CEN ISO/TS 3250:2022

SLOVENSKI STANDARD
01-september-2022
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Izračun in poročanje o učinkovitosti proizvodnje v fazi obratovanja (ISO/TS
3250:2021)
Petroleum, petrochemical and natural gas industries - Calculation and reporting
production efficiency in the operating phase (ISO/TS 3250:2021)
Erdöl-, petrochemische und Erdgasindustrie - Berechnung und Meldung der
Produktionseffizienz in der Betriebsphase (ISO/TS 3250:2021)
Industries du pétrole, de la pétrochimie et du gaz naturel - Calcul et rapport d’efficacité
de la production dans la phase d’exploitation (ISO/TS 3250:2021)
Ta slovenski standard je istoveten z: CEN ISO/TS 3250:2022
ICS:
75.020 Pridobivanje in predelava Extraction and processing of
nafte in zemeljskega plina petroleum and natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN ISO/TS 3250
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
June 2022
TECHNISCHE SPEZIFIKATION
ICS 75.020
English Version
Petroleum, petrochemical and natural gas industries -
Calculation and reporting production efficiency in the
operating phase (ISO/TS 3250:2021)
Industries du pétrole, de la pétrochimie et du gaz Erdöl-, petrochemische und Erdgasindustrie -
naturel - Calcul et rapport d'efficacité de la production Berechnung und Meldung der Produktionseffizienz in
dans la phase d'exploitation (ISO/TS 3250:2021) der Betriebsphase (ISO/TS 3250:2021)
This Technical Specification (CEN/TS) was approved by CEN on 20 June 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 3250:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO/TS 3250:2021 has been prepared by Technical Committee ISO/TC 67 "Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries” of the
International Organization for Standardization (ISO) and has been taken over as CEN ISO/TS 3250:2022
by Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum,
petrochemical and natural gas industries” the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO/TS 3250:2021 has been approved by CEN as CEN ISO/TS 3250:2022 without any
modification.
TECHNICAL ISO/TS
SPECIFICATION 3250
First edition
2021-08
Petroleum, petrochemical and natural
gas industries — Calculation and
reporting production efficiency in the
operating phase
Industries du pétrole, de la pétrochimie et du gaz naturel — Calcul et
rapport d’efficacité de la production dans la phase d’exploitation
Reference number
ISO/TS 3250:2021(E)
©
ISO 2021
ISO/TS 3250:2021(E)
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO/TS 3250:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviations .12
4 Application .13
4.1 Users of this document .13
4.2 Framework conditions .14
4.2.1 General.14
4.2.2 Quality assurance .16
4.2.3 HSE considerations .16
4.2.4 Sustainability and climate change considerations .17
4.3 Business category .17
4.4 Overview of PE calculation and reporting work process .18
4.5 Limitations .19
4.6 PE data exchange between operators in benchmarking .20
5 Performance measures .20
5.1 General .20
5.2 Production efficiency .20
5.2.1 PE forecasting .20
5.2.2 PE calculation and reporting .21
5.2.3 Initial production performance .21
5.3 PE measurement .22
5.4 PE calculation methodology .23
5.4.1 PE calculation formula .23
5.4.2 PE boundary conditions and reporting period .23
5.5 Injection efficiency calculation formula .23
6 Production .24
6.1 General .24
6.2 Material balance.24
6.3 Export – measured product .25
6.4 Conversion factors for oil equivalents .26
6.5 Injection .26
6.6 Disposal – general .26
6.7 Disposal – flaring or venting of large volumes .26
6.7.1 Production facilities with a gas export route (to sales) .26
6.7.2 Production facilities with a gas injection route only.26
6.7.3 Production facilities with no gas export route or other gas disposal routes .27
6.7.4 Flaring restrictions .27
6.8 Disposal – venting of small volumes .27
6.9 Fuel .27
6.10 Import .27
6.11 Artificial lift .28
7 Production potential .28
7.1 General .28
7.2 Methods for determination of production potential .28
7.3 Structural maximum production potential (Method A) .28
7.4 Achieved production potential (Method B) .30
7.5 Differences between Method A and Method B .30
7.6 Adjusting the production potential .31
ISO/TS 3250:2021(E)
7.7 Schedule delays .33
7.8 Injection potential .34
8 Production loss categories .35
8.1 General .35
8.2 Planned and unplanned events .35
8.3 Turnaround .35
8.4 Modification.36
8.5 Pre-production .36
8.6 Flaring and venting of gas .36
8.7 Injection .36
8.8 Accounting period .37
Annex A (normative) Production loss categorization .38
Annex B (informative) Performance measures for production availability .49
Annex C (normative) Taxonomy classification .52
Annex D (informative) Production loss subdivision with respect to system and equipment class .53
Annex E (informative) Examples.59
Bibliography .71
iv © ISO 2021 – All rights reserved

ISO/TS 3250:2021(E)
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries.
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.
ISO/TS 3250:2021(E)
Introduction
The petroleum, petrochemical and natural gas industries involve large capital expenditure as well
as operating expenditure. Revenue loss caused by production loss will affect the profitability of such
industry and for a specific plant operatorship.
Production efficiency (PE) is a term often used by operators for historic production availability in the
operating phase. PE is a reported measure, and it can be compared with the predicted (or targeted)
production availability made during a project development stage. Furthermore, PE is forecasted and
tracked during the operating phase to allow tracking of performance. ISO 20815:2018 addresses
production assurance activities including analytical methods for predicting production availability,
and also includes a production loss categorization.
This document supports this production loss categorization with a harmonized approach for calculating
and reporting production loss and production efficiency in the operating phase, including forecasting
during this life cycle phase. This will enable precise and consistent feedback of production performance
for use in production and operational planning to achieve optimal PE for the operators and associated
industry stakeholders. Focus is given to actual produced volume and reference production volume, e.g.
production potential that will depend on reservoir and well constraints, plant/process constraints,
export/transportation constraints and market constraints. Standardization of PE reporting across
the industry will drive consistency and provide better quality PE information and communication for
operators and partners.
vi © ISO 2021 – All rights reserved

TECHNICAL SPECIFICATION ISO/TS 3250:2021(E)
Petroleum, petrochemical and natural gas industries —
Calculation and reporting production efficiency in the
operating phase
1 Scope
This document provides requirements and guidance for reporting of production performance data and
production loss data in the operating phase by use of production loss categorization. It supplements the
principles of ISO 20815:2018, Clause E.3 and Annex G by providing additional details.
This document focusses on installations and asset elements within the upstream business category.
Business categories and associated installations and plants/units, systems and equipment classes are
used in line with ISO 14224:2016, Annex A.
The production loss categories given in Annex A are given at a high taxonomic level and supplements
the reporting of failure and maintenance parameters as defined in ISO 14224:2016, Annex B.
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 14224:2016, Petroleum, petrochemical and natural gas industries — Collection and exchange of
reliability and maintenance data for equipment
ISO 20815:2018, Petroleum, petrochemical and natural gas industries — Production assurance and
reliability management
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Terms and definitions
3.1.1
achieved production potential
production potential (3.1.43) that in retrospect can be verified as the maximum achievable production
in a given time period
Note 1 to entry: Achieved production potential is the sum of the achieved production and the estimated
production loss (3.1.40) occurring in the four production potential elements: well production potential (3.1.58),
plant production capacity (3.1.34), export capacity (3.1.12) and market potential (3.1.26).
Note 2 to entry: Achieved production potential can vary over time.
ISO/TS 3250:2021(E)
3.1.2
asset
item (3.1.21), thing or entity that has potential or actual value to an organization
Note 1 to entry: Physical assets usually refer to equipment, inventory and properties owned by the organization.
Physical assets are the opposite of intangible assets, which are non-physical assets such as leases, brands, digital
assets, licenses, intellectual property rights, reputation or agreements.
Note 2 to entry: A grouping of assets referred to as an asset system (see ISO 55000:2014, 3.2.5) could also be
considered as an asset.
Note 3 to entry: In this document, 'asset' only refers to the physical assets, which are tangible assets. An
organization can also operate assets that are wholly owned or partly owned through joint ventures or other
arrangements. Typically, an asset is a facility or an installation, or a group of facilities. The facility corresponds
to an installation category in ISO 14224:2016, Table A.1. These installations can be subdivided into plant/units,
systems (3.1.50), equipment classes (3.1.11), subunits, components, etc. as described in ISO 14224:2016, Table 2. In
this document, asset element (3.1.3) is used to group these as shown in Table A.2.
[SOURCE: ISO 55000:2014, 3.2.1, modified — Notes 2 and 3 to entry have become Notes 1 and 2 to entry,
respectively, new Note 3 to entry has been added.]
3.1.3
asset element
underlying item (3.1.21) for the asset (3.1.2) that is needed for the asset to deliver its product
Note 1 to entry: In this document, which is applicable for upstream business category, the asset elements are
wells (including reservoir), subsea installations, production facilities (including process and utilities), and export
and import facilities as shown in Table A.2. For other business categories, the asset elements will be different.
Note 2 to entry: The underlying items of the individual asset element will be systems (3.1.50) and relevant
equipment classes (3.1.11) as defined in ISO 14224:2016, and as shown in Table D.1.
3.1.4
availability
ability to be in a state to perform as required
Note 1 to entry: Various availability terms are defined in ISO 14224:2016, ISO 20815:2018 and ISO/TR 12489:2013.
[SOURCE: IEC 60050-192:2015, 192-01-23, modified — Note 1 to entry has been modified, Note 2 to
entry has been deleted.]
3.1.5
conventional resources
oil and gas resources where the reservoir rock characteristics and fluid trapping mechanisms permit
reservoir fluids to readily flow into the wellbore
Note 1 to entry: This usually includes conventional, reasonably permeable and connected, sandstone and
carbonate reservoirs.
3.1.6
corrective maintenance
maintenance (3.1.24) carried out after fault detection to effect restoration
[SOURCE: IEC 60050-192:2015, 192-06-06, modified — Note 1 to entry has been deleted.]
3.1.7
deliverability
ratio of deliveries to planned deliveries over a specified period of time, when the effect of compensating
elements, such as substitution from other producers and downstream buffer storage, is included
Note 1 to entry: See Figure B.1 for further information.
[SOURCE: ISO 20815:2018, 3.1.8]
2 © ISO 2021 – All rights reserved

ISO/TS 3250:2021(E)
3.1.8
down time
time interval during which an item (3.1.21) is in a down state
Note 1 to entry: The down time includes all the delays between the item failure and the restoration of its service.
Down time can be either planned or unplanned (see ISO 14224:2016, Table 4).
Note 2 to entry: Down time can be equipment down time (see Figure 4 and Table 4 in ISO 14224:2016) or
production down time (see Figures I.1 and I.2 in ISO 20815:2018). Down time for other operations such as drilling
is not addressed in this document but can affect production or prolong the production down time. It is important
to distinguish between the equipment down time itself and the down time of the plant to which the equipment
belongs; this document focusses on down time of the latter.
[SOURCE: IEC 60050-192:2015, 192-02-21, modified — New Notes 1 and 2 to entry have been added,
figure has been deleted.]
3.1.9
downstream
business category most commonly used in the petroleum industry to describe post-production
processes
Note 1 to entry: See ISO 14224:2016, A.1.4 for further details.
Note 2 to entry: The term ‘downstream’ is sometimes used in this document to reflect installations to which
products from installations within upstream business category are transported whereas these installations do
not necessarily belong to the downstream business category.
[SOURCE: ISO 14224:2016, 3.17, modified — Note 2 to entry has been added.]
3.1.10
enhanced oil recovery
EOR
reservoir process involving the injection of materials not normally present in the reservoir to enhance
the overall oil recovery from such reservoir
Note 1 to entry: Also denoted tertiary oil recovery processes; includes chemical, thermal and gas miscible
processes, among others.
3.1.11
equipment class
class of similar type of equipment units (e.g. all pumps)
Note 1 to entry: See ISO 14224:2016, Annex A for equipment specific data.
[SOURCE: ISO 14224:2016, 3.18]
3.1.12
export capacity
maximum volume rate that can be exported
Note 1 to entry: The export capacity can be limited by oil or gas or any other product (e.g. produced water and
CO ). Both the capacity of the export systems (e.g. pipeline) and the downstream receiving facilities needs to be
considered.
Note 2 to entry: The export capacity is a volume rate applicable for the product exported. Restrictions in the
flowrate to storage caused by limitations in the capacity of export pumps, pipeline capacity, etc., will affect export
capacity. Limited storage volume resulting in reduced or no production due to insufficient offtake capacity (e.g.
shuttle tanker delay) is an event and will not affect the export capacity but it is a production loss (3.1.40).
Note 3 to entry: The plant export capacity can vary over time.
ISO/TS 3250:2021(E)
3.1.13
failure
loss of ability to perform as required
Note 1 to entry: A failure of an item (3.1.21) is an event that results in a fault (i.e. a state) of that item. This is
illustrated in the figure in ISO 20815:2018, 3.1.50 for a binary system S comprising two redundant components
A and B.
[SOURCE: IEC 60050-192:2015, 192-03-01, modified — Note 1 to entry has been modified, Notes 2 and
3 to entry have been deleted.]
3.1.14
failure data
data characterizing the occurrence of a failure event
Note 1 to entry: See also ISO 14224:2016, Table 6.
[SOURCE: ISO 14224:2016, 3.25]
3.1.15
failure impact
effect of a failure (3.1.13) on an equipment’s function(s) or on the plant
Note 1 to entry: On the equipment level, failure impact can be classified in three classes (critical, degraded,
incipient); see definitions of ‘critical failure’ (ISO 14224:2016, 3.9), ‘degraded failure’ (ISO 14224:2016, 3.11)
and ‘incipient failure’ (ISO 14224:2016, 3.40). Classification of failure impact on taxonomy levels 3 to 5 (see
ISO 14224:2016, Figure 3) is shown in ISO 14224:2016, Table 3.
Note 2 to entry: Classification of failure impact on taxonomy levels 4 and 5 (see ISO 14224:2016, Figure 3) is
shown in ISO 14224:2016, Table 3. See also ISO 14224:2016, C.1.10.
[SOURCE: ISO 14224:2016, 3.28]
3.1.16
human error
discrepancy between the human action taken or omitted and that intended
Note 1 to entry: See further information in ISO 14224:2016, 3.36.
[SOURCE: IEC 60050-192:2015, 192-03-14, modified — "or required" has been deleted from the
definition, example has been deleted, Note 1 to entry has been added.]
3.1.17
improved oil recovery
IOR
process used to improve the overall oil recovery from a reservoir, including but not limited to enhanced
oil recovery (3.1.10)
Note 1 to entry: IOR includes not only reservoir recovery processes (secondary and tertiary), but also other
techniques such as infill drilling and artificial lift.
Note 2 to entry: Secondary recovery processes refer to processes involving the injection of gas and/or water,
mostly for maintaining reservoir pressure.
3.1.18
injection efficiency
IE
I
E
ratio of injected volume to the injection potential (3.1.19) over a specified period of time
Note 1 to entry: This is a volume-based performance measure similar to production efficiency (3.1.39).
Note 2 to entry: Injection availability is a time-based measure.
4 © ISO 2021 – All rights reserved

ISO/TS 3250:2021(E)
3.1.19
injection potential
V
IP
maximum volume that can be injected in a reservoir within a given time period, considering the
capacity of injection systems and injection wells
Note 1 to entry: Injection potential can be related to injection of gas, water, CO or other products.
Note 2 to entry: The maximum volume that can be injected may be taken to mean the ‘optimum’ volume that
is injected to achieve optimal reservoir management. The optimum volume is often the one that maximizes
economic recovery from the field. This optimum volume can be less than the maximum volume defined by the
physical system capacity of the injection system, wells or reservoir.
3.1.20
integrity
ability of a barrier to function as required when needed
Note 1 to entry: See ISO/TR 12489:2013, 3.1.2 for definition of safety integrity.
Note 2 to entry: There are different definitions of integrity: plant, asset (3.1.2), system (3.1.50), pipeline (see
DNVGL -ST -F101: 2017), well (see ISO 16530-1:2017, 3.73), mechanical, safety (see ISO/TR 12489:2013, 3.1.2),
structural (see ISO 19900:2019, 3.50) and technical.
[SOURCE: ISO 20815:2018, 3.1.22]
3.1.21
item
subject being considered
Note 1 to entry: The item can be an individual part, component, device, functional unit, equipment, subsystem, or
system (3.1.50).
Note 2 to entry: The item may consist of hardware, software, people or any combination thereof.
Note 3 to entry: In this document, item can also be plant/unit and installation. See also ISO 14224:2016, Figure 3.
[SOURCE: IEC 60050-192:2015, 192-01-01, modified — Notes 3, 4 and 5 to entry have been deleted, new
Note 3 to entry has been added.]
3.1.22
life cycle phase
discrete stage in the life cycle with a specified purpose
Note 1 to entry: The different life cycle phases ‘Explore’, ‘Appraise’, ‘Select’, ‘Define’, ‘Execute’, ‘Operate’ and
‘Abandon’ are further described in ISO 15663:2021, 4.5.
Note 2 to entry: This document focusses on the life cycle phase ‘Operate’ and uses the term ‘operating phase’ in
this respect.
[SOURCE: ISO 15663:2021, 3.1.28, modified — Note 2 to entry has been added.]
3.1.23
lost revenue
total cost of lost or deferred production due to down time (3.1.8)
Note 1 to entry: See further information regarding estimation of lost revenue in ISO 15663:2021, Clause C.4, and
a more general definition of lost revenue is given in ISO 15663:2021, 3.1.29.
[SOURCE: ISO 20815:2018, 3.1.25, modified — Note 1 to entry has been added.]
ISO/TS 3250:2021(E)
3.1.24
maintenance
combination of all technical and management actions intended to retain an item (3.1.21) in, or restore it
to, a state in which it can perform as required
[SOURCE: IEC 60050-192:2015, 192-06-01, modified — Note 1 to entry has been deleted.]
3.1.25
maintenance impact
effect of the maintenance (3.1.24) on the plant or equipment’s function(s)
Note 1 to entry: On the equipment level, two classes of impact are defined: critical and non-critical. On plant level,
three classes are defined: total, partial or zero impact.
Note 2 to entry: For the calculation of PE data, it can be beneficial to separate the production loss (3.1.40) arising
from the failure event and from the maintenance impact on production, into two different production loss
categories. See further guidance in A.3.2.
[SOURCE: ISO 14224:2016, 3.52, modified — Note 2 to entry has been added.]
3.1.26
market potential
maximum volume rate that can be received by the market
Note 1 to entry: A sales contract can limit the market potential.
Note 2 to entry: The market potential can vary over time.
Note 3 to entry: The market potential reflects market constraints when determining the structural maximum
production potential (3.1.49). When determining the structural maximum injection potential (3.1.48) market
potential means the maximum volume that can be delivered by the market.
3.1.27
midstream
business category involving the processing, storage and transportation sectors of the petroleum
industry
Note 1 to entry: See ISO 14224:2016, A.1.4 for further details.
[SOURCE: ISO 14224:2016, 3.65, modified — Example has been deleted.]
3.1.28
modification
combination of all technical and administrative actions intended to change an item (3.1.21)
Note 1 to entry: Modification is not normally part of maintenance (3.1.24) but is frequently performed by
maintenance personnel. This is typically the maintenance activity ‘Modify’ as defined in ISO 14224:2016,
Table B.5.
Note 2 to entry: In this document, the use of the term modification is primarily meant to cover major modification
activities. See further details in 8.2.2 with respect to how such major modifications are reflected in PE reporting.
[SOURCE: ISO 14224:2016, 3.67, modified — Notes 2 and 3 to entry have been deleted, new Note 2 to
entry has been added.]
3.1.29
operative well
well that it is economically warrantable to operate
Note 1 to entry: The individual well potential is part of the well production potential (3.1.58) even if the well is
temporarily shut down due to equipment failure, well intervention, valve testing, reservoir monitoring, etc. See
also Table 4.
6 © ISO 2021 – All rights reserved

ISO/TS 3250:2021(E)
Note 2 to entry: Economic warrantability will be defined by the operator. Various economic subject matters will
determine this economic margin, e.g. CAPEX, OPEX and revenue factors.
3.1.30
performance objective
indicative level for the desired performance
Note 1 to entry: Objectives are expressed in qualitative or quantitative terms. Objectives are not absolute
requirements and may be modified based on cost or technical constraints. See further details in ISO 20815:2018,
Annex F.
[SOURCE: ISO 20815:2018, 3.1.41]
3.1.31
performance requirement
required minimum level for the performance of the system (3.1.50)
Note 1 to entry: Requirements are normally expressed in quantitative terms, but may also be expressed in
qualitative terms.
[SOURCE: ISO 20815:2018, 3.1.42, modified — Note 1 to entry has been modified.]
3.1.32
petrochemical
business category producing the chemicals derived from petroleum and used as feedstock for the
manufacture of a variety of plastics and other related products
Note 1 to entry: See ISO 14224:2016, A.1.4 for further details.
[SOURCE: ISO 14224:2016, 3.75, modified — Example has been deleted.]
3.1.33
planned event
event that is intentional, the start and end time is determined, and the effect of the event in terms of
consequences is predictable
Note 1 to entry: See further information in 8.2.
Note 2 to entry: See production loss categories associated with planned events in Table A.1.
3.1.34
plant production capacity
maximum processed volume through the plant that can be achieved in the absence of any failure,
interruption or any other event
Note 1 to entry: The plant production capacity is related to the product used for production efficiency calculation
(see 7.3). The plant production capacity can be limited by the capacity of systems handling other product streams,
e.g. condensate, gas or produced water, or by the capacity of utility systems.
Note 2 to entry: The plant production capacity can vary over time.
Note 3 to entry: The plant represents the systems (3.1.50) between the elements well and export as illustrated in
Figure 5.
3.1.35
preventive maintenance
maintenance (3.1.24) carried out to mitigate degradation and reduce the probability of failure (3.1.13)
Note 1 to entry: See also condition-based maintenance and planned (scheduled) maintenance.
Note 2 to entry: Preventive maintenance can be categorized as shown in ISO 14224:2016, Figure 6.
[SOURCE: IEC 60050-192:2015, 192-06-05 — Note 2 to entry has been added]
ISO/TS 3250:2021(E)
3.1.36
primary product
hydrocarbon product that is the main contributor to the production target from an asset (3.1.2)
Note 1 to entry: The primary product can be crude oil, condensate or gas. The primary product from an asset (e.g.
an individual upstream field or field infrastructure consisting of various installations) will be a result of reservoir
characteristics, field development planning and facility design as determined by the production strategy of the
field or installation in question.
Note 2 to entry: The primary product can change throughout the operating phase of the asset.
3.1.37
production assurance
activities implemented to achieve and maintain a performance that is at its optimum in terms of the
overall economy and at the same time consistent with applicable framework conditions
Note 1 to entry: Production assurance activities relate closely to the integrity management of the installations.
See definition of integrity (3.1.20).
Note 2 to entry: See further information in ISO 20815:2018 with respect to production assurance (3.1.37) for a
variety of oil and gas activities.
[SOURCE: ISO 20815:2018, 3.1.45, modified — Note 2 to entry has become Note 1 to entry, new Note 2
to entry has been added.]
3.1.38
production availability
P
A
ratio of production to planned production, or any other reference level, over a specified period of time
Note 1 to entry: This measure is used in conjunction with analysis of delimited systems without compensating
elements such as substitution from other producers and downstream buffer storage. Battery limits need to be
defined in each case.
Note 2 to entry: See ISO 20815:2018, Clause G.1 and Figure G.1 for further information.
[SOURCE: ISO 20815:2018, 3.1.46, modified — Notes 1, 3, 4 and 5 to ent
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