sevan company presentation - norwepmajor.pdf1 benefits of a cylindrically shaped floater for an fpso...
TRANSCRIPT
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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
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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
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World’s Growing Fleet of Cylindrical Floaters:
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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
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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
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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)
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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)
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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
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Hull construction
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Sevan 1000 for Goliat - HHI November, 2013
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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
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Sevan 400 for Dana Petroleum – Western Isles Development Sevan 400 for Dana Petroleum Operated Western Isles Fields Construction at COSCO Qidong November 2013
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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
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Sevan 300 No:4 and 5 COSCO Nantong, Completion to accommodation units
First unit contracted by Petrobras
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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
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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
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Insignificant bending stresses due to global loads on the hull
• Eliminating typical wave induced fatigue loads
• Minimal hull deflections (sag/ hog) simplifying topside design
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Favourable Motions compared to shipshaped FSU/ FPSO
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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
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Sevan Hummingbird – Full scale motion recording program
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Design wave conditions for cylindrical FPSOs in operation/
under construction
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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
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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
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Tuning of hull shape for motion optimisation
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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
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FPU/FPSO for SCR
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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
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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
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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
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SEVAN FLNG
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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
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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
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SEVAN FLNG Main Dimensions
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Sevan FLNG - Process Deck Arrangement
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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
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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 Side-by-side Offloading
Sea states Hs = 2.5 / 3.5 m
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LNG Offloading systems Offset Side-By-Side offloading to conventional LNG carriers based on loading arms
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LNG Offloading systems Conventional LNG carrier moored to a DP based HiLoad unit
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«We make the (floater) world go round»