DUC exports of natural gas rose to 480 million cubic metres from 440 million in October and was down from 570 million in the same month a year ago, Maersk said.
DUC is responsible for most of the petroleum output from Denmark's North Sea oil and gas fields. Denmark is the third-biggest producer in western Europe after Norway and Britain.
Danish shipping and oil group A.P. Moller-Maersk owns 39 percent of DUC. Royal Dutch Shell Group has 46 percent and Chevron a 15 percent stake in the partnership.