Petrofac has successfully completed its well decommissioning contract for Tullow Oil in the UK Continental Shelf.
The firm claimed that its decommissioning strategy, in support of Tullow Oil’s well plugging and abandonment campaign in the Southern North Sea (SNS), has saved $2.5m compared with conventional approaches.
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As Duty Holder, Petrofac deployed well engineering and project management services under the contract spanning six months for the Horne & Wren asset.
Well plugging and abandonment campaign was an important aspect of the schedule as part of Tullow Oil’s Thames Area Complex decommissioning project in the SNS.
Petrofac engineering and production services managing director for well engineering Alex Macdonald said: “This was a challenging but highly rewarding project.
"In addition to providing a highly cost-effective solution, we also saved time on the project by proposing optimisation solutions to allow the preparatory works to be integrated as simultaneous operations.
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By GlobalDataTullow Oil project manager Ian Manners said: “Petrofac went above and beyond our expectations, with a high level of engagement achieved by collaborating with us as a single team.”
Under the contract, Petrofac delivered conceptual design, detailed planning, procurement, subcontractor management, and full execution of the plug and abandonment operations.
It had used well project management software, called WellAtlas, to ensure efficient and assured project delivery.
Petrofac said that as Horne & Wren is a normally unmanned asset, there were a several challenges to overcome in carrying out of the contract. Petrofac’s integrated cross discipline team developed technical solutions to mitigate these, including using a jack-up lift barge rather than a jack-up rig. It also deployed a pipe recovery technique rather than a heavy-lift vessel.
