MIT2_019S11_HydStr1

MIT2_019S11_HydStr1 - 2.019 Design of Ocean Systems Lecture...

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2.019 Design of Ocean Systems Lecture 2 February 11, 2011
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Typical Offshore Structures Platforms: – Fixed platform –F P SO – SPAR – Semi-Submersible – TLP (Tension Leg Platform) Key Components: – Platform on surface (with production facility, gas/oil storage) –R i s e r s – Mooring – Subsea system – Pipelines or transport tankers © Centre for Marine and Petroleum Technology. All rights reserved. This content isexcluded from our Creative Commons license. For more information, see http://ocw.mit.edu/fairuse .
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Semi Submersible Platform Photo courtesy of Erik Christensen , CC-BY. Tension Leg Platform (TLP) Gravity Based Platform © SBM Atlantia. All rights reserved. This content is excluded from our Creative Commons license. For more information, see http://ocw.mit.edu/fairuse . © source unknown. All rights reserved. This content is excluded from our Creative Commons license. For more information, see http://ocw.mit.edu/fairuse .
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FPSO (Floating, Production, Storage, Offloading) ± Movable ± Versatile for use in smaller reservoirs ± Relatively cheap in cost –H u l l – Mooring/riser system Topside Courtesy of Linde AG. Used with permission. © Jackson Lane Pty Ltd. All rights reserved. This content is excluded from our Creative Commons license. For more information, see http://ocw.mit.edu/fairuse .
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Design of FPSO vs. Tankers/Ships Tankers/ships: ± Storage ± Stability ± Speed ± Motion (seakeeping) ± Cost FPSO: ± Storage ± Stability ± No Speed requirement ± Motion (seakeeping) – Limited riser top-end displacement – Production – Offloading – Equipment installation ± Freeboard – Green water – Bow impact ± Mooring/risers – Drift motion – slowly-varying motion ± Reliability
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Basic Design Requirements of FPSO ± Requirement for a turret mooring to allow the FPSO to weathervane and minimize environmental loads on the mooring system ± Selection of suitable hull size and form with good motion characteristics ± Freeboard ± Production facilities design to minimize motion downtime ± Hull size to provide adequate buffer storage to minimize shuttle tanker offloading downtime ± Hull structure design (strength and fatigue) ± Human safety
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Hull Size and Form Major requirements: ± Crude oil storage ± Deck space ± Sea-Keeping performance ± Availability of tanker hulls for conversion
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MIT2_019S11_HydStr1 - 2.019 Design of Ocean Systems Lecture...

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