Following 5 days of close monitoring, Total is now able to confirm the success of the intervention conducted on May 15th on the leaking G4 well on the Elgin complex, 240 kilometers from Aberdeen in the UK North Sea. To regain control of the well, heavy mud was pumped into G4 well from the semi-submersible drilling rig West Phoenix. Pumping heavy mud started on May 15th at 9.20 a.m. (local time) and the leak was stopped 12 hours later.
Since then, several inspection visits to the wellhead platform have confirmed that the leak has completely stopped.
Following the success of the well intervention, the next phase will be to re-man the Elgin complex and restart the Rowan Viking drilling rig in order to set cement plugs in the G4 well. This phase, aiming at completing the plugging and permanent abandonment procedure of the G4 well, will take several weeks.
Once the first cement plug is set in the G4 well by the Rowan Viking, the drilling of the ongoing relief well with the Sedco 714 will be stopped. In consultation with the appropriate authorities, it has been decided that drilling a second relief well by the Rowan Gorilla V is no longer necessary and has therefore been cancelled.