CSA Z624:20

National Standard of Canada

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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National Standard of Canada

CSA Z624:20

Well integrity management for petroleum and natural gas industry systems

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ICS 75.020

ISBN 978-1-4883-3198-5

© 2020 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA Z624:20

Well integrity management for petroleum and natural gas

industry systems

Contents

Technical Committee on Well Design and Well Integrity Management 4

Preface 7

0 Introduction 8

1. Scope 8

   
   

2. Reference publications 9

   
   

3. Definitions and abbreviations 11

   1. Definitions 11

   2. Abbreviations 13

      
      

4. Well integrity management framework 13

   1. General 14

   2. Well life cycle 14

      1. General 14

      2. Well integrity management systems 14

   3. Risk management 14

      1. General 14

      2. Risk assessment process 14

   4. Well barrier philosophy 15

      1. General 15

      2. Well barriers 15

      3. Well barrier element objectives 16

      4. Number of well barriers 16

      5. Schematics 16

   5. Well barrier element acceptance criteria 17

   6. Well barrier element verification 18

      1. General 18

      2. Pass/fail criteria 18

      3. Leak testing 18

      4. Modelling 19

   7. Well operating limits 19

   8. Reporting and documentation 20

      1. General 20

      2. Well life cycle phase deliverables 20

      3. Well handover process 20

   9. Management of change 21

   10. Lessons learned 21

       1. General 21

       2. Performance monitoring 21

          
          

5. Design 21

   
   

6. Well construction 22

   
   

   September 2020 © 2020 Canadian Standards Association 1

   CSA Z624:20

   Well integrity management for petroleum and natural gas

   industry systems

   
   

   1. General 22

   2. Drilling 22

      1. Well barrier elements during drilling 22

      2. Drilling and well control fluids 22

      3. Kick tolerance 22

      4. Casing wear and erosion 23

   3. Open hole logging 23

      1. General 23

      2. Logging 23

   4. Casing running 24

      1. Casing 24

      2. Inspection and verification 24

      3. Casing installation 25

      4. Casing cement 25

      5. Cased hole well barrier inspection and verification 26

   5. Completions 27

   6. Wellhead and tree assembly 27

      1. Installation practices 27

      2. Re-use/re-conditioning 28

   7. Documentation and records 28

      1. Well construction 28

      2. Cementing records 28

      3. Pressure test records 28

      4. Casing running records 29

      5. Casing integrity inspection records 29

      6. Wellhead and tree assembly records 29

         
         

7. Operation 29

   1. Well barrier elements 30

   2. Monitoring and inspection 30

   3. Wellsite barricades 30

   4. Suspended and shut-in wells 31

      1. Lockouts 31

      2. Shutting-in wells 31

      3. Management of change 31

   5. Annulus pressure management 31

   6. Well barrier element maintenance 31

      1. General 32

      2. Maintenance program 32

      3. Manufacturer recommendations 32

      4. Maintenance program review and update 32

   7. Management of well integrity failures 32

      1. Response to well barrier failure 32

      2. Standard operating procedures 33

      3. Maintaining mitigation measures 33

   8. Documentation and records 33

      1. Well handover 33

         
         

8. Intervention 33

   
   

   September 2020 © 2020 Canadian Standards Association 2

   CSA Z624:20

   Well integrity management for petroleum and natural gas

   industry systems

   
   

   1. Risk assessment 33

      1. General 33

      2. Standard approach 34

      3. Assessment scope 34

      4. Risk mitigation 34

   2. Well barrier element specifications 34

   3. Well intervention plan 34

   4. Well intervention plan review 34

   5. Documentation and records 34

      1. General 34

      2. Well operating limits 35

      3. Wellbore schematics 35

      4. Well barrier schematics 35

         
         

9. Decommissioning 35

   1. General 35

   2. Risk assessment 36

   3. Well barrier elements 36

      1. General 36

      2. Barriers behind casing 36

      3. Barriers inside casing 36

      4. Cut and cap 36

   4. Verification of integrity 36

      1. General 36

      2. Inside casing 36

      3. Behind casing 36

   5. Monitoring 36

   6. 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

Preface

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:

1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

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   2. relevant clause, table, and/or figure number;

   3. wording of the proposed change; and

   4. rationale for the change.

September 2020 © 2020 Canadian Standards Association 7

CSA Z624:20

Well integrity management for petroleum and natural gas

industry systems

CSA Z624:20

Well integrity management for petroleum and natural gas industry systems

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

1. well integrity management framework;

2. design;

3. well construction;

4. operation;

5. intervention; and

6. decommission.

Note: Design will be referenced in this Standard; the details are covered in CSA Z625.

1.3

This Standard does not apply to

1. offshore applications;

2. unlicensed wells;

September 2020 © 2020 Canadian Standards Association 8