The Siri field operated by Statoil in the Danish North Sea is now unlikely to come on stream before the New Year.
Plans called for first oil to flow from this development in November, but two attempts to install the production platform have been defeated by storms.
"It's clearly disappointing that we're not coming on stream this year," admits Siri operations vice president Kjell Ravndal. "But we can't do much about the weather."
The platform was originally towed from Stavanger on 1 October and reached Siri two days later, when it should have been placed on the storage tank already standing on the field.
But high waves prevented this operation, and the structure was towed to shelter in Flekkefjord on Norway's south-west coast. A second installation attempt last week also had to be abandoned.
The hope is that a new weather window will open again as soon as possible.