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 1
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 2
World s Growing Fleet of Cylindrical Floaters: 3
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 Sm 3 /day-130 mill scfd @ 280 bar 4
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: Water injection: Liquid combined: 20 000 bod 20 000 bwd 30 000 bld Redeployment options currently evaluated 5
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: Water injection: Liquid combined: Power feed to two ESPs 20 000 bod 20 000 bwd 30 000 bld 2*800kW Re-deployed to E.ON operated Huntington field (Premier Oil 40% partner) 6
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) 7
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
Hull construction 9
Sevan 1000 for Goliat - HHI November, 2013 10
Sevan 400 for Dana Petroleum Operated Western Western Isles Development 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 11
Sevan 400 for Dana Petroleum Western Isles Development Sevan 400 for Dana Petroleum Operated Western Isles Fields Construction at COSCO Qidong November 2013 12
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
Sevan 300 No:4 and 5 COSCO Nantong, Completion to accommodation units First unit contracted by Petrobras 14
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 15
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 16
Insignificant bending stresses due to global loads on the hull Eliminating typical wave induced fatigue loads Minimal hull deflections (sag/ hog) simplifying topside design 17
Favourable Motions compared to shipshaped FSU/ FPSO 18
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 19
Sevan Hummingbird Full scale motion recording program 20
Design wave conditions for cylindrical FPSOs in operation/ under construction 21
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 22
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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 24
Tuning of hull shape for motion optimisation 25
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 26
FPU/FPSO for SCR 27
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 28 28
SCR Termination 12 deg. Umbilical termination/hangoff at el. 46m SCR hang-off deck at el.18m Umbilical entry in guide tubes. SCR SCR Weigth coating TDZ 29
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 30
SEVAN FLNG 31
Sevan FLNG Concept Tank Arrangement and Capacity LNG storage (6 tanks): 180 000 m 3 LNG/ LPG storage (1 tank): 30 000 m 3 Condensate storage (6 tanks): 28 000 m 3 Ballast tanks (24 tanks): 80 000 m 3 LPG/LNG Tank LNG Tanks Condensate Tanks LNG production capacity with two trains Up to 2,4 mmtpa Ballast Tanks 32
SEVAN FLNG Main Dimensions Based on Sevan Cylindrcal Hull Hull diameter: Main deck diameter: Process deck diameter: Main deck elevation: Process deck elevation: Operating Draft: 106 m 120 m 130 m 37 m 58 m ~20-22 m Process deck Utility deck Main deck Process deck area: ~13 000 m 2 Utility deck area: ~5 000 m 2 Main deck area: ~4 300 m 2 Double bottom 33
SEVAN FLNG Main Dimensions 34
Sevan FLNG - Process Deck Arrangement 35
Cooling seawater Intake Large cooling water requirement typical for 2.4 MTPA 18 000 m 3 /h Seawater intake from cold deepwater Stationary unit-> no interference with mooring and risers -> no swivel for cooling water required 36 36
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 37
LNG Offloading systems Offset Side-By-Side offloading to conventional LNG carriers based on loading arms 38
LNG Offloading systems Conventional LNG carrier moored to a DP based HiLoad unit 39
«We make the (floater) world go round» 40