Decommissioning
Perenco has completed the decommissioning of its Leman South and Durango subsea assets in the UK Southern North Sea (SNS).
On Monday, the operator announced that the two assets had been decommissioned in a single campaign involving the plugging and abandonment of wells and the removal of associated subsea infrastructure, using the jack-up vessel Haeva, which is owned by the Netherlands-based company Petrodec.
According to the UK regulator, the North Sea Transition Authority, Petrodec won the contract to decommission the Durango subsea asset in Block 48/21a-4z in May 2025, and the contract to decommission the Leman South asset in Block 53/02a-15Y in December of that year. Both contracts were estimated to be valued at less than £25 million ($33 million).
Perenco added that Petrodec’s Haeva unit had previously completed subsea abandonment projects for the Gawain, Arthur and Davy fields. The Haeva is a four-legged jack-up facility designed for operations in water depths of up to 65 metres.
“The Leman South and Durango campaigns were not routine P&A projects. They demonstrated Perenco’s ability to deliver large-scale, technically complex subsea well abandonment and infrastructure recovery using an innovative, single-campaign approach centred on Petrodec’s Haeva rather than relying exclusively on high-cost drilling rigs and standalone offshore projects,” commented Jo White, Perenco UK SNS managing director.
Perenco has another removal campaign planned for the Southern North Sea — Indefatigable (Inde) 18A — involving the removal of a drilling platform and a production platform’s topsides and jackets in 2027 and 2028.
