ISO/PRF 6338-2

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

Calcul des émissions de gaz à effet de serre (GES) dans la chaîne gaz naturel liquéfié (GNL) — Partie 2: Production du gaz naturel et transport à l’usine GNL

General Information

• Status: Not Published
• ICS: 13.020.40 - Pollution, pollution control and conservation
• ICS: 75.020 - Extraction and processing of petroleum and natural gas
• Technical Committee: ISO/TC 67/SC 9 - Liquefied natural gas installations and equipment
• Drafting Committee: ISO/TC 67/SC 9 - Liquefied natural gas installations and equipment
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Completion Date: 01-Jul-2024

Standards Content (Sample)

International
Standard
ISO 6338-2
First edition
Calculations of greenhouse gas
(GHG) emissions throughout the
liquefied natural gas (LNG) chain —
Part 2:
Natural gas production and
transport to LNG plant
Calcul des émissions de gaz à effet de serre (GES) dans la chaîne
gaz naturel liquéfié (GNL) —
Partie 2: Production du gaz naturel et transport à l’usine GNL
PROOF/ÉPREUVE
Reference number
ISO 6338-2:2024(en) © ISO 2024

ISO 6338-2:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 6338-2:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principles . 2
5 GHG inventory boundaries . 2
6 Quantification of GHG emissions . 3
6.1 General .3
6.2 Defining the upstream system .3
6.2.1 General .3
6.2.2 Gas production feeding LNG liquefaction directly .3
6.2.3 Oil production with associated gas feeding LNG liquefaction .3
6.2.4 LNG liquefaction fed from gas grid .4
6.2.5 LNG liquefaction supplied with non-fossil feed .4
6.3 Identification of GHG sources and quantification approach .5
6.3.1 General .5
6.3.2 Emissions from fuel combustion . .5
6.3.3 Emissions from flaring and venting .5
6.3.4 Fugitive emissions .6
6.3.5 Emissions associated with imported energy, utilities, and consumables .6
6.4 Calculation of GHG emissions .7
6.5 Preferred units .7
6.6 Allocation .7
6.7 Carbon capture .8
7 GHG inventory quality management . 8
8 GHG reporting . 8
9 Independent review . . 8
Bibliography . 9
PROOF/ÉPREUVE
iii
ISO 6338-2:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower carbon
energy, Subcommittee SC 9, Production, transport and storage facilities for cryogenic liquefied gases.
A list of all parts in the ISO 6338 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
PROOF/ÉPREUVE
iv
ISO 6338-2:2024(en)
Introduction
Natural gas will play a key role in the energy transition (e.g. by replacing coal to produce electricity) and the
use of liquefied natural gas (LNG) to transport natural gas is expected to increase. The process of liquefying
natural gas is energy-intensive. Gas producers are increasingly accountable for their greenhouse gas (GHG)
emissions and the ambition to reduce them. Furthermore, there is an emerging marketing demand for GHG
data to enable commercial mechanisms such as offsetting to be utilized.
There is no standardized and auditable methodology to calculate the carbon footprint of the whole LNG
chain (including but not limited to the well, upstream treatment, transportation, liquefaction, shipping,
regasification and end user distribution). Various standards indicate possible approaches but are
inconsistent in their results or not easily applicable.
The ISO 6338 series covers each part of the LNG chain and enables a consistent GHG inventory.
The KPIs and related requirements to access to key international initiatives, agreements and reporting/
accounting standards on climate ambitions and zero carbon emission strategies are given in ISO 6338-1:2024,
Annex B.
Attention should be paid to activities that can occur in different parts (e.g. gas treatment and distribution
upstream of the liquefaction plant).
NOTE It is not possible to make like-for-like comparisons, or define a certification scheme, for one block only.
PROOF/ÉPREUVE
v
International Standard ISO 6338-2:2024(en)
Calculations of greenhouse gas (GHG) emissions throughout
the liquefied natural gas (LNG) chain —
Part 2:
Natural gas production and transport to LNG plant
1 Scope
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
CO , CH , N O and fluorinated gases.
2 4 2
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 6338-1, Calculations of greenhouse gas (GHG) emissions throughout the liquefied natural gas (LNG) chain —
Part 1: General
ISO 14044, Environmental management — Life cycle assessment — Requirements and guidelines
PROOF/ÉPREUVE
ISO 6338-2:2024(en)
ISO 14064-1, Greenhouse gases — Part 1: Specification with guidance at the organization level for quantification
and reporting of greenhouse gas emissions and removals
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14064-1 and ISO 6338-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principles
The principles gi
...

ISO/TC 67/SC 9/WG 10
Date: 2024-06-21
Secretariat: AFNOR
Date: 2024-06-27
Calculations of greenhouse gas (GHG) emissions throughout the
liquefied natural gas (LNG) chain– —
Part 2:
Natural gas production and transport to LNG plant
Calcul des émissions de gaz à effet de serre (GES) dans la chainechaîne gaz naturel liquéfié (GNL) – —
Partie 2: Production du gaz naturel et transport à l’usine GNL
PROOF
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel.Phone: + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2024 – All rights reserved
ii
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Principles . 2
5 GHG inventory boundaries . 2
6 Quantification of GHG emissions . 3
6.1 General . 3
6.2 Defining the upstream system . 3
6.2.1 General . 3
6.2.2 Gas production feeding LNG liquefaction directly . 4
6.2.3 Oil production with associated gas feeding LNG liquefaction . 4
6.2.4 LNG liquefaction fed from gas grid . 5
6.2.5 LNG liquefaction supplied with non-fossil feed . 6
6.3 Identification of GHG sources and quantification approach . 6
6.3.1 General . 6
6.3.2 Emissions from fuel combustion . 6
6.3.3 Emissions from flaring and venting . 7
6.3.4 Fugitive emissions . 8
6.3.5 Emissions associated with imported energy, utilities, and consumables . 8
6.4 Calculation of GHG emissions . 9
6.5 Preferred units . 9
6.6 Allocation . 9
6.7 Carbon capture . 10
7 GHG inventory quality management . 10
8 GHG reporting . 10
9 Independent review . 10
Bibliography . 11

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower carbon
energy, Subcommittee SC 9, Production, transport and storage facilities for cryogenic liquefied gases.
A list of all parts in the ISO 6338 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv © ISO 2024 – All rights reserved
iv
Introduction
Natural gas will play a key role in the energy transition (e.g. by replacing coal to produce electricity) and the
use of liquefied natural gas (LNG) to transport natural gas is expected to increase. The process of liquefying
natural gas is energy-intensive. Gas producers are increasingly accountable for their greenhouse gas (GHG)
emissions and the ambition to reduce them. Furthermore, there is an emerging marketing demand for GHG
data to enable commercial mechanisms such as offsetting to be utilized.
There is no standardized and auditable methodology to calculate the carbon footprint of the whole LNG chain
(including but not limited to the well, upstream treatment, transportation, liquefaction, shipping,
regasification and end user distribution). Various standards indicate possible approaches but are inconsistent
in their results or not easily applicable.
The ISO 6338 series covers each part of the LNG chain and enables a consistent GHG inventory.
The KPIs and related requirements to access to key international initiatives, agreements and
reporting/accounting standards on climate ambitions and zero carbon emission strategies are given in ISO
6338-1:2024, Annex B.
Attention should be paid to activities that can occur in different parts (e.g. gas treatment and distribution
upstream of the liquefaction plant).
NOTE It is not possible to make like-for-like comparisons, or define a certification scheme, for one block only.
v
INTERNATIONAL STANDARD
ISO 6338-2:2024(E)
Calculations of greenhouse gas (GHG) emissions throughout the
liquefied natural gas (LNG) chain – —
Part 2:
Natural gas production and transport to LNG plant
1 Scope
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 1: 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
CO , CH , N O and fluorinated gases.
2 4 2
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 6338-1, Calculations of greenhouse gas (GHG) emissions throughout the liquefied natural gas (LNG) chain
— Part 1: General
ISO 14044, Environmental management — Life cycle assessment — Requirements and guidelines
ISO 14064--1, Greenhouse gases — Part 1: Specification with guidance at the organization level for
quantification and reporting of greenhouse gas emissions and removals
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14064-1 and ISO 6338-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
4 Principles
The principles given in ISO 6338-1 shall be followed.
5 GHG inventory boundaries
The GHG report for an onshore or offshore plant for the production, processing and conditioning of natural
gases (NG) to be used as LNG shall cover all facilities which are associated to produce LNG. The list in
Table 1Table 1 is not exhaustive.
Table 1 — List of facilities within the scope of this document
NG production, processing and conditioning
In scope Out of scope
plant facility
Natural gas production wells X
Natural gas gathering system X
Slugcatchers and condensate removal facilities X
Sour gases removal units X
Mercury removal units X
Dehydration and water removal units X
Any other natural gas conditioning units X
Natural gas stabilization units X
Dew point adjustment units X
Quality adjustment and metering units X
2 © ISO 2024 – All rights reserved
NG production, processing and conditioning
In scope Out of scope
plant faci
...