benefits of cylindrical fpos

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Benefits of cylindrical floating petroleum offshore platforms.

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  • 1

    Benefits of a cylindrically shaped floater for an FPSO application in cyclone exposed environments

    Presentation by: Fredrik Major, CBDO, Sevan Marine ASA

    for INTSOK DEEP WATER CONFERENCE

    Thursday 14 November 2013, Parmelia Hilton Hotel I Perth, Australia

  • 2

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 3

    Worlds Growing Fleet of Cylindrical Floaters:

  • 4

    FPSO Piranema Spirit (ex Sevan Piranema)

    In operation since October 2007

    Field operator: Petrobras

    Contract type: Build own and operate

    FPSO operator: Teekay Petrojarl

    Yard: Yantai Raffles/Keppel Verolme

    Location: Offshore Aracaju, Brasil

    Water depth: 1000m

    Oil processing: 30 000 bod

    Gas processing/injection: 3.6 mill Sm3/day-130 mill scfd @

    280 bar

    4

  • 5

    FPSO Hummingbird Spirit (ex Sevan Hummingbird)

    In production since September 2008 at

    Centrica Operated Chestnut field

    UK CNS

    Field operator: Centrica

    Contract type: Build own and operate

    FPSO operator: Teekay Petrojarl

    Yard: Yantai Raffles/Keppel Verolme

    Location: UK Central North Sea

    Water depth: 120m

    Hull size: Sevan300

    Oil processing: 20 000 bod

    Water injection: 20 000 bwd

    Liquid combined: 30 000 bld

    Redeployment options currently evaluated

    5

  • 6

    FPSO Sevan Voyageur at the Premier Oil Shelley field In operation from August 2009 July 2010

    Field operator: Premier Oil

    Contract type: Build own and operate

    FPSO operator: Sevan Marine

    Yard: Yantai Raffles/Keppel Verolme

    Location: UK Central North Sea

    Water depth: 95m

    Hull size: Sevan300

    Oil processing: 20 000 bod

    Water injection: 20 000 bwd

    Liquid combined: 30 000 bld

    Power feed to two ESPs 2*800kW

    Re-deployed to E.ON operated Huntington field

    (Premier Oil 40% partner)

    6

  • 7

    FPSO Voyageur Spirit First redeployment (ex Sevan Voyageur producing the Premier Oil operated Shelley field)

    In operation at the EoN operated Huntington field since March 2013

    Field operator: EoN Ruhrgas

    Contract type: Lease and operate

    FPSO operator: Teekay Petrojarl

    Conversion Yard: Nymo

    Location: UK Central North Sea

    Water depth: 89m

    Hull size: Sevan300

    Oil processing: 30 000 bod (20) Water injection: 48 000 bwd (20) Liquid combined: 60 000 bld (30) Gas Compression 38 mmscfd (none)

  • 8

    FPSO Sevan 1000 for the ENI operated Goliat field Contract type: Technology license

    Location: Norwegian Barents Sea

    Water depth: 400m (Harsh and sub-arctic)

    Yard: Hyundai Heavy Industries

    Hull size: Sevan1000

    Oil processing: 100 000 bod

    Water injection: 125 000 bwd

    Gas compression: 140 Mill Scfd

    Oil storage: 1 000 000 bbls

    Power feed from shore 60 MW

    8

  • 9

    Hull construction

  • 10

    Sevan 1000 for Goliat - HHI November, 2013

  • 11

    Sevan 400 for Dana Petroleum Western Isles Development Sevan 400 for Dana Petroleum Operated Western Isles Fields Contract type: Technology license

    Location: UK Northern North Sea

    Water depth: 165m

    Yard: COSCO Qidong Yard

    Hull size: Sevan 400

    Oil processing: 40 000 bod

    Gas processing: 40 mmscfd

    Oil storage: 400 000 bbls

  • 12

    Sevan 400 for Dana Petroleum Western Isles Development Sevan 400 for Dana Petroleum Operated Western Isles Fields Construction at COSCO Qidong November 2013

  • 13

    Sevan Drillers (owner/ operator Sevan Drilling) DP based MODU for Ultra deep water drilling

    Carrying capacity of the drillship, motion as a semisubmersible

    Yard: COSCO, China

    Sevan Driller - Contracted by Petrobras

    Sevan Brasil - Contracted by Petrobras

    Sevan Louisianna Contracted by LLOG Bluewater Sevan Driller No:4

    13

  • 14

    Sevan 300 No:4 and 5 COSCO Nantong, Completion to accommodation units

    First unit contracted by Petrobras

  • 15

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 16

    Geo-stationary hull Main benefits

    Hull facing environment with same shape in all directions no need to rotate, even in the harshest environmental conditions

    Axio-symetric hull no weathervaning -> Eliminating turret and swivel Tolerant for weather spreading (waves/ wind/ current from different directions)

    Capex savings: Cost of turret /swivel as well as thrusters avoided

    Opex savings: Reducing requirement for marine crew and fuel consumption

    Increased flexibility:Spare capacity for tie ins simply by spare riser guide tubes

    Power transfer: Facilitates high electric power transfer

    WAVESs

    Sevan

  • 17

    Insignificant bending stresses due to global loads on the hull

    Eliminating typical wave induced fatigue loads

    Minimal hull deflections (sag/ hog) simplifying topside design

  • 18

    Favourable Motions compared to shipshaped FSU/ FPSO

  • 19

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 20

    Sevan Hummingbird Full scale motion recording program

  • 21

    Design wave conditions for cylindrical FPSOs in operation/

    under construction

  • 22

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 23

  • 24

    Permanent mooring in Cyclone exposed areas JIP including model tests with Sevan Platforms

    Demonstrated feasibility of safe permanent

    mooring through cyclone condition

    Significant increase in production uptime

    based on avoiding disconnection

    Mooring in fixed orientation eliminates

    problem with rapid change of wind

    direction forcing a shipshaped FPSO to

    get waves beam on and excessive roll

  • 25

    Tuning of hull shape for motion optimisation

  • 26

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 27

    FPU/FPSO for SCR

  • 28 28

    ENABLING SCRs FOR HARSH ENVIRONMENT FPSOs Sevan Hull Tuned for Optimized Motion Pattern

    Steel Catenary Risers (SCRs) features:

    - Lower cost

    - Higher and more predictable durability

    - Higher capacity for top tension,

    temperature and pressure

    - More flexibility for corrosion protection

    and thermal insulation

  • 29

    SCR Termination

    SCR

    TDZ

    12 deg.

    SCR Weigth coating

    SCR hang-off

    deck at el.18m Umbilical entry in

    guide tubes .

    Umbilical

    termination/hang-

    off at el. 46m

  • 30

    Contents

    Introduction and projects

    Features of the cylindrical hull

    Operational experience

    Permanent mooring in Cyclonic Conditions

    FPSO with SCRs in harsh deep environments

    FLNG application

  • 31

    SEVAN FLNG

  • 32

    Sevan FLNG Concept

    Tank Arrangement and Capacity

    LNG storage (6 tanks): 180 000 m3

    LNG/ LPG storage (1 tank): 30 000 m3

    Condensate storage (6 tanks): 28 000 m3

    Ballast tanks (24 tanks): 80 000 m3

    LPG/LNG Tank

    LNG Tanks

    Condensate Tanks

    Ballast Tanks

    LNG production capacity with two trains

    Up to 2,4 mmTPA

  • 33

    SEVAN FLNG Main Dimensions

    Based on Sevan Cylindrcal Hull

    Hull diameter: 106 m

    Main deck diameter: 120 m

    Process deck diameter: 130 m

    Main deck elevation: 37 m

    Process deck elevation: 58 m

    Operating Draft: ~20 -22 m

    Process deck area: ~13 000 m2

    Utility deck area: ~5 000 m2

    Main deck area: ~4 300 m2

    Process deck

    Utility deck

    Main deck

    Double bottom

  • 34

    SEVAN FLNG Main Dimensions

  • 35

    Sevan FLNG - Process Deck Arrangement

  • 36

    Cooling seawater Intake

    Large cooling water requirement typical for 2.4 MTPA 18 000 m3/h

    Seawater intake from cold deepwater

    Stationary unit-> no interference with mooring and risers

    -> no swivel for cooling water required

    36

  • 37

    LNG Offloading systems

    Side-by-side Offloading

    Sea states Hs = 2.0 / 2.5 m

    Tandem Offloading

    Sea states Hs = 3.5 / 4.5 m

    Offset

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