The prequalifiers are Italy's Snamprogetti, Paris-based Technip-Coflexipwith the local National Petroleum Construction Company, Chiyoda Corporation and JGC Corporation, both of Japan, and Fluor Daniel and Kellogg Brown & Root, both of the US.

The project is estimated to cost $300 million-350 million and is effectively an expanded version of the surface upgrade and gas reinjection schemes, which Adco had previously tendered.

The scope of works on the estimated 32-month contract includes the construction of a new degassification plant with a nameplate capacity of 730,000 barrels a day (b/d) and the replacement of the existing two-phase gas separators, each of 50,000 b/d, with four new three-phase separators, each of 120,000 b/d.

The project will also entail the installation of facilities for the reinjection of 95 million cubic feet a day of gas and 120,000 b/d of water into the G, F and D reservoirs. It will tackle a rising water cut and falling water reservoir pressure. A re-engineering study for the project has been carried out by Snamprogetti.

The US' Parsons International is acting as project management consultant for the scheme (MEED 6:9:02).