PFLNG Dua

Image Source : JGC Corporation Projects – PFLNG2 Project

Location : Rotan Field, Offshore Sabah

Floating LNG Plants serve to profitably marry the undeveloped, scattered or remote small to medium sized gas fields, to the increasing and unquenched energy demands in developing countries. PFLNG Satu, the world’s first operational FLNG, pioneered the cause of assembling an extraordinarily large amount of liquefaction equipment, which would normally spread over 2.5 square kilometre, on to a very limited floor area – 360 metre long and 40 metre wide. The 1.2 MMPTA FLNG plant is acclaimed as an industry game changer, which would set the stage for future generations of FLNGs.

In 2011-12, a dual FEED process was initiated by Petronas to construct a second FLNG plant. The final investment decision (FID) for the project was achieved in February 2014 and the EPC contract was awarded to a consortium of JGC Corporation and Samsung Heavy Industry. The PFLNG 2 facility is designed to liquefy, produce and offload 1.5 MMTPA of LNG for 20 years without the need for drydocking. The non-propelled FLNG is capable of operating in water-depths between 1,640 feet (500 meters) to 4,921 feet (1,500 meters).

The plant will implement Air Products (APCI) proprietary AP-N^TM LNG process technology and employ GE Oil & Gas’ four PGT25+G4 gas turbine generator systems and two nitrogen trains incorporating two LM6000-PF+ 2BCL907 aeroderivative gas turbines in mechanical-drive mode. In May 2015, fabrication commenced at the SHI Shipyard in Geoje Island, South Korea, using a modular approach of pre-assembling equipment on land in block form, and then integrating them on-board. Within a year, the 1,289 foot (393 meter) long hull was launched and integration works began in July 2016.

The vessel, will be moored at the Rotan gas field, 130 km off Sabah, within the South China Sea, using an external turret and will have a collective weight of 152,000 tonne. Initially the floating unit was planned to be commissioned in 2018, however delays on account of financial constraints have pushed the anticipated maiden production to 2020.

OWNERSHIP (Equity %)

Murphy Oil	80.00%
PETRONAS	20.00%

General Data

Estimated Capital Cost (USD)	1.7 B per Train
Plant Type	FLNG
Plant Stage	Construction
Final Investment Decision (FID) Year	2014
FEED Contractor	JGC Corporation Samsung Heavy Industries MODEC IHI (formerly, Ishikawajima-Harima Heavy Industries) CB&I Nederland Toyo Engineering
EPC Contractor	JGC Corporation Samsung Heavy Industries
No. of Trains / capacity	NA / 1.5 MMTPA
Production Start Year	2020
Products	LNG
Gas Type	Non-associated Gas (NAG)

Technical Data

coming soon…

Refrigeration Train Configuration

coming soon…

Key Facts

PFLNG Dua’s hull was launched in May 2016. The structure is 393 m long, 64 m wide and 31 m deep with a total dry weight of 152,000 tonnes. It can operate in water depths ranging from 500 m to 1500 m and can accommodate 100-150 personnel.^1,2
In 2012, PETRONAS conducted dual-FEED using two consortia. The first consortium included MODEC, IHI, CB&I Nederland and Toyo Engineering while the second comprised of JGC Corporation and Samsung Heavy Industries (SHI). The FEED included the basic design of natural gas liquefaction system utilizing pre-cooling system, purpose designed hull, living quarters, mooring system, LNG storage tank and LNG offloading system, followed by an EPCIC (Engineering, Procurement, Construction, Installation and Commissioning) cost estimate for the Project. Subsequently, the EPCIC contract was awarded to JGC and SHI consortium on February 2014.^3,4,5
PFLNG Dua is designed to be moored in the offshore field using an external turret and mooring system. The vessel will employ SOFEC’s DNV-classed external mooring system, which will consist of a twelve leg (3×4) mooring system.⁶
NGLTech, in collaboration with Petronas, developed the proprietary Sep-iSYS™ Inlet Separation System for the project. The system is capable of handling large slug volumes and sand with minimal pressure drop and removes sand particles as tiny as 100 micron. Sep-iSYS™ technology saves up to 50% weight, space and cost over conventional separators and is a compact and self-regulating system with minimized control and instrumentation.⁷
PFLNG Dua employs APCI’s proprietary AP-N™ LNG process technology. The AP-N™ LNG process is the most efficient of all nitrogen recycle LNG processes in the industry and is ideally suited for small scale FLNG applications.⁸
Heatric, a subsidiary of Meggitt, was awarded the contract to supply printed circuit heat exchangers (PCHEs) to be installed on the topsides of PFLNG Dua. PCHEs weigh up to 85% less than conventional technology. The high integrity, seamless weld and joint-free structure makes PCHEs less susceptible to vibrations and failure. In addition, they are highly resistant to fire and require minimal over-pressure relief systems.⁹
PGLNG Dua contracted GE Oil & Gas to supply four PGT25 + G4 gas turbine generator systems and two nitrogen trains featuring two LM6000-PF + 2BCL907 aeroderivative gas turbines in mechanical-drive mode. PFLNG Dua will be the first FLNG to employ LM6000 Gas Turbines.¹⁰
Lack of financial resources and low oil-price environment prompted PETRONAS to temporarily suspend the development of PFLNG Dua and renegotiate EPC contracts with JGC & SHI. Originally the plant was expected to be operational in 2018, however, the project has subsequently been re-phased and is now expected be ready in 2020. As of March 2018, construction of PFLNG Dua is reportedly 84% complete.^11,12,13,14