Norway’s Petroleum Safety Authority Norway, PSA, platform has identified serious deficiencies related to planning, approval and execution following a gas leak at Norway’s Gullfaks B platform on 4 December 2010. Based on this event and earlier incidents on Statoil-operated installations, the PSA has asked Øystein Michelsen, the company’s executive vice president for development and production Norway, to assess which measures he considers necessary in light of the identified deficiencies.
The gas escape on Gullfaks B occurred in connection with leak testing after maintenance work on a production well. The gas derived from a volume trapped between the downhole safety valve and the Xmas tree. It proved impossible to operate the emergency shutdown valves on the well.