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CSA Z624:20 Well integrity management for petroleum and natural gas industry systems
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CSA Z624:20
September 2020
Title: Well integrity management for petroleum and natural gas industry systems
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CSA Z624:20
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ICS 75.020
ISBN 978-1-4883-3198-5
© 2020 Canadian Standards Association
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CSA Z624:20
Well integrity management for petroleum and natural gas
industry systems
Technical Committee on Well Design and Well Integrity Management 4
Preface 7
0 Introduction 8
Scope 8
Reference publications 9
Definitions and abbreviations 11
Definitions 11
Abbreviations 13
Well integrity management framework 13
General 14
Well life cycle 14
General 14
Well integrity management systems 14
Risk management 14
General 14
Risk assessment process 14
Well barrier philosophy 15
General 15
Well barriers 15
Well barrier element objectives 16
Number of well barriers 16
Schematics 16
Well barrier element acceptance criteria 17
Well barrier element verification 18
General 18
Pass/fail criteria 18
Leak testing 18
Modelling 19
Well operating limits 19
Reporting and documentation 20
General 20
Well life cycle phase deliverables 20
Well handover process 20
Management of change 21
Lessons learned 21
General 21
Performance monitoring 21
Design 21
Well construction 22
September 2020 © 2020 Canadian Standards Association 1
CSA Z624:20
Well integrity management for petroleum and natural gas
industry systems
General 22
Drilling 22
Well barrier elements during drilling 22
Drilling and well control fluids 22
Kick tolerance 22
Casing wear and erosion 23
Open hole logging 23
General 23
Logging 23
Casing running 24
Casing 24
Inspection and verification 24
Casing installation 25
Casing cement 25
Cased hole well barrier inspection and verification 26
Completions 27
Wellhead and tree assembly 27
Installation practices 27
Re-use/re-conditioning 28
Documentation and records 28
Well construction 28
Cementing records 28
Pressure test records 28
Casing running records 29
Casing integrity inspection records 29
Wellhead and tree assembly records 29
Operation 29
Well barrier elements 30
Monitoring and inspection 30
Wellsite barricades 30
Suspended and shut-in wells 31
Lockouts 31
Shutting-in wells 31
Management of change 31
Annulus pressure management 31
Well barrier element maintenance 31
General 32
Maintenance program 32
Manufacturer recommendations 32
Maintenance program review and update 32
Management of well integrity failures 32
Response to well barrier failure 32
Standard operating procedures 33
Maintaining mitigation measures 33
Documentation and records 33
Well handover 33
Intervention 33
September 2020 © 2020 Canadian Standards Association 2
CSA Z624:20
Well integrity management for petroleum and natural gas
industry systems
Risk assessment 33
General 33
Standard approach 34
Assessment scope 34
Risk mitigation 34
Well barrier element specifications 34
Well intervention plan 34
Well intervention plan review 34
Documentation and records 34
General 34
Well operating limits 35
Wellbore schematics 35
Well barrier schematics 35
Decommissioning 35
General 35
Risk assessment 36
Well barrier elements 36
General 36
Barriers behind casing 36
Barriers inside casing 36
Cut and cap 36
Verification of integrity 36
General 36
Inside casing 36
Behind casing 36
Monitoring 36
Documentation and records 36
Annex A (informative) — Examples of wellhead and wellbore schematics 38
September 2020 © 2020 Canadian Standards Association 3
CSA Z624:20
Well integrity management for petroleum and natural gas
industry systems
This is the first edition of CSA Z624, Well integrity management for petroleum and natural gas industry systems.
CSA Group acknowledges that the development of this Standard was made possible, in part, by the support of the regulatory authorities and industry participants.
This Standard was prepared by the Technical Committee on Well Design and Well Integrity Management, under the jurisdiction of the Strategic Steering Committee on Petroleum and Natural Gas Industry Systems, and has been formally approved by the Technical Committee.
This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Notes:
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September 2020 © 2020 Canadian Standards Association 7
CSA Z624:20
Well integrity management for petroleum and natural gas
industry systems
CSA Z624:20
0 Introduction
This Standard is intended to harmonize requirements and guidelines found across regional jurisdictions to establish one set of minimum requirements for integrity management of onshore upstream petroleum and natural gas wells throughout their life cycle from design and construction through operation, suspension, reactivation, and decommissioning.
The requirements of this Standard are considered to be adequate under conditions normally encountered in the onshore petroleum and natural gas industry. It is intended that all work performed within the scope of this Standard will meet or exceed the safety standards expressed or implied herein and that the requirements of this Standard be applied with due regard to the protection of the environment including land and water, plant and animal life. This Standard is intended to be applied in conjunction with other safety and security legislation, best practices, policies, standards and applicable codes.
It is expected that changes will be made from time to time, based on new experience and technology. Where necessary, amendments and supplements will be prepared and issued by the Technical Committee and published in accordance with CSA Group practices.
1 Scope
This Standard covers the integrity management for the life cycle of wells in the land-based upstream sector of the petroleum and natural gas industry.
1.1
The purpose of this Standard is to provide minimum requirements for ensuring well integrity, for the upstream sector of the petroleum and natural gas industry.
1.2
The Standard addresses
well integrity management framework;
design;
well construction;
operation;
intervention; and
decommission.
Note: Design will be referenced in this Standard; the details are covered in CSA Z625.
1.3
This Standard does not apply to
offshore applications;
unlicensed wells;
September 2020 © 2020 Canadian Standards Association 8