Decommissioning Insight 2019

CASE STUDY — CHRYSAOR

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In June 2014 offshore operations on the UK’s largest decommissioning project commenced in the southern North Sea. Chrysaor’s decommissioning obligations in the SNS basin consist of 140 wells, 1,650 kilometres of pipelines, 38 platforms and nine subsea installations, with a combined weight of approximately 140,000 tonnes. Onshore decommissioning of the Theddlethorpe Gas Terminal is also part of the project. Through safe and efficient execution, innovation and with a clear focus on cost minimisation, 93 wells have been decommissioned to date, all pipelines flushed and cleaned, and 26 platforms are ready for removal. Campaigns for platform removal have commenced, with nine satellites planned for 2019 (five removed at the time of writing), and these will continue annually through to 2024. The clear focus has been to minimise pre- and post-cessation of production costs and reduce operational risk. The total estimated project cost has decreased by over 20 per cent since 2014. In addition, Chrysaor has worked collaboratively with several connected third-party infrastructure owners to facilitate their respective decommissioning projects. The safe and successful execution of the project to date has positioned the Chrysaor Team to deliver the remaining scopes of work in a cost effective and environmentally responsible manner.

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