DONG of Denmark is to appraise the Svane discovery in the Danish sector of the North Sea – block 4/98. DONG acquired the block and field and their operation from ConocoPhillips in 2007. In 2001, an appraisal by ConocoPhillips signalled a large gas reservoir, but technical problems prevented verification of the results.
At 6,000m (19,700ft), this accumulation is at a greater depth than other Danish fields and is made even more challenging as it is high-pressure and high-temperature.