 In April 2010 it demerged its assets on the United Kingdom Continental Shelf into Petrofac's Energy Developments unit to form the stand-alone company EnQuest.In 2010, Lundin Petroleum made a large discovery on the Avaldsnes prospect in PL501 on the Utsira High in the North Sea, estimated to contain recoverable resources of of oil equivalent.The discovery was later renamed Johan Sverdrup oil field.