The Usan development in Block OML 138 lies around 100 kilometres off the southeast coast in water depths ranging from 750 to 850 meters.
Its spread moored floating production, storage and offloading (FPSO) vessel is designed to process 180,000 barrels per day and with a crude storage capacity of two million barrels.
Forty-two wells are connected to the FPSO by a 70-kilometre subsea network.
Exploration