A North Sea drilling rig stands on the distant horizon beyond the Oseberg A offshore gas platform operated by Statoil ASA in the Oseberg oil field 140kms from Bergen, Norway, on Friday, Jan. 17, 2014. Statoil, Norway's biggest energy company, sees the potential to keep domestic oil and gas output at today's levels until 2025 and possibly beyond even as it tightens spending amid rising costs. Photographer: Kristian Helgesen/Bloomberg via Getty Images