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EN ISO 6338-2:2026

Calculations of greenhouse gas (GHG) emissions throughout the liquefied natural gas (LNG) chain - Part 2: Natural gas production and transport to LNG plant (ISO 6338-2:2024)

Edition date: 2026-07-22
In Force
Available languages: English, French
Summary: This document provides a method to calculate the greenhouse gas (GHG) emissions during natural gas production (onshore or offshore), gas processing and gas transport to liquefied natural gas (LNG) liquefaction plant. NOTE          It can be applied to other gases as biogas or non-traditional types of natural gas. This document covers all facilities associated with producing natural gas, including: —     drilling (exploration, appraisal, and development) and production wells; —     gas gathering network and boosting stations (if any); —     gas processing facilities (if any), transport gas pipelines with compression stations (if any) up to inlet valve of LNG liquefaction plant. This document covers facilities associated with producing other products (such as, but not limited to, domestic gas, condensate, Liquefied Petroleum Gas (LPG), sulphur, power export) to the extent required to allocate GHG emissions to each product. This document covers the upstream facilities “under operation”, including emissions associated with commissioning, initial start-up and restarts after maintenance or upset. This document does not cover the exploration, construction and decommissioning phases or the losses from vegetation coverage. This document covers all GHG emissions associated with production, process and transport of natural gas to the LNG liquefaction plant. These emissions spread across scope 1, scope 2 and scope 3 of the responsible organization, as defined in ISO 6338-1. All emissions sources are covered including flaring, combustion, cold vents, process vents, fugitive leaks and emissions associated with imported energy. Gases covered include CO2, CH4, N2O and fluorinated gases. This document does not cover compensation. This document defines preferred units of measurement and necessary conversions. This document also recommends instrumentation and estimations methods to monitor and report GHG emissions. Some emissions are measured; and some are estimated.

Le présent document fournit une méthode pour calculer les émissions de GES pendant la production de gaz naturel (à terre ou en mer), le traitement du gaz et le transport du gaz vers une usine de liquéfaction de GNL. NOTE          Cette méthode peut être appliquée à d'autres gaz tels que le biogaz ou des types de gaz naturel non traditionnels. Le document couvre toutes les installations associées à la production de gaz naturel, y compris: —     forage (exploration, évaluation et développement) et puits de production; —     réseau de collecte de gaz et stations de surpression (le cas échéant); —     installations de traitement du gaz (le cas échéant), canalisations de transport avec stations de compression (le cas échéant). Le présent document couvre les installations naturelles associées à la production d'autres produits (tels que le gaz domestique, le condensat, le GPL, le soufre, l'exportation d'électricité, sans toutefois s'y limiter) afin de pouvoir allouer les émissions de GES à chaque produit. Le présent document couvre les installations en amont “en cours d'exploitation”, y compris les émissions associées à la mise en service, au démarrage initial et aux redémarrages après maintenance ou perturbation. Il ne couvre pas les phases d'exploration, de construction et de mise hors service, ni les pertes dues à la couverture végétale. Le présent document couvre toutes les émissions de GES associées à la production, au traitement et au transport du gaz naturel vers l'usine de liquéfaction de GNL. Ces émissions se répartissent entre la catégorie 1, la catégorie 2 et la catégorie 3 de l'organisme responsable, comme défini dans l’ISO 6338-1.  Toutes les sources d'émission sont couvertes, y compris le torchage, la combustion, les évents froids, les évents de procédé, les fuites fugitives et les émissions associées à l'énergie importée. Les gaz à prendre en compte sont le CO2, le CH4, le N2O et les gaz fluorés. Le présent document ne couvre pas la compensation. Le présent document définit les unités de mesure privilégiées et les conversions nécessaires. Ce document recommande également l'instrumentation et les méthodes d'estimation pour surveiller et déclarer les émissions de GES. Certaines émissions sont mesurées et d'autres estimées.

Dieses Dokument enthält ein Verfahren zur Berechnung der Treibhausgasemissionen (THG) bei der Erdgasförderung (On- oder Offshore), der Gasverarbeitung und dem Gastransport zur Flüssigerdgas-(LNG)-Verflüssigungsanlage. ANMERKUNG Das Verfahren kann auf Gase angewandt werden, bei denen es sich nicht um Biogas oder nicht herkömmliche Arten von Erdgas handelt. Dieses Dokument behandelt alle Anlagen im Zusammenhang mit der Erdgasförderung, darunter:  Bohren (Exploration, Gutachten und Entwicklung) und Förderbohrungen;  Gassammelnetz und Verdichterstationen (falls vorhanden);  Gasverarbeitungsanlagen (falls vorhanden), Gastransportleitungen mit Verdichterstationen (falls vorhanden) bis zum Einlassventil der LNG-Verflüssigungsanlage. Dieses Dokument behandelt Anlagen, die mit der Herstellung anderer Produkte (wie unter anderem Heizgas, Kondensat, Flüssiggas (LPG), Schwefel, Export von elektrischer Energie) verbunden sind, soweit dies für die Zuordnung der THG-Emissionen zu jedem Produkt erforderlich ist. Dieses Dokument behandelt die vorgelagerten Anlagen „in Betrieb“, wozu auch die Emissionen zählen, die bei der Inbetriebsetzung, dem erstmaligen Anfahren und dem Wiederanfahren nach einer Wartung oder Störung entstehen. Dieses Dokument behandelt nicht die Phasen der Exploration, des Baus und der Stilllegung oder die Verluste durch Pflanzenbewuchs. Dieses Dokument behandelt alle Treibhausgasemissionen, die mit der Förderung, Verarbeitung und dem Transport von Erdgas zur LNG-Verflüssigungsanlage in Zusammenhang stehen. Diese Emissionen verteilen sich auf die Anwendungsbereiche 1, 2 und 3 der verantwortlichen Organisation, wie in ISO 6338 1 festgelegt. Dabei werden alle Emissionsquellen erfasst, einschließlich Abfackeln, Verbrennen, (prozessorientiertes) Abblasen sowie flüchtige Leckagen und Emissionen im Zusammenhang mit importierter Energie. Zu den behandelten Gasen gehören CO2, CH4, N2O und fluorierte Gase. Dieses Dokument ist nicht anwendbar für die Kompensation. In diesem Dokument werden die bevorzugten Maßeinheiten und die erforderlichen Umrechnungen festgelegt. Das Dokument enthält auch Empfehlungen für Mess- und Schätzverfahren zur Überwachung und zum Berichten von THG-Emissionen. Einige Emissionen werden gemessen, andere dagegen geschätzt.
ICS: 75.020-Extraction and processing of petroleum and natural gas, 13.020.40-Pollution, pollution control and conservation
CTN: CEN/TC 282 - 6263

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