The index charts the frequency with which oilfields in the North Sea report zero production compared to those exporting oil into pipelines in any given month.
Global Energy Group and Rigfit7seas have been appointed to deliver the refurbishment of the semi-submersible drilling rig into a plug and abandonment unit.
Operator Equinor is planning start-up during the course of September 2019.
Assuming an early September FID date, under the development schedule to be submitted in the finalised Phase 1 Field Development Plan, First Gas is expected to be reached in July 2021 from the Southwark field in the North Sea.