News
BP / Wood Group PSN
The Clair field is the largest discovered, but not yet producing, hydrocarbon resource on the UKCS. The field is located 75 km West of Shetland in water depths of up to 150m and extends over an area of some 220km2.
It is divided into 9 fault-bounded segments, which have a common free water level and a maximum oil column of some 600m. A gas cap is present in the structurally elevated Ridge segments.
The reservoir is made up of fractured sandstones of Devonian to Carboniferous age with current interpretations suggesting a total volume of oil in place of excess of 410 million metric tonnes of 22 – 23 API oil.
However, there is significant uncertainty both in terms of reserves and the ability to commercially produce the highly fractured reservoir.
The field comprises an extensively layered and fractured sandstone reservoir with significant open fractures and variable matrix quality.
Field Development
Development of the Clair reservoir will be a ‘phased development’. The first phase – ‘Clair Phase 1 Development’ – will target the Core, Graben and Horst segments of the southern area of the reservoir. This first development phase is laterally extensive and relatively shallow, requiring high step-out extended reach wells for maximum drainage from single well access points.
Phase 1 of the Clair development has recoverable reserves of around 250 million barrels of oil. Plateau production is expected to be around 60 thousand barrels of oil a day and 20 million cubic feet of gas per day. Further development phases will be dependent on the performance and success of the Phase 1 Development.
Information courtesy of www.bp.com