white rose oilfield development application - Husky Energy

Engineering and design practices will be common across the project and all designs will conform torelevant codes and standards. Generally accepted international standards, such as the AmericanNational Standards Institute/American Society of Mechanical Engineers specifications and AmericanPetroleum Institute recommended practices, will be applied, as appropriate. The most recent editions ineffect are as of October 2000.The FPSO design will be targeted for the following operational capabilities:• disconnect from its mooring on the approach of an iceberg of mass greater than 100,000 t;• withstand impact of icebergs up to 100,000 t;• continuous production in one-year storm conditions;• station-keeping in 100-year storm conditions;• operation in moderate sea-ice up to concentrations of 50 percent ice cover; and• normal planned disconnection during one-year storm conditions.The operating manuals will be written to define the limits for operation imposed by safety equipmentand environmental considerations.The South White Rose oilfield will be developed using subsea completions tied back to a mono-hulltype FPSO unit, permanently moored in approximately 125 m of water, with the crude oil transported tomarket by shuttle tankers. Accommodation, production separation, water injection, gas lift, gasreinjection, and crude export facilities will be provided on the FPSO.Subsea wellheads will be located in glory holes to protect them from iceberg scour. Equipment withinthe glory hole will be designed such that the top is a minimum of 2 to 3 m below the mudline.Manifolds and flowlines will be designed fail-safe to minimize any harmful environmentalconsequences should they fail or be damaged. Flowline systems will be designed to allow theflushing/purging of production lines in the case of iceberg scour risk. Their location on the seafloor willgive ease of access for inspection, testing, repair, replacement or removal. Emergency shutdown valveswill be provided. These will ensure the safety of personnel and minimize environmental effects in theevent of accidental damage to the production facilities.The FPSO will require a storage capacity of approximately 111,000 and 135,000 m 3 (700,000 and850,000 barrels), representing approximately eight to ten days oil production. It must be capable ofhandling peak oil production of between 12,000 and 18,000 m 3 (75,000 to 110,000 barrels) per day,peak gas production of between 6 and 7 million m 3 per day and peak water production of between15,000 and 30,000 m 3 per day. Due to the presence of icebergs at the field location, the FPSO will havethe added capability to disconnect and move off location under its own power.White Rose DA Project Summary • January 2001 Page 55