Experimental and theoretical study of the restrained shrinkage cracking of early age well cement
Abstract
The shrinkage cracking occurring in oil & gas well cement material is a major factor that reduces the cement sheath integrity and impairs the durability of an underground well. Shrinkage mainly takes place in the early hydration period of the cement, and the resulting restrained shrinkage cracking can form a leaking network for oil & gas or carbon dioxide stored in an underground reservoir. It is thus important to understand the early age behavior of well cement and the leaking pathway formation in the well. This study describes the application of the digital image correlation (DIC) method as a tool to measure the strain development and crack distributions of well cement in the lab during early phase changes. A theoretical model is presented to calculate the stress distribution built up in the cement sheath during early ages of well cement hydration, which helps to interpret the experimental observations and determine the major factors influencing the cracking sequences. This study presents the whole hydration – drying shrinkage – and cracking mechanism of early age well cement under restrained ring conditions experimentally and theoretically. Finally, the results offer useful insights on the key material and geometric parameters which control the fracture ofmore »
- Authors:
-
- Univ. of Colorado, Boulder, CO (United States)
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1849177
- Alternate Identifier(s):
- OSTI ID: 1765445
- Grant/Contract Number:
- FE0026514
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Construction and Building Materials
- Additional Journal Information:
- Journal Volume: 262; Journal Issue: C; Journal ID: ISSN 0950-0618
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; Construction & Building Technology; Engineering; Materials Science; Well Cementing; Shrinkage; Cracking; Digital Image Correlation (DIC); Restrained Ring Test
Citation Formats
Zhang, Yige, Li, Linfei, Xi, Yunping, and Hubler, Mija. Experimental and theoretical study of the restrained shrinkage cracking of early age well cement. United States: N. p., 2020.
Web. doi:10.1016/j.conbuildmat.2020.120368.
Zhang, Yige, Li, Linfei, Xi, Yunping, & Hubler, Mija. Experimental and theoretical study of the restrained shrinkage cracking of early age well cement. United States. https://doi.org/10.1016/j.conbuildmat.2020.120368
Zhang, Yige, Li, Linfei, Xi, Yunping, and Hubler, Mija. Tue .
"Experimental and theoretical study of the restrained shrinkage cracking of early age well cement". United States. https://doi.org/10.1016/j.conbuildmat.2020.120368. https://www.osti.gov/servlets/purl/1849177.
@article{osti_1849177,
title = {Experimental and theoretical study of the restrained shrinkage cracking of early age well cement},
author = {Zhang, Yige and Li, Linfei and Xi, Yunping and Hubler, Mija},
abstractNote = {The shrinkage cracking occurring in oil & gas well cement material is a major factor that reduces the cement sheath integrity and impairs the durability of an underground well. Shrinkage mainly takes place in the early hydration period of the cement, and the resulting restrained shrinkage cracking can form a leaking network for oil & gas or carbon dioxide stored in an underground reservoir. It is thus important to understand the early age behavior of well cement and the leaking pathway formation in the well. This study describes the application of the digital image correlation (DIC) method as a tool to measure the strain development and crack distributions of well cement in the lab during early phase changes. A theoretical model is presented to calculate the stress distribution built up in the cement sheath during early ages of well cement hydration, which helps to interpret the experimental observations and determine the major factors influencing the cracking sequences. This study presents the whole hydration – drying shrinkage – and cracking mechanism of early age well cement under restrained ring conditions experimentally and theoretically. Finally, the results offer useful insights on the key material and geometric parameters which control the fracture of a well cementing structure.},
doi = {10.1016/j.conbuildmat.2020.120368},
journal = {Construction and Building Materials},
number = C,
volume = 262,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2020},
month = {Tue Sep 01 00:00:00 EDT 2020}
}
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