Sources said a final investment decision on Bonga SW — which extends into Chevron operated acreage where it is called Aparo — could even come in 2012.

However, that is a date that one project watcher viewed as being “extremely unlikely”, largely because it is unclear when Nigeria’s Petrol­eum Industry Bill will become legislation.

Shell originally began prequalifying contractors for Bonga SW-Aparo in 2005 but unitisation issues with Chevron, among other things, put paid to that earlier plan which was then based around a leased floating production, storage and offloading vessel.

A