Decommissioning Projects
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Field Type Location Water Depth (m) First Production Contact
Gas 44/26a 71 1996
Niall Anderson
UK Decommissioning procurement advisor
01224 650909
Project Summary
The Schooner SNS gas field is due to be decommissioned along with it's sister field, Ketch starting in September 2018. The project will take approximately 4 years to complete. The fields each have a normally unmanned platform on them, and an export pipeline taking produced gas to the nearby Murdoch platform, which is operated by ConocoPhillips. The Schooner platform has 11 wells drilled from it, and the Ketch has 9 wells. Ketch is in slightly shallower water at 54 metres, but the platforms are of identical design.

The abandonment effort will consist of plugging and abandoning all the platform wells plus one subsea completion (NW Schooner), cleaning and burying pipelines and the removal and disposal of both platform topsides (approx. 1,250 tonnes each) and jackets (approx. 2,000 tonnes each).

The Decommissioning Programmes for both platforms are with BEIS for review and the draft SCAP has been submitted to OGA and a follow up meeting held.

Gate review of well abandonment held in mid September and endorsement gained to advance into concept define.

Decision made to restrict size of Company PMT and to immediately tender for Well Management Company to support PMT and manage large areas of the work.SCAP to be updated accordingly.


Description Contact Name Telephone Number Email Address
BEIS has commented on the Project EIA that all pipeline mattresses where the concrete is bound by polypropylene rope have to be recovered and disposed of in an appropriate manner. This will add significant technical complexity to the Project and will have cost and schedule impacts. niall anderson 01224 650929
To evaluate potential cost benefit versus "manageability" of running 2 rigs in parallel as opposed to 1 executing work sequentially. niall anderson 01224 650929
Potential deferment of tax benefit by reusing platform assets on "non oil and gas" basis. niall anderson 01224 650929
Defining best contracting "blend" of Company PMT, Rig Owner, Well Services Providers and Well Management Companies to provide cost and execution certainty. niall anderson 01224 650929
Last Updated: 01-NOV-2018 13:56:53

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