The objective is to develop a preliminary design of a Floating, Production, Storage, and Offloading (FPSO) vessel. This facility is self-contained and processes, stores, and offloads crude oil products. The vessel operation site is the deep water of Gulf of Mexico. The scope of this project is limited to designing a stable, weathervaning hull, and single-point mooring system. ABS and API guidelines are used to provide structural requirements and safe mooring sizing.
The whole project is divided into three parts. Part I focuses on ship sizing and hydrostatics and addresses main design areas (a), (b), (c), and (d), shown below. Part II focuses on seakeeping analysis and addresses design area (e). Part III focuses on mooring system design and addresses design areas (f) and (g).
The project is to be completed in team with each individual responsible for the report and discussion of a separate subject. Each team contains 2~3 members. A draft report for each design subject and a final report and presentation for the whole design project are required.
Three pieces of design software were used for the design project. They are: PARAMARINE™ for hull form design and stability analysis, WAMIT® for sea-keeping performance analysis, and RISER-SIM for mooring system design. Access to this software is restructured; alternative software options for completing this project are A, B, and C.
PARAMARINE: PARAMARINE is software developed by Qinetiq. With the aid of this software most, of the spokes of the ship design spiral were addressed. The design was based on various rules such as the pertinent for FPSOs classification rules of ABS, API, MARPOL, etc. (see Design Project References below). The rules were presented to the students in parallel with the software instructions. The key procedures in the application of PARAMARINE for the project are:
WAMIT: Though PARAMARINE has the capability of sea-keeping analysis for floating ships, it does not provide the prediction of wave drift loads on the ship, which is needed in the design of mooring system. (Nevertheless, the students were taught on the use of PARAMARINE for sea-keeping analysis). For this project, thus, sea-keeping performance of the FPSO designed was analyzed by WAMIT, which has been evolving as a standard tool for sea-keeping analysis in the offshore industry. WAMIT was run on a Linux machine in the Athena computing environment of MIT. The students could either directly or remotely access the software. In different loading, operation, and surviving conditions, this analysis tool provides results for hydrodynamic coefficients, RAOs, and RMS motions of the FPSO.
RISER-SIM: This software was used to perform the analysis of a mooring line in dynamic ocean environment. It provides a prediction of line configuration and tension distribution along the line under various loading conditions. From this analysis, students obtained the loading-excursion relation of the mooring system, which is essential information for optimizing the mooring design.
Field performance period: 20 years
Daily production: ~ 150, 000 bbls
Storage capacity: ~ 2,000,000 bbls
Offloading routine: ~ 10 days
Water depth: ~1000 meters
Operation condition: 1-year storm (wind/current/wave)
Survival condition: 100-year storm (wind/current/wave)
Operation condition (1-year return period):
Survival condition (100-year return period):
"Guide for Building and Classing Floating Production Installations." American Bureau of Shipping, 2010. (PDF - 3.1MB)
"Guide for 'Dynamic Loading Approach' for Floating Production, Storage and Offloading (FPSO) Installations." American Bureau of Shipping, 2010. (PDF)
Sections 5.1 to 5.4 of "Common Structural Rules for Double Hull Oil Tankers." American Bureau of Shipping, 2010. (PDF - 7.4MB)
International Maritime Organization. Regulation 22 from MARPOL Consolidated Edition. International Maritime Organization, 2006. ISBN: 9789280142167. (PDF - 13.0MB)
Offshore-Technology.com. "Elf exploration field – Girassol, Luanda, Angola." Accessed July 12, 2011.
Doumont, Jean-Luc. Part Four, "Effective Graphical Displays." Trees, Maps, and Theorems. Principiae, 2009. ISBN: 9789081367707. (PDF)