Decommissioning Insight 2018

4.1 Expenditure Breakdown

Figure 5 shows the spread of costs over a decommissioning project. The forecast proportions of decommissioning expenditures over the next ten years bear similarities to previous Decommissioning Insight reports.

Figure 5: WBS Expenditure by Activity, 2018 to 2027

Topsides & Substructure Onshore Recycling ● Onshore waste handling ● Deconstruction ● Decontamination

Subsea Infrastructure & Pipelines ● Removal of Pipelines ● Removal of Mattresses ● Removal of Subsea structures

Site Remediation and Post-decommissioning Monitoring ● Debris Clearance ●Monitoring Requirements

Removals ● Removal activities for the topsides ● Removal activities for the substructure

4

2%

12%

Facilities & Pipeline De-energising and Topside Preparation ● Engineering down and cleaning topsides and pipelines ● Preparation of platform for unattended mode

2%

13%

5%

Well Decommissioning ● Spread rate and services

associated with phase 1, phase 2 and phase 3 decommissioning of wells Operator Costs ● Project management services throughout Preparation of decommissioning programme ● (Post CoP OPEX) Operational expenditure after occurrence of Cessation of Production

49%

17%

Source: Oil & Gas UK, OGA

17