Statoil is to plug the a production well on the Vigdis oil field and drill a new well from a sidetrack.
The work is to be done using the Bideford Dolphin, which is operated by Dolphin Drilling AS.
Bideford Dolphin is a semi-submersible drilling facility of the Aker H-3 type.
Vigdis is in 280 metres of water and has been developed using subsea facilities.
The wellstream is piped to Snorre A for processing.
Production at Vigdis began in 1997, with Saga Petroleum as the operator. Statoil took over operatorship in January 2003.