Modeling the corrosion of steel casing and the damage of well cement in a borehole system

Li, Linfei; Hubler, Mija H.; Xi, Yunping

doi:10.1016/j.conbuildmat.2020.119701

Modeling the corrosion of steel casing and the damage of well cement in a borehole system

Journal Article · Thu Jun 18 00:00:00 EDT 2020 · Construction and Building Materials

DOI:https://doi.org/10.1016/j.conbuildmat.2020.119701· OSTI ID:1849176

Li, Linfei ^[1]; Hubler, Mija H. ^[2]; Xi, Yunping ^[2]

Univ. of Colorado, Boulder, CO (United States). Dept. of Civil and Environmental Engineering; Univ. of Colorado, Boulder, CO (United States)
Univ. of Colorado, Boulder, CO (United States). Dept. of Civil and Environmental Engineering

This work presents the effect of chloride-induced corrosion in an underground borehole system, specifically considering the steel casing and further damage to the surrounding cement. In the past four decades, oil well cement has been successfully used for underground construction. However, high concentrations of chloride ions gradually degrade the functionality and durability of well cement. Gasses and liquids can leak from deterioration caused by chloride ions, and thus motivate this study. The chemo-mechanical coupling diffusion model and a classical fracture mechanics model are applied. The model is validated with OPC concrete corrosion data from literature, and then applied to well cement using experimentally obtained material property data. The time when crack initiation, peak pressure, and complete fracture is reached in the model of the cement sheath provides a quantification of the expected service life of the borehole system.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE)

Grant/Contract Number:: FE0026514

OSTI ID:: 1849176

Alternate ID(s):: OSTI ID: 1633840

Journal Information:: Construction and Building Materials, Journal Name: Construction and Building Materials Journal Issue: C Vol. 259; ISSN 0950-0618

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
42 ENGINEERING
Chloride diffusion
Construction & building technology
Corrosion
Crack propagation
Engineering
Materials Science
Well cement

Modeling the corrosion of steel casing and the damage of well cement in a borehole system

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