Decommissioning Insight 2017

DECOMMISSIONING INSIGHT 2017

Figure 9: Forecast Topside and Substructure Removal Across the North Sea, 2017 to 2025 11

Norwegian Continental Shelf

Danish Continental Shelf

Dutch Continental Shelf

NNS and WoS

SNS and Irish Sea

CNS

Total

Number of platforms

19

12

67

14

17

77

206

26manned and 51 unmanned 11

Small steel

2

-

61

2

12

-

Large steel Gravity based structure Total topside weight to be removed (tonnes) Total substructure weight to be removed (tonnes)

17

8

6

11

5

-

4

-

1

-

-

5

224,458 238,110

78,760

123,205

75,602

119,665 859,800

128,024

52,655

68,979

115,176

58,602

84,502

507,938

Water depth

45 to 143 metres

118 to 190 metres

18 to 73 metres

66 to 174 metres

37 to 60 metres

22 to 50 metres

18 to 190 metres

UK Central North Sea • Nineteen platforms and eight floating, production, storage and offloading (FPSO) vessels are forecast for complete or partial removal to 2025. • Two are small steel structures weighing less than 4,000 tonnes, while the remainder are large steel structures weighing between 4,500 and 56,600 tonnes. • Operators are actively looking to group activity into multi-platform removal campaigns, particularly for substructures that can be more easily left in situ until decommissioning activity aligns with that of other infrastructure in the area. • £843 million is forecast to be spent on topside and substructure removal to 2025.

11 Platforms in The Netherlands have been categorised differently into manned and unmanned installations.

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