Decommissioning Insight 2018

DECOMMISSIONING INSIGHT 2018

8 The Scope of Decommissioning

In Summary The Decommissioning Work Breakdown Structure (WBS) is detailed in Oil & Gas UK’s Decommissioning Cost Estimate Guidelines . 5 The WBS shows all elements of a typical decommissioning project. Different expertise is required within each WBS element, from engineering practitioners at the front end, to operational expertise as the installation is made safe, to lifting scopes, subsea scopes and finally re-use, recycling and disposal. 6

Operator Project Management 1

Figure 27: Decommissioning Work Breakdown Structure

OUT OF SERVICE

OUT OF SERVICE

2

3

4

5

6

9.8%

48.8%

3.0%

3.1%

6.6%

9.8%

48.8%

3.0%

3.1%

6.6%

Post-CoP OPEX 5

Well Decommissioning

Facilities / Pipeline De-Energising

Topsides Preparation

Topsides Removal

5 Oil & Gas UK – Decommissioning Cost Estimate Guidelines 6 Operational expenditure after production has ceased.

50

6.75%