340 tonnes

5

6,145

3,350

9,495

80,230 tonnes

2,250 tonnes

82,480 tonnes

6

598

179

777

2,189 kilometres

3,429 kilometres

5,618 kilometres

7

Total tonnage coming onshore

492,250 tonnes

127,330 tonnes

619,580 tonnes

8

Average Forecast of Costs from 2015 to 2024 in the Central and Northern North Sea/West of Shetland

2014 Survey

2015 Survey

9

Platform well P&A

£4.8million

£4.1million

Subsea exploration and appraisal well P&A

£17.4million

£7.8million

Subsea development well P&A

£11.6million

£9.9million

Topside removal cost per tonne

£2,900

£3,300

Substructure removal cost per tonne

£4,300

£4,800

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