Overview
EN ISO 10426-5:2024 / ISO 10426-5:2024 - Oil and gas industries including lower carbon energy - Cements and materials for well cementing - Part 5: Determination of shrinkage and expansion of well cement formulations.
This standard specifies laboratory methods to measure dimensional changes of well cement slurries during curing (cement hydration) at atmospheric and elevated pressure, and to assess the stress generated by expansion when cement is confined at elevated temperature and pressure.
Key topics and technical requirements
- Scope and purpose: Methods for determining shrinkage and expansion of well cement formulations to support performance evaluation and quality control.
- Test methods included:
- Annular ring test (free access to water, atmospheric pressure) - apparatus (mould, water curing bath, temperature control, consistometer, micrometer) and procedural steps (mould preparation, slurry mixing, filling, curing, measurement and calculations).
- Annular ring test (impermeable condition, atmospheric pressure) - using a re-sealable bag to simulate impermeable containment.
- Membrane test (bulk shrinkage/expansion, impermeable condition, atmospheric pressure) - uses a membrane, scales and controlled curing to measure bulk volume change.
- Informative annexes: method for determining stress generated by expansion under confined conditions at elevated temperature and pressure, and annular ring testing at elevated pressure.
- Apparatus and measurement: Describes required moulds, curing baths, temperature-measuring systems, consistometer, micrometer and electronic scales; and outlines measurement and calculation principles.
- Documentation: Test periods, sample preparation, and calculation procedures are specified to ensure repeatability and comparability.
Applications
- Evaluate dimensional stability of well cement formulations to reduce risks of microannuli, loss of zonal isolation and casing damage.
- Compare effects of additives and low-carbon cement blends on shrinkage/expansion behavior.
- Quality control in cement manufacturing and on-site slurry verification during drilling and completion.
- Research and development for new well cement systems used in conventional and lower carbon energy wells (e.g., CO2 management, geothermal).
Who should use this standard
- Cement and additive manufacturers
- Well cementing service companies and engineers
- Petroleum/geothermal lab technicians and QC laboratories
- R&D teams and regulatory bodies evaluating well integrity
Related standards
- Other parts of the ISO 10426 series (well cementing materials and test methods).
- Developed by ISO/TC 67 (Oil and gas industries including lower carbon energy) and endorsed as EN ISO 10426-5:2024.
Keywords: ISO 10426-5:2024, EN ISO 10426-5:2024, well cementing, shrinkage and expansion, annular ring test, membrane test, elevated pressure, cement formulations, oil and gas industries.
