Client: |
SAIWOO |
Operator/End User: |
Exxon Mobil Canada Property (EMCP) |
Date: |
October 2004 - April 2006 |
Project Description : |
Structural Assessment of Topsides and Jacket |
Location : |
Nova Scotia (Offshore Sable Island) |
Services Provided : |
Structural Analysis |
Detailed Description :
Background
The Thebaud field is one of six fields that make up the Sable Offshore Energy Project (SOEP). All six fields are located around Sable Island, located approximately 200km off the coast of Nova Scotia.
Extensive modification work was required at the existing Thebaud Process Platform to prepare for the installation and integration of the new Compression Platform facilities. Additionally new more onerous design acceptance and environmental criteria were to be adopted. Re-analysis of the jacket and topsides was carried out to evaluate the structural performance of the deck, jacket and piles and to allow the platform to continue operation in the new configuration.
Thebaud Platform Prior to Compression Platform Modifications.
Scope of Work
The ode Scope of Work was the analysis of the Thebaud Process Platform to take account of;
- the modifications made since its installation
- the revision of the environmental conditions that account for the recent 41 year AES40 hindcast (sponsored by the Canadian government)
- new anticipated loads for installation of the new compression platform
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ode with SAIPEM UK as a subcontractor have carried out a full suit of structural analyses for the existing Thebaud Platform with work indicating that the platform was capable of accepting the new loading. A substantial amount of work was put into assessing the relative effects of the physical changes to the platform and environment and changes between the current design methodology and that used for the original design of the platform. Follow on work provided assistance to EMCP with the presentation of the analysis findings to the Certifying Body.
Analyses were carried out using SACS, and ANSYS as appropriate. Analyses included:
- Topsides Inplace
- Topsides Seismic
- Jacket Inplace
- Jacket Seismic
- Jacket Spectral Fatigue
- Boat Impact
Work was carried out in London with weekly teleconference progress meetings and other technical meeting as required.
The use of electronic messaging allowed this project to be completed with input from Client personnel located in Halifax Canada and Houston USA, with a minimum requirement for physical meetings.
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