Usan Field Gets Makeover in Q1 2008 Offshore Nigeria

During the first quarter of 2008, Nexen commenced development of the Usan field, offshore Nigeria. The field development plan includes a floating production, storage and offloading vessel with a storage capacity of two million barrels of oil. All major contracts for deep-water facilities have been awarded and contractors are mobilizing for detailed engineering and project execution. Our capital investment is expected to be within the range of US$1.6 to US$2.0 billion over the development period, with an estimated 2008 capital commitment of approximately US$300 million. The Usan field is expected to come on stream in early 2012 and will ramp up to a peak production rate of 180,000 bbls/d (36,000 bbls/d net to us).

The Usan field development is located in OML 138 and is covered by the original production sharing contract for OPL 222 issued in 1993, with the Nigerian National Petroleum Corporation as concessionaire. The contract conveys the right to develop and produce crude oil and continue with exploration activity. We are currently processing three-dimensional seismic in anticipation of further exploratory drilling in the area. The Usan field was discovered in 2002 and is located approximately 100 kilometers offshore in water depths ranging from 750 to 850 meters. Nexen has a 20% interest in exploration and development along with Elf Petroleum Nigeria Limited (20% and Operator), Chevron Petroleum Nigeria Limited (30%) and Esso Exploration and Production Nigeria (Offshore East) Limited (30%).