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Nonlinear Stress-Strain Model for Confined Well Cement
The cement sheath is the key for providing the zonal isolation and integrity of the wellbore. Oil well cement works under confining pressure, so it exhibits strong nonlinear and ductile behavior which is very different from that without confining pressure. Therefore, for the accuracy of the simulati...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6719979/ https://www.ncbi.nlm.nih.gov/pubmed/31426554 http://dx.doi.org/10.3390/ma12162626 |
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author | Li, Yan Lu, Yunhu Ahmed, Ramadan Han, Baoguo Jin, Yan |
author_facet | Li, Yan Lu, Yunhu Ahmed, Ramadan Han, Baoguo Jin, Yan |
author_sort | Li, Yan |
collection | PubMed |
description | The cement sheath is the key for providing the zonal isolation and integrity of the wellbore. Oil well cement works under confining pressure, so it exhibits strong nonlinear and ductile behavior which is very different from that without confining pressure. Therefore, for the accuracy of the simulation and the reliability of well construction design, a reliable compression stress–strain model is essential for confined well cement. In this paper, a new axial stress–strain model for confined well cement is developed based on uniaxial and triaxial test data, examinations of failure mechanisms, and the results of numerical analysis. A parametric study was conducted to evaluate and calibrate the model. The model is simple and suitable for direct use in simulation studies and well design. Results from this study show the nonlinear compressive behavior of confined well cement can be predicted using the traditional uniaxial compressive strength test measurements. |
format | Online Article Text |
id | pubmed-6719979 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-67199792019-09-10 Nonlinear Stress-Strain Model for Confined Well Cement Li, Yan Lu, Yunhu Ahmed, Ramadan Han, Baoguo Jin, Yan Materials (Basel) Article The cement sheath is the key for providing the zonal isolation and integrity of the wellbore. Oil well cement works under confining pressure, so it exhibits strong nonlinear and ductile behavior which is very different from that without confining pressure. Therefore, for the accuracy of the simulation and the reliability of well construction design, a reliable compression stress–strain model is essential for confined well cement. In this paper, a new axial stress–strain model for confined well cement is developed based on uniaxial and triaxial test data, examinations of failure mechanisms, and the results of numerical analysis. A parametric study was conducted to evaluate and calibrate the model. The model is simple and suitable for direct use in simulation studies and well design. Results from this study show the nonlinear compressive behavior of confined well cement can be predicted using the traditional uniaxial compressive strength test measurements. MDPI 2019-08-17 /pmc/articles/PMC6719979/ /pubmed/31426554 http://dx.doi.org/10.3390/ma12162626 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Yan Lu, Yunhu Ahmed, Ramadan Han, Baoguo Jin, Yan Nonlinear Stress-Strain Model for Confined Well Cement |
title | Nonlinear Stress-Strain Model for Confined Well Cement |
title_full | Nonlinear Stress-Strain Model for Confined Well Cement |
title_fullStr | Nonlinear Stress-Strain Model for Confined Well Cement |
title_full_unstemmed | Nonlinear Stress-Strain Model for Confined Well Cement |
title_short | Nonlinear Stress-Strain Model for Confined Well Cement |
title_sort | nonlinear stress-strain model for confined well cement |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6719979/ https://www.ncbi.nlm.nih.gov/pubmed/31426554 http://dx.doi.org/10.3390/ma12162626 |
work_keys_str_mv | AT liyan nonlinearstressstrainmodelforconfinedwellcement AT luyunhu nonlinearstressstrainmodelforconfinedwellcement AT ahmedramadan nonlinearstressstrainmodelforconfinedwellcement AT hanbaoguo nonlinearstressstrainmodelforconfinedwellcement AT jinyan nonlinearstressstrainmodelforconfinedwellcement |