Decommissioning Insight 2017

DECOMMISSIONING INSIGHT 2017

In the Dutch sector, the few wellhead oil platforms that were originally equipped with a fixed drilling derrick have had these removed, which means all platform well P&A will be carried out with a jack-up rig or rig-less methods where available.

For subsea wells requiring a rig, this will typically depend on water depth. For wells located in shallower water, a jack-up rig is typically used as they operate at a lower cost.

Figure 8: Forecast Rig Type for Well P&A Across the North Sea, 2017 to 2025

Platform Wells

NNS and WoS

CNS

SNS and Irish Sea

Integral rig

98%

Integral rig Modular rig

78%

Modular rig Other rig-less 19% Stand-alone jack-up 55% To be decided 21% 5%

Stand-alone semi-submersible

11% Stand-alone jack-up 11%

2%

Danish Continental Shelf

Norwegian Continental Shelf Stand-alone jack-up 40% Integral rig 47% More than one rig type 13%

Stand-alone jack-up

90% 10%

Other rig-less

Subsea Wells

CNS Other rig-less

SNS and Irish Sea Stand-alone jack-up 69% To be decided 31%

NNS and WoS

11%

Other rig-less 11% Stand-alone jack-up 11% Stand-alone semi-submersible 78%

Stand-alone jack-up Stand-alone semi-submersible

2%

84%

To be decided

3%

Danish Continental Shelf Stand-alone jack-up 100%

Norwegian Continental Shelf Stand-alone jack-up 91% Semi-submersible 7% To be decided 2%

Combined Wells

Dutch Continental Shelf (platform and subsea combined) Stand-alone jack-up 50% Other rig-less 30% To be decided 20%

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