Overview
ISO/TS 26762:2025 - Design and operation of allocation systems used in gas production facilities provides a best-practice technical specification for designing, implementing and operating allocation systems for natural gas and associated liquids. It covers allocation of inputs and products across production, processing, transportation, storage and terminal installations - including sales gas, LPG, LNG, condensate and, to some extent, non‑hydrocarbon gases (CO2, H2). The document supplies minimum information required for internal well allocation, fiscal/commercial allocation, contractual agreements, regulatory documents and measurement/allocation audits.
Key topics and requirements
- Allocation fundamentals: definitions, objectives, types (technical vs contractual/fiscal), boundaries and stepwise allocation processes.
- Physical streams & products: classification of input streams and end products, fluid characteristics and composition considerations.
- Fluid properties & phase behavior: requirements for stabilized/equilibrium fluids, flash calculations, blending effects and use of process simulation models to support allocation (e.g., shrinkage factors).
- Measurement, sampling and analysis: flow measurement methods (single‑phase, multiphase, wet gas, indirect and virtual metering), sampling best practices, laboratory analysis and measurement uncertainty.
- Balance, reconciliation & reporting: mass/volume balance approaches, reconciliation procedures, units and timing, data flow and reporting, and auditing/fallback arrangements.
- Operational & commercial considerations: pipeline capacity, system response time, forecasting, contractual clauses, regulatory interfaces and stakeholder reporting.
- Competence & terminology: recommended areas of competence and standardized terminology for consistent implementation.
Practical applications
ISO/TS 26762:2025 is applied to:
- Develop and document allocation procedures and systems for oil & gas production and processing facilities.
- Create commercial and fiscal agreements, transportation/processing contracts and regulatory filings involving allocation rules.
- Design measurement and allocation solutions for onshore/offshore platforms, processing plants, terminals (LNG, LPG) and pipeline networks.
- Support audits of measurement systems and allocation outcomes, ensuring traceability, reconciliation and accepted uncertainty.
- Guide engineering teams in integrating process simulation and metering data to compute allocations and shrinkage.
Who should use this standard
- Upstream/downstream operators and production engineers
- Measurement and metering engineers, sampling & laboratory teams
- Commercial, regulatory and contract managers
- Consultants, auditors and technical negotiators
- Process simulation and reservoir engineers
Related guidance
Use ISO/TS 26762 alongside relevant measurement, metering and sampling standards and industry best practice documents for a complete allocation and metering governance framework.
Keywords: ISO/TS 26762:2025, allocation systems, gas production facilities, gas allocation, liquid allocation, metering, sampling, process simulation, fiscal allocation, measurement uncertainty.