The PETRONAS Floating LNG concept was envisaged to monetize stranded gas resources as part of the effort to turn Malaysia's 2% hydrocarbon depletion rate into 3% growth. The two floaters for offshore Sarawak and Sabah will increase the country's LNG production capacity by 8% (2.5 MTPA). The fast track nature of the project present a challenge to both the Gas and upstream Business in meeting the target date. Extensive technology selection exercises we conducted in finalizing the turret and mooring,, gas treating, liquefaction, LNG cargo containment and LNG offloading systems. Designers and licensors have done rigorous design optimization and marinization studies on impact of floater motion and evaluated against an extensive criteria:

  • Proven and established onshore and offshore track records as well as experience or involvement in the delivery of LNG plants

  • Design robustness and efficiency

  • Operating envelop and flexibility

  • Inherent safe design

Main challenge includes optimizing the flexibility of the process to accept the widest range of known and anticipated feed gas quality. Technology and equipment selection for the topside processes required extensive investigation into vendors' readiness to design and supply natural gas receiving, treating, liquefying and LNG storage and offloading equipment for first time utilization in the open sea environment. Processes and equipment design have taken into consideration the design motion envelope, calculated blast loads, acceleration and sloshing effects while keeping within the topsides weight, footprint, environment and regulatory constraints. The nitrogen cycle liquefaction process presented a unique challenge in commissioning attributed to logistics requirement and the extreme complexity of the process and machinery controls.

Success in managing the complexity of the facilities design and construction within the extreme constraints of technology and constructability will be the ultimate triumph for the PETRONAS Floating LNG Project to become a benchmark and model for similar scale Floating LNG projects.

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