Dynamic simulation model aids Mensa development

For its record-setting Mensa gas field development in the US Gulf of Mexico, Shell Deepwater Development Inc., New Orleans, developed a dynamic simulation model for deepwater production and subsea tiebacks that revealed several transient conditions not readily apparent from earlier work or development tools. Changes to the start-up plan and normal operating guidelines resulted. The model was also used to train operating personnel in the dynamic response of the system, which is significantly different from conventional offshore systems. Shell further developed a data-collection plan to compare actual and predicted operating conditions. Results and recommendation for future developments are presented here. The Mensa project set world records for water depth and pipeline length.