Gullfaks is an oil and gas field in the Norwegian sector of the North Sea operated by Statoil. It was discovered in 1979, in block 34/10, at a water depth of 135 meters. The initial recoverable reserve is , and the remaining recoverable reserve in 2004 is . This oil field reached peak production in 2001 at .
The Schlumberger geological modelling software product Petrel uses the Gullfaks field as the sample data set for its introductory course.