Principles of Weight Management and Weight Estimating Methods for the Offshore Oil Industry


David Bennett – SAWE Member – WorleyParsons   

Class Description: 

Due to the unique nature of design and construction of fixed and floating offshore oil facilities (very few of which are identical), the oil industry relies on accurate weight management to provide data to create information that is used for structural design, cost estimating and determining the most efficient means of transporting, lifting or towing a completed platform from a fabrication facility to its installation site.

Application of proven methods – based on historical weight data and experience – are employed to determine preliminary weights for offshore structures. This early data is used to calculate estimated design and fabrication costs that are part of an overall feasibility analysis to determine the commercial viability of development of an offshore oil eld. Numerous technical (severe environmental conditions, high production rates, corrosive environments, etc.) and monetary (high weight equals high cost) challenges must be overcome before an owner is comfortable with proceeding to exploit a new oilfield from discovery to production.

With floating production facilities being installed in water depths approaching 10,000 feet, it is critical to develop the correct platform type (semi-submersible, spar, FPSO (Floating Production, Storage and Offloading vessel). Weight management is one of the key tools used to determine the correct production scenario.

This training course will highlight the importance of weight management in the oil industry, present several of the methods typically used to create preliminary estimates of weight and center of gravity and walk through an example of estimating preliminary weight and CG data for a floating offshore platform.

After registration, please keep an eye out for an e-mail from the instructor. He will likely be sending out a list of reading material to review before the class.