Independent gas measurement for LNG terminals, FSRUs, and regasification plants.
LNG terminals are high-value transfer points where measurement accuracy has direct commercial consequences. Every ship-to-shore discharge, tank transfer, and send-out metering point carries financial exposure — and the GIIGNL calculation chain connecting liquid level to energy settlement must be independently verified to be trusted. FUTUREGAZ provides measurement review, custody transfer verification, and mass balance services for LNG import and export terminals, FSRUs, and regasification plants.
The measurement challenge at LNG terminals
An LNG terminal involves multiple measurement interfaces, each with its own instruments, methods, and uncertainty contribution. Ship-to-shore custody transfer uses tank level gauging and vapour composition sampling to calculate cargo quantity. Shore storage tanks require accurate inventory accounting for mass balance. Send-out metering at the regasification offtake determines the fiscal quantity delivered to the downstream gas network.
At each interface, the measurement result is used for commercial settlement. Errors that appear small on a percentage basis are material in absolute terms at LNG cargo scale. A systematic bias — in a level gauge, a composition analyser, or a calorific value calculation — can accumulate undetected across multiple cargoes before it is identified.
FUTUREGAZ services for LNG terminals
LNG custody transfer measurement
Independent review of ship-to-shore custody transfer measurement using the GIIGNL method. Covers ship's figure and shore figure comparison, level gauge calibration, sampling methodology, density calculation, and energy quantity determination.
Mass balance and boil-off accounting
Gas mass balance for the terminal: reconciliation of cargo received, boil-off gas generation and use, send-out quantities, and storage inventory movements. Identification of unaccounted-for losses and structured loss reporting.
Measurement system audit
Independent review of terminal measurement systems: level gauges, flow meters, composition analysers, temperature and pressure instrumentation, and DAHS configuration. Gap analysis against GIIGNL and applicable national standards.
Applicable standards for LNG terminal measurement
LNG measurement and calculation
The primary reference standard for LNG custody transfer worldwide, defining measurement procedures, density calculation methods, and calorific value determination for ship-to-shore transfers.
Refrigerated hydrocarbon liquids
ISO standard for static measurement of refrigerated hydrocarbon liquids, applicable to shore tank gauging and cargo quantity calculations at LNG terminals.
Calorific value calculation
ISO standard for the calculation of calorific value, density, relative density, and Wobbe index from gas composition — used to convert measured LNG composition to gross calorific value.
Gas flow measurement
ISO standard for measurement of gas flow in closed conduits, applicable to send-out metering and fiscal metering at regasification and vaporisation offtake points.
LNG terminal measurement support.
Describe the terminal configuration, cargo volumes, and the measurement concern. We will respond with the most relevant service and approach.
Send an enquiry contact@futuregaz.com