ISO/TS 16530-2:2014

TECHNICAL ISO/TS
SPECIFICATION 16530-2
First edition
2014-08-15
Well integrity —
Part 2:
Well integrity for the operational
phase
Intégrité du puits —
Partie 2: Intégrité du puits pour la phase opérationnelle
Reference number
ISO/TS 16530-2:2014(E)
©
ISO 2014

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ISO/TS 16530-2:2014(E)

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© ISO 2014
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ISO/TS 16530-2:2014(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 2
3 Terms, definitions and abbreviated terms . 2
4 Abbreviated terms . 8
5 Well integrity management system .10
5.1 Well integrity management .10
5.2 Well integrity management system.10
6 Well integrity policy and strategy .10
6.1 Well integrity policy .10
6.2 Well integrity strategy .10
7 Resources, roles, responsibilities and authority levels .11
7.1 Organizational structure .11
7.2 Competency .11
8 Risk assessment aspects of well integrity management .11
8.1 General .11
8.2 Risk assessment considerations for well integrity .12
8.3 Risk assessment techniques .15
8.4 Application of risk assessment in establishing monitoring, surveillance and
maintenance requirements .16
8.5 Application of risk assessment in the assessment of well integrity anomalies .17
8.6 Failure rate trending .17
9 Well barriers .18
9.1 General .18
9.2 Barrier philosophy .18
9.3 Well barrier envelopes .19
9.4 Well barrier element .19
9.5 Documenting of well barrier envelopes and well barrier elements .20
10 Well component performance standard .20
10.1 General .20
10.2 Acceptance criteria and acceptable leak rates .21
10.3 Measuring the leak rate .23
10.4 Effects of temperature .23
10.5 Direction of flow .23
10.6 Integrity of barriers to conduct well maintenance and repair .23
10.7 ESD/related safety systems .23
10.8 Well component operating procedure .24
11 Well operating and component limits .24
11.1 Well operating limits .24
11.2 Well load and tubular stress analysis .25
11.3 Further well-use review .26
11.4 End-of-life review .26
11.5 Management of change to the operating limits .26
12 Well monitoring and surveillance .26
12.1 General .26
12.2 Monitoring and surveillance frequency .27
12.3 Shut-in wells .27
12.4 Suspended wells .27
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ISO/TS 16530-2:2014(E)

12.5 Visual inspection .28
12.6 Well logging .28
12.7 Corrosion monitoring.29
12.8 Cathodic protection monitoring .29
12.9 Erosion monitoring .30
12.10 Structural integrity monitoring .30
13 Annular pressure management .32
13.1 General .32
13.2 Management .32
13.3 Sources of annular pressure .32
13.4 Annulus pressure monitoring and testing .33
13.5 Frequency of monitoring tubing and annulus casing pressures .33
13.6 Identification of an annulus pressure source .34
13.7 Maximum allowable annular surface pressure .34
13.8 Maintaining annulus pressure within the thresholds .37
13.9 Review and change of MAASP and thresholds.37
14 Well handover.38
14.1 General .38
15 Well maintenance .39
15.1 General .39
15.2 Replacement parts .40
15.3 Frequency of maintenance.40
15.4 Component testing methods .40
15.5 Leak testing .42
16 Well integrity failure management .43
16.1 General .43
16.2 Integrity failure ranking and prioritization .43
16.3 Well failure model .43
17 Management of change .44
17.1 General .44
17.2 Integrity deviation process .45
17.3 Deviation from the well performance standard .45
17.4 MOC Process .45
18 Well records and well integrity reporting .46
18.1 General .46
18.2 Well records .47
18.3 Reports .47
19 Performance monitoring of well integrity management systems .48
19.1 Performance monitoring and continuous improvement .48
19.2 Performance review .48
19.3 Key performance indicator monitoring .50
20 Compliance audit .51
20.1 General .51
20.2 Audit process .52
Annex A (informative) Well integrity roles and responsibilities chart .53
Annex B (informative) Example of competency matrix .54
Annex C (informative) Barrier element acceptance table .55
Annex D (informative) Well barrier schematic .56
Annex E (informative) Example — Performance standard for well safety critical elements .58
Annex F (informative) Well barrier elements, functions and failure modes .59
Annex G (informative) Example of possible well leak paths .62
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ISO/TS 16530-2:2014(E)

Annex H (informative) Example of leak testing gas lift valves .64
Annex I (informative) Leak rate determination calculations .66
Annex J (informative) Well operating limits .69
Annex K (informative) MAASP calculations .71
Annex L (informative) Example — A change in MAASP calculation .79
Annex M (normative) Information required of well handover .81
Annex N (informative) Function testing by analysing hydraulic signature .84
Bibliography .86
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ISO/TS 16530-2:2014(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 4, Drilling and production
equipment.
ISO/TS 16530 consists of the following parts, under the general title Well integrity:
— Part 2: Well integrity for the operational phase
The following parts are under preparation:
— Part 1: Life cycle governance manual
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ISO/TS 16530-2:2014(E)

Introduction
This Technical Specification has been developed by producing operating companies for oil and gas, and
is intended for use in the petroleum and natural gas industry worldwide. This Technical Specification
is intended to give requirements and information to the Well Operator on managing well integrity for
the operational phase. Furthermore, this Technical Specification addresses the minimum compliance
requirements for the Well Operator, in order to claim conformity with this Technical Specification.
It is necessary that users of this Technical Specification are aware that requirements above those outlined
in this Technical Specification can be needed for individual applications. This Technical Specification is
not intended to inhibit or replace legal requirements; it is in addition to the legal requirements; where
there is a conflict the legal requirement always takes precedence. This can be particularly applicable
where there is innovative or developing technology, with changes in field or well design operating
philosophy.
This Technical Specification addresses the process of managing well integrity by assuring compliance
to the specified operating limits for identified well types, that are defined based on exposure of risk
to people, environment, assets and reputation, supported by associated well maintenance/monitoring
plans, technical reviews and management of change.
The following terminology is used in this Technical Specification.
a) The term “shall” or “must” denotes a minimum requirement in order to conform to this Technical
Specification.
b) The term “should” denotes a recommendation or that which is advised but not required in order to
conform to this Technical Specification.
c) The term “may” is used to indicate a course of action permissible within the limits of the document.
d) The term “consider” is used to indicate a suggestion or to advise.
e) The term “can” is used to express possibility or capability.
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TECHNICAL SPECIFICATION ISO/TS 16530-2:2014(E)
Well integrity —
Part 2:
Well integrity for the operational phase
IMPORTANT — The electronic file of this document contains colours which are considered to be
useful for the correct understanding of the document. Users should therefore consider printing
this document using a colour printer.
1 Scope
This Technical Specification provides requirements and methods to the oil and gas industry to manage
well integrity during the well operational phase.
The operational phase is considered to extend from handover of the well after construction, to handover
prior to abandonment. This represents only the period during the life cycle of the well when it is being
operated and is illustrated in Figure 1.
The scope of the Technical Specification includes:
— A description of the processes required to assess and manage risk within a defined framework. The
risk assessment process also applies when deviating from this Technical Specification.
— The process of managing well integrity by operating wells in compliance with operating limits
for all well types that are defined based on exposure of risk to people, environment, assets and
reputation. The management of well integrity is supported by associated maintenance/monitoring
plans, technical reviews and the management of change.
— The assessment of existing assets (wells / fields) in order to start the process of Well Integrity
Management in accordance with this technical specification.
— The handover process required when changing from one activity to another during the operational
phase.
The scope of the Technical Specification applies to all wells that are utilized by the oil and gas industry,
regardless of their age, type or location.
The scope of the Technical Specification does NOT apply to:
— The periods during well intervention or work-over activities but it DOES include the result of the
intervention and any impact that this can have to the well envelope and the associated well barriers.
— The equipment that is required or used outside the well envelope for a well intervention such as
wire-line or coiled tubing or a pumping package.
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ISO/TS 16530-2:2014(E)

Well
Detailed
Well
Well
Construction
Well
Abandonment
Planning
Design
Well
Hand-
over
Well
Well
Intervention
or Workover
Operational
Phase
Well Well
Hand- Hand-
over over
Figure 1 — Illustration of the scope of this Technical Specification
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 10417:2004, Petroleum and natural gas industries — Subsurface safety valve systems — Design,
installation, operation and redress
API RP 14H, Recommended Practice for Installation, Maintenance and Repair of Surface Safety Valves and
Underwater Safety Valves Offshore, Fifth Edition
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
3.1
A-annulus
designation of annulus between the production tubing and production casing
[SOURCE: API RP 90, modified]
3.2
abandoned well
permanent subsurface isolation of the well
3.3
ambient pressure
pressure external to the wellhead
Note 1 to entry: In the case of a surface wellhead, the pressure is zero psig. In the case of a subsea wellhead, it is
equal to the hydrostatic pressure of seawater at the depth of the subsea wellhead, in psig.
[SOURCE: API RP 90, modified]
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ISO/TS 16530-2:2014(E)

3.4
anomaly
condition that differs from what is expected or typical, or which differs from that predicted by a
theoretical model
3.5
B-annulus
designation of annulus between the production casing and the next outer casing
Note 1 to entry: The letter designation continues in sequence for each outer annular space encountered between
casing strings, up to and including the surface
...