As part of the USD 1.5 billion SHWE field development project in the Bay of Bengal, Myanmar, Dockwise Shipping B.V. performed engineering design for transport and installation of the SHWE platform’s nearly 22,000-metric ton jacket and 30,000-metric ton topsides with deck support frame. With a center of gravity located 48.3 meters above the keel, the topsides had stability requirements that pushed the limits of the installation barge. The short, fat jacket also presented challenges.
With about 2.5 years to complete this operation, Dockwise performed numerous analyses and design iterations based on MOSES and SACS simulations. SACS’ ability to dynamically iterate designs allowed Dockwise to perform 6000 hours of advanced analysis, comply with offshore design criteria, and visualize complex results. Design work was spread across offices in The Netherlands, United States, and China, so drawings were produced in MicroStation, and files were managed in ProjectWise to ensure data access, accuracy, and traceability.
The successful field operation echoed the sound engineering for the T&I design. SACS, MOSES, and MicroStation helped the engineering and design group to be more efficient and, therefore, facilitated the operation. MOSES and SACS saved 5,000 man-hours and two operation days during project execution, which reduced the project cost significantly. MOSES’ accurate time-window prediction reduced the risk that the float-over operation would be delayed. The planned four-day operation took just two days.
Bentley technology improved efficiency and accuracy throughout the project. The topsides float-over analysis was an incredibly complex process that required significant data transfers between SACS and MOSES. Structural information calculated in the SACS model was passed to MOSES, which calculated time-history, hydrodynamic-related information for every minute of the installation and float over operation. Results from MOSES were fed back to SACS to make sure that the structure was adequate for all of the load conditions during the different float-over stages.