Maersk Oil, the oil and gas arm of Danish shipping and oil group A.P. Moller-Maersk (MAERSKb.CO), said it was taking precautionary measures, investigating whether a pipeline could be leaking, and has alerted the authorities.
Rolf is linked to the Gorm platform by a 17-kilometre pipeline, and oil was observed on the surface of the water by a helicopter flying between the two units, Maersk Oil said.
Maersk has activated an oil spill contingency plan, including floating boom barriers to contain any spill, and is mobilising a remotely operated vehicle to check if the pipeline has been breached, the company said.
The Danish Energy Agency, Environmental Protection Agency and the navy have been informed, Maersk Oil said.