Western Europe's biggest petroleum producer is falling out of love with oil.

To the dismay of the nation's powerful oil industry and its worker unions, the opposition Labor Party over the weekend decided to withdraw its support for oil exploration offshore the sensitive Lofoten islands in Norway's Arctic, creating a solid majority in parliament to keep the area off limits for drilling.

"The whole industry is surprised and disappointed,": Karl Eirik Schjott-Pedersen, head of the Norwegian Oil and Gas Association. Credit:Bloomberg

The dramatic shift by Norway's biggest party is a significant blow to the support the oil industry has enjoyed, and could signal that the Scandinavian nation is coming closer to the end of an era that made it one of the world's most affluent.

Oil companies led by state-controlled Equinor ASA, the biggest Norwegian producer, have said that gaining access to Lofoten is key if the country wants to maintain production as resources are being depleted. Estimates suggest that 1 billion to 3 billion barrels could be hiding off the archipelago, which is also considered a natural wonder.