BP’s Quad 204 Project involves the redevelopment of the Schiehallion (one of the biggest UK North Sea Fields) and Loyal fields, located west of the Shetland Islands in Blocks 204 and 205 of the UK Continental Shelf (UKCS) at water depths between 300m and 550m.
The Quad 204 Project will extend the life of the two fields, enabling them to continue production beyond 2035. The project was approved in July 2011 and is estimated to cost £3bn (approximately $5bn). Final Commissioning and First Production began in May 2017.
The partners in the project include BP (36.3%), Shell (36.3%), Hess (12.90%), Statoil (4.84%), OMV (4.84%) and Murphy Petroleum (4.84%).
Schiehallion and Loyal fields started production in 1998 and have produced more than 400 million barrels of oil from 54 wells, with approximately 450 million barrels of resource still estimated to be in place. Oil production from the project is expected to peak at 20,000t a day in 2016, and gas production capacity is expected to be 3.5 million cubic feet a day.
Designed for 25 years of operation, the new Quad 204 FPSO is 270m-long, 52m-wide, possess an operating draft of 14m to 20m, and provide accommodation for 125 people.
It has a liquid processing capacity of 47,800t a day (320,000 barrels a day), a storage capacity of one million barrels, and handles 49,300m³ a day of produced water.
The FPSO is powered by four dual-fuel (produced gas or low-sulphur diesel) turbine generators implementing dry low emissions (DLE) system, with one serving as a standby generator. Waste heat recovery units (WHRUs) are featured on the FPSO.
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