Solution Excerpt: "Marathon Petroleum Company (Norway) is converting the Multipurpose Shuttle Tanker (MST) Odin, renamed “Alvheim”, to an FPSO (floating production, storage and offloading) vessel to serve the Norwegian Continental Shelf. The Alvheim development is operated by Marathon Petroleum Company (Norway) (65%), with working interest owners ConocoPhillips (20%) and Lundin Petroleum (15%). Built in 2001 by Izar (formerly Astilleros Espanoles), the vessel was received by Marathon from Statoil in January 2005. It has an overall length of 252m and 42m beam; after conversion, the vessel will have a storage capacity of 560,000 barrels of oil.
The Alvheim FPSO project has six main elements: drilling and completion of wells; installation of sub-sea infrastructure; construction of the Turret Mooring and Swivel (TMS) system; hull upgrade; topsides and integration; and Operations readiness. This hull upgrade is being performed at Keppel Shipyard in Singapore. Topside and Integration is undertaken by Vetco Aibel, with the work mainly being performed in Norway. To address the many design issues and reduce the risk of construction interferences, the engineering team selected Aveva's VANTAGE PDMS 3D design system. However, before design could begin, two significant obstacles had to be overcome-the lack of accurate as-built drawings and the desire for a 3D as-built model for use in PDMS. To address these needs, Capnor Laser Scanning Services (formerly Hi-CAD Norway), headquartered in Stavanger, Norway with offices in Krakow, Poland, and Houston, Texas, USA, was awarded a contract to use laser scanning to acquire as-built data and create an accurate 3D surface model from the scans."
To read more of the Leica Geosystems TruStory, "FPSO Vessel Conversion As-builts with Leica HDS3000 and Cyclone," download the case study in PDF format in the Downloads box.