CSA Z625:16 (R2021)

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Preface

This is the first edition of CSA Z625, Well design for petroleum and natural gas industry systems.

Operators need to work with other industries, as well as governmental agencies, in order to effectively manage the design process of their energy infrastructure. Therefore, this Standard is meant to be read in conjunction with other security legislation, safety legislation, best practices, policies, standards, and applicable codes.

CSA Group acknowledges that the development of this Standard was made possible, in part, by the support of the regulatory organization and industry participants.

CSA Group acknowledges that the development of Update No. 1 was made possible, in part, by the financial support of Natural Resources Canada.

This Standard was prepared by the Technical Committee on Well Design, under the jurisdiction of the Strategic Steering Committee on Petroleum and Natural Gas Industry Systems.

Scope

1.1

This Standard covers the design of wells in the land-based sector of the energy industry. This Standard is inclusive of wellhead to final drilled depth.

1.2

This Standard addresses

a) casing, including casing design for various types of wells, including but not limited to horizontal and directional wells;

b) cementing, including cement design and centralization issues and practices; and

c) wellhead, including design, and assembly.

1.3

This Standard does not apply to

a) completion;

b) operations;

c) abandonment;

d) remedial cementing;

e) interventions;

f) suspensions;

g) competencies;

h) management system requirements;

i) drilling operations;

j) emerging technologies;

k) design tools; and

l) offshore and arctic applications.

1.4

This Standard is intended to establish essential requirements and minimum standards for the design of wells in the oil and gas industry. This Standard is not a design handbook, and competent design practice and judgment must be employed with its use.

It is not the intent of this Standard to prevent the development of new equipment or practices, nor to prescribe how such innovations should be handled.

1.5

The requirements of this Standard do not apply retroactively to existing installations or installations under construction at the time of publication, but they do apply to the extension, replacement, maintenance, and upgrading of such installations.

1.6

In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

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