Anglo-Dutch supermajor Shell revealed on Thursday that during a flyover of its assets in the path of Hurricane Ida that damage was observed to its West Delta-143 offshore facilities.

"When it is safe to do so, we will send personnel offshore to provide a closer inspection of these facilities to understand the full extent of the damage and the degree to which our production in the Gulf of Mexico will likely be impacted," Shell said in a statement.

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The WD-143 facilities serve as the transfer station for all production from Shell’s assets in the Mars corridor in the Mississippi Canyon area of the US Gulf to onshore crude terminals.

“At the early phase of assessment and recovery, approximately 80% of Shell-operated production in the Gulf of Mexico remains offline,” the company said. No indication was given as to how much or whether WD-143 was part of that total.

Shell’s Perdido asset in the southwestern Gulf of Mexico was never disrupted by the hurricane, and its floating production, storage and offloading vessel, the Turritella, at the Stones field is currently back online.

All of the company’s other offshore assets remain shut in and remain fully evacuated at this time. The company did not observe any visible structural damage to the rest of its offshore assets.