Deepwater reserves deliver steady production

Akpo – a world-class discovery

CNOOC International has a 45% working interest in the OML130 block located approximately 150 kilometres off the coast of Port Hartcourt, Nigeria. This is alongside its partners Total Upstream Nigeria Limited, who is the operator of the block and holds a 24% working interest, Prime Oil and Gas (16% working interest) and South Atlantic Petroleum Limited (15% working interest).

The OML130 block, encompassing 648 square kilometres, is a deepwater project comprised of four oil fields: Akpo, Egina, Egina South and Preowei. Akpo – one of the world-class discoveries drilled in the OML130 block – has maintained stable net production of 56,000 bbls/d since 2009.

Egina production underway


Production from the Egina Field, also in the OML130 block, commenced in early January 2019. The Field is located 150 kilometres off the coast of Nigeria in approximately 1600 meters of water. The development consists of a Floating Production Storage and Offloading (FPSO) unit and a Subsea Production System. The project is expected to reach its peak production of approximately 200,000 bbls/d in 2019.

Lending a hand to Lagos

Production and potential in Usan

The Usan oil development is located 80 kilometres off the southern coast of Nigeria. Discovered in 2002, the Usan field began producing oil in February 2012.

Located in depths ranging from 780 to 850 metres of water, the Usan field development is comprised of a subsea production system linked to the Usan FPSO and an offloading buoy to accommodate export tankers. The Usan FPSO and subsea facilities were completed and primarily installed during 2011.

Nexen Petroleum Nigeria Limited, as subsidiary of CNOOC Limited, has a 20% working interest in Usan and is developing the oil field along with Esso E&P Nigeria (Offshore East) Limited, who is the operator. Total E&P Nigeria Limited and Chevron Petroleum Nigeria Limited are also partners on the project. Work is underway to identify additional development opportunities through exploration and appraisal drilling.

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