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FLNG for Cost Effective, Reliable Offshore Operations

R M Shivers – LoneStar FLNG

FLNG Popular Talking Points

• Liquefaction Process

• LNG Offloading

• Cargo Containment System

• BAHX vs SWHE

• Gas Turbine Selection

Floating LNG 2015 London, Feb 2015

FLNG Popular Talking Points

• Liquefaction Process

• LNG Offloading

• Cargo Containment System

• BAHX vs SWHE

• Gas Turbine Selection

“Integrated” FLNG Vessel


WellsProduction

Process

Gas

TreatmentLiquefaction Storage Offloading Shipping

Ma

rke

t

“Integrated” Process/Liquefaction Vessel

- many functions on single vessel (not an FPSO)

- unwieldy size, limited construction sites

- drive cost higher and increases “riskex”

- unsatisfactory solutions for LNG transfer offshore

Typical FLNG Configuration: Integrated FLNG Vessel


FLNG: The Real Questions

• Cost Effective Drilling/Completion/Workover?

• Exposure to Cyclonic Storms?

• Ensuring Safe/Reliable LNG Offloading

• Generic Design/Residual Value for Relocation

• Project Execution Factors (Cost/Schedule Risk)


Wells Production

Process

Gas


FLNG

VesselProduction

Vessel

LNG Shuttle

Tanker

Site Specific Generic Generic

Re

se

rvo

ir

Ma

rke

t

Wells Production

Process

Gas

Treatment Liquefaction Storage Offloading Shipping

Ma

rke

t

Re

se

rvo

ir

Flexibles

/Buoy

Production

Vessel

Liquefaction/Shuttle

Tanker

Site Specific Generic

Flexibles

& Turret

Split FLNG Configuration: Segregate Production & Liquefaction


Process/Gas Treat FPSO: 2 x 300 MMSCFPD; 4 MTA LNG


Select WHP/Production/Treating Platforms for Site Conditions

FPSO/Subsea Wells


FPSO/Subsea Wells

Shallow Water

Dry Tree

Floating LNG 2015


London, Feb 2015

FPSO/Subsea Wells

Shallow Water

Dry Tree

Harsh

Environment

Floating LNG 2015


London, Feb 2015

Wells Production

Process

Gas


FLNG

VesselProduction

Vessel

LNG Shuttle

Tanker

Site Specific Generic Generic

Re

se

rvo

ir

Ma

rke

t

Wells Production

Process

Gas

Treatment LiquefactionStorage Offloading Shipping

Ma

rke

t

Re

se

rvo

ir

Flexibles

/Buoy

Production

VesselLiquefaction/Shuttle

Tanker

Site Specific Generic

Flexibles

& Turret

Split FLNG Configuration: Segregate Production & Liquefaction


Liquefaction/Storage/Shuttling Vessel

155,000 M3 x 2 MTA Capacity

Standard Moss LNG Carrier

Dual Fuel Diesel Electric Drive

Floating LNG 2015London, Feb 2015

Bow Extension Piece Assembly: VFD & Switchgear


Bow Extension Piece & Liquefaction Module


Liquefaction/Storage/Shuttling Vessel

155,000 M3 x 2 MTA Capacity


N2 Dual Exp Liquefaction: Unit Power (KW-hr/Tonne)

0

50

100

150

200

250

300

350

400

450

500

Base Case >N2 Press Pre-cool Gas,< N2 Temp

Revised Pre-cool

OptimizedCase

SMR DMR


Large Scale Dual N2 Expansion Plants

Floating LNG 2015

0

500

1000

1500

2000

2500

3000

3500

4000

4500

ASU Reference List – 1992 - 2013

Tonnes/day LOX

London, Feb 2015

Liquefaction Process – Driver Efficiency

Fuel Gas Consumption = (KW-hr/tonne) / Engine Efficiency

Steam Gas Duel Fuel Diesel Engine

Turbine Turbine Standard w/WHRU

Prime Mover 49% 52.5%

Alternator/Switchgear 2.2% 2.2%

Transformers/VFD 3.0% 3.0%

Drive Motor 5.4% 5.4%

Net Efficiency 30% 38% 44% 47%


Comparison w/Mixed Refrigerants – Fuel Gas Consumption

0.0%

1.0%

2.0%

3.0%

4.0%

5.0%

6.0%

Optimized N2 - DFDE SMR - Gas Turbine DMR - Gas Turbine


HOFIM Compressor: Footprint & Weight Reduction

Gas turbine

CompressorCompressor w/VFD

MOPICO® / HOFIM™

+ No lube oil system

+ No shaft seals, no seal system

+ Reduced footprint / smaller motor

+ No gearbox


18 MW Dual Fuel Engines & Engine Room Layout


• Vessel is Classed as Ship

• Vessel is Flagged as Ship

• Vessel is Crewed like Ship

• Vessel Periodically Dry Docks per Ship

• Vessel Planned Maintenance in Dry Dock

• Precedents: Oil Shuttle Tankers, EBRV Ships

Liquefaction Vessel is Ship, not Production Vessel


Operational Sequence


Transfer Jetty in Sheltered Water

Transfer Jetty

Transfer Jetty Located in Sheltered Water

Local “Footprint” for tugs/harbor

Enables Local Power Generation


• FLNG Solutions must consider Drilling & Production Operations.

• Side-By-Side offloading incongruous with Currently Accepted Offshore Industry Practice

• Size & Complexity of Integrated FLNG systems add significant Riskex

• Dry Gas Expander Liquefaction offers layout/safety advantages

• Optimized N2 Process offers similar fuel efficiency to MR processes

• De-integration of FLNG System advantageous for Cost, Schedule, Project Execution, Operability and Redeployment

Thoughts & Observations


Utilize Standard, Generic Liquefaction Vessel: 1- 2 MTA per Vessel


Producton/Treating Platform per Site Specific Factors

Utilize Standard, Generic Liquefaction Vessel


E Canada

GoM Offshore

SW Africa W Australia

Barents Sea

FLNG Moderate – Harsh Environments


FLNG Units Costs

4 MTA

3 x 2 MTA Newbuild Ships

~$900/TPA

2 MTA

3 x 1 MTA Converted Ships

~$1000/TPA

1 MTA

Benign Metocean

Environment

~$1000/TPA

4 MTA

Grand Banks

Environment

~$1200/TPA


FLNG 2014

TLP FLNG Unit Cost & Impact of Tandem Offloading

6 MTA

3 TLPs

6 X 2 MTA Liq Vessels

1 FSU

~$1400/TPA

6 MTA

3 TLPs

3 X 2 MTA Liq Vessels

Tandem Loading

3 x DP Shuttles

1 FSU

~$1250/TPA

Liquefaction Shuttle

Vessels Tankers

London, Feb 2015

• Well Costs & Operations- Choose fixed vs. Floating production host as required

• Liquefaction System- Optimized Dual N2 Expansion: Safe, Compact, Lightweight, Efficient

• LNG Offloading- No side by side or tandem offloading; LNG transfer in sheltered water

• Generic Design/Residual Value- Field Specific factors only affect FPSO; Liquefaction vessels are generic

• Project Execution Factors- Standard Hulls; multiple shipyards. - Modular Topsides; multiple parallel construction

Addressing the Real Concerns


r m shivers lonestar flng - smi online · r m shivers –lonestar flng. flng ... gas treatment...

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