Services
Floating Liquefaction
FLSO (Floating Liquefaction Storage and Offloading) vessels convert natural gas to LNG at source — monetising offshore or onshore reserves that are stranded or too small for a land-based liquefaction plant. GLSB supports feasibility, technology selection, and commercial structuring for FLSO development.
Rationale
Monetising Stranded Gas
Onshore LNG liquefaction plants require multi-billion dollar capital commitments and long development timelines — putting them out of reach for smaller reserves or remote locations without pipeline infrastructure. An FLSO addresses this by deploying modular liquefaction capacity directly to the gas source, whether offshore or in a remote coastal location.
Produced LNG is stored onboard and offloaded to shuttle tankers for delivery to import markets. The vessel can be redeployed if the field economics change or the reserve is exhausted — offering a flexibility that onshore infrastructure cannot.
Technology
Liquefaction Technology Selection
The choice of liquefaction cycle affects capital cost, efficiency, footprint, and operational complexity. GLSB supports technology selection and independent comparison for FLSO projects.
Single mixed refrigerant cycle — compact footprint, lower capital cost, reduced mechanical complexity. Widely used on smaller FLSO applications where installation footprint is constrained.
Mixed refrigerant cycle offering improved efficiency over PRICO at similar complexity. Suitable for mid-scale FLSO capacity with moderate feedgas richness variation.
Three separate pure-component refrigerant cycles — propane, ethylene, methane. Higher efficiency, proven at large scale, but greater vessel footprint and system complexity.
Commercial Structure
Project Structuring Options
Gas producer retains ownership of the LNG. FLSO operator charges a tolling fee per unit of LNG produced. Separates liquefaction risk from commodity price exposure.
FLSO developer takes an equity stake in the gas field or the LNG production — sharing upside alongside capital and operational risk.
Build-Own-Operate-Transfer arrangement. Developer finances, builds, and operates the FLSO for a defined period before transferring ownership to the gas field operator or government entity.
EPC Engagement
How We Engage
GLSB participates at the project development stage through to technical and commercial close — supporting clients who are assessing FLSO feasibility for the first time as well as developers in active project execution.
Resource assessment, technology screening, preliminary sizing, site conditions review, and high-level cost modelling.
Independent comparison of PRICO, SMR, and Cascade cycles against project-specific feedgas composition, capacity, and capex targets.
Development of tolling, equity, or BOOT structures — including offtake term sheet negotiation and project finance advisory.
Technical oversight on behalf of the asset owner during FEED and detailed engineering — ensuring the FLSO specification reflects project intent.
Assess a floating liquefaction project
GLSB supports FLSO feasibility, technology selection, and commercial structuring for stranded and sub-scale gas reserves.