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Rational Design of FPSO Hulls

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Alexandre Duran, Naval Architect, Nautilus Marine Consultants talks about the advances in newbuild FPSO hull design

Alexandre Duran, Naval Architect, Nautilus Marine Consultants talks about the advances in newbuild FPSO hull design

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  • 1. RATIONAL DESIGN OF FPSO HULLSAdvances in new-build FPSO hull design Alexandre DURAN NAUTILUS MARINE CONSULTANTS PTE. LTD. 20 Cecil Street, #14-01, Equity Plaza, Singapore 049705Singapore, 28 September 2010
  • 2. Introduction2 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 3. SHIP-SHAPED OFFSHORE UNITS F FLOATING P PRODUCTION S STORAGE O OFFLOADING OPERATIONS Rational design of FPSO Hulls3 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 4. MODERN FPSO HULL CONCEPTS NEW BUILD HULL DESIGN PARAMETERS The RATIONAL FPSO Hull Concept FUNCTIONAL FLOATER PRODUCTION REQUIREMENTS STORAGE OPTIMIZATION OPERATIONAL CHARATERISTICS4 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 5. Floater Concept5 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 6. SPECIFIC HULL LINES Functional hull design for an FPSO: Balanced hull shape minimal TPC variation between min and max drafts Smaller volumes Fore and Aft effectively reduce bare hull weight Reduced Fore and Aft volumes act to minimize Still Water Bending Moments Aft end is specifically shaped for optimal on-site environment directionality6 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 7. BALANCED FLOATER Hydrostatic Stability Longitudinal Evolution of LCF vs. LCB center of for trim = 1% (by the bow) buoyancy 173.00 Longitudinal center of LCF waterliner 172.50 LCB 172.00 171.50 Center (m) 171.00 170.50 170.00 169.50 169.00 15.000 16.000 17.000 18.000 19.000 20.000 21.000 22.000 23.000 24.000 25.000 Draft (m)7 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 8. Production Requirements8 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 9. HULL PROCESS TANKS Include Process Functions in the Hull9 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 10. PRODUCTION CHEMICALS Self-Supporting Tanks Inside Hull Stainless Steel Non-Structural Flush Interior Segregated10 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 11. Storage Optimization11 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 12. HULL VOLUME UTILIZATION Optimizing Hull Volumetric Parameters: Minimum water Ballasting Only FWD and AFT ballast tanks for static balancing of FPSO Process Deck “Oil Ballasting” Philosophy 2M bbls storage CO quasi-static balancing between loading and offloading sequences “Parcel” storage capacity Full load for an FPSO ≠ Full load for a Tanker “Dry Belt” Concept Cargo Hold Zone is free of ballast tanks12 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 13. CARGO CAPACITY Offloading philosophy Dictates Storage Requirements Typical example for a 2Mbbl Storage Capacity FPSO Minimum volume needed: 1,732,000 bbl 82 h 28 h 114 h 4h13 11 Annual FPSO Congress, Singapore, 28 September, 2010 th A.DURAN
  • 14. Operational Characteristics14 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 15. “OIL BALLASTING” PHILOSOPHY “Dry Belt” benefits Reduced ballast deadweight = More cargo capacity Void spaces only Corrosion resistance Dry belt15 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 16. CORROSION ISSUES Problem: Corrosion in Ballast tanks BHD next to Cargo Tanks Reason: Higher temperature in Corrosion witnessed after 5 years on new build FPSO seawater environment stimulates corrosive attack by increasing the rate of electrochemical reactions and diffusion processes16 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 17. Corrosion Solutions “Dry Belt” Solution No ballast = non-corrosive environment in void spaces Wing tank is protected Wing tank is highly against corrosion susceptible to corrosion high temperature gradient at BHD17 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 18. Other Innovations18 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 19. MOORING DESIGN Mooring pattern of FPSO is fixed19 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 20. SIMPLIFIED DESIGN Design innovations Rational Functional Simplified Example: Mooring Fairleads20 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 21. FUNCTIONAL DESIGN Multi-purpose riser porch May be used for: Pulling OOL Pulling Risers Pulling Umbilicals Material Handling Hydrate Remediation21 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 22. RATIONAL DESIGN Multi-function riser porch22 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 23. PRACTICAL DESIGN On-board Coiled Tubing Intervention23 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 24. Conclusion24 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 25. RE-SHAPED OFFSHORE UNITS F FLOATING P PRODUCTION S STORAGE O OPERATIONS Rational design of FPSO Hulls25 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 26. Future Challenges26 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 27. DESIGN FOR THE FUTURE Rational Design of / for: Hull Shape / Size Constructability More Stringent Specifications Safety Technical Challenges Ecology / Carbon Footprint Deeper Waters Economy Harsh Environments Operational Efficiency New Technology Fast Track Projects Operational Requirements Scale of Projects Etc.27 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 28. Thanks28 - 11th Annual FPSO Congress, Singapore, 28 September, 2010 A.DURAN
  • 29. Questions?Alexandre DURAN NAUTILUS MARINE CONSULTANTS PTE. LTD. 20 Cecil Street, #14-01, Equity Plaza, Singapore 049705 duranalex@live.com +65 9115 1830Singapore, 28 September 2010