Design of a Floating Production, Storage, and Offloading (FPSO) System and Oil Offtake System For Offshore West Africa

...................................................................................................................... 9 ACKNOWLEDGMENTS .............................................................................................. 10 INTRODUCTION........................................................................................................... 11 TEAM ORGANIZATION.................................................................................................... 12 Team Guidelines ....................................................................................................... 13 Schedule .................................................................................................................... 13 FIELD TRIP ..................................................................................................................... 15 COMPETENCY AREAS ............................................................................................... 15 REGULATORY COMPLIANCE........................................................................................... 15 GENERAL ARRANGEMENT AND OVERALL HULL/SYSTEM DESIGN................................. 17 Ship Shape Option..................................................................................................... 18 Square Shape Option ................................................................................................ 22 WEIGHT, BUOYANCY AND STABILITY............................................................................ 25 Stability ..................................................................................................................... 27 GLOBAL LOADING ......................................................................................................... 34 Environmental Loads due to Wind, Wave, and Current ........................................... 34 Option One: Traditional FPSO ................................................................................ 34 Option Two: Square-shaped FPSO .......................................................................... 40 WIND AND CURRENT LOADING...................................................................................... 46 MOORING/STATION KEEPING......................................................................................... 46 Hardware .................................................................................................................. 47 Mooring System Analysis.......................................................................................... 49 Mooring System Optimization................................................................................... 49 HYDRODYNAMICS OF MOTION AND LOADING ............................................................... 50 Natural Periods......................................................................................................... 50 Pitch, Roll and Heave at Full Capacity: 16m draft .................................................. 52 Pitch, Roll and Heave at 30% Capacity: 10m draft ................................................. 55 Response Amplitude Operators................................................................................. 58 COST.............................................................................................................................. 60 OFFLOADING SYSTEM.............................................................................................. 65 SUMMARY AND CONCLUSIONS ............................................................................. 67 REFERENCES................................................................................................................ 69 APPENDIX A: STABCAD I/O...................................................................................... 70 APPENDIX B: MIMOSA I/O...................................................................................... 131