Chemo-poro-elastoplastic modelling of an oilwell cement paste: Macroscopic shrinkage and stress-strain behaviour

Agofack, Nicolaine; Ghabezloo, Siavash; Sulem, Jean

doi:10.1016/j.cemconres.2020.106046

Cited by 11 publications

(2 citation statements)

References 29 publications

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“…They can be introduced in relations ( 17) to ( 21) for further simplifications. The variations of porosity and of volumetric strain presented in relations ( 6) and ( 21 47) and ( 48) are the usual equations found for volumetric strain and porosity variation for isotropic materials (Zimmerman et al 1986;Ghabezloo 2011;Agofack et al 2020). ( 44)…”

Section: Isotropic Materialsmentioning

confidence: 99%

Thermo-Poromechanical Properties of Pierre II Shale

et al. 2022

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During the injection of carbon dioxide (CO2) for CO2 capture and storage (CCS) operations, the near-well (including casing, cement, and rock around it) can undergo several thermal loadings. These loadings can significantly increase or decrease the pore pressure and can thus lead to mechanical failure of the cement sheath and rock formation. When these failures appear in the caprock, they can compromise the integrity of the storage site. The understanding of thermo-mechanical behaviour of a potential caprock shale is, therefore, of great importance for the success of CCS operations. In this paper, experiments were performed on Pierre II shale, under confining and initial pore pressures comparable to field conditions. A 60 °C loading amplitude (between 30 and 90 °C) was applied on the shale material both under undrained and drained conditions. The results, analysed within the framework of anisotropic thermo-poro-elasticity, highlight the anisotropic behaviour of the thermal expansion coefficients, as well as of the Skempton coefficient. The thermal pressurization coefficient was also evaluated and showed a potential pore pressure change as high as 0.11 MPa/°C.

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Section: Isotropic Materialsmentioning

confidence: 99%

Thermo-Poromechanical Properties of Pierre II Shale

et al. 2022

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“…[14] showed a chemo-poroelastoplastic model capable of predicting the initial stresses on cement, as well as the possible origin of micro annuli during cement dehydration under different temperature and pressure conditions. [15] used a 3D FE model to develop sensitivity plots for design and operation parameters, such as cement properties, wellbore pressure and annulus pressure; and [16] conducted finite elements analyses to evaluate the critical variables in the origin of failure caused by debonding on the interfaces and formation of micro annuli.…”

Section: Reference Frameworkmentioning

confidence: 99%

Numerical modeling to evaluate tensile mechanical and shear failure of cement in the casing-cement interface

Mayorga-Ribero

Gambús-Ordaz

Palencia-Muñoz

et al. 2022

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This paper presents a numerical model of an integrated 3D casing-cement-formation system, to evaluate the mechanical tensile and shear failure of the cement at the casing-cement interface as the pressure and temperature conditions of the formation and borehole vary during production. The model which includes the formation pressure, unlike others proposed, was developed by stages under finite element discretization and compared to analytical models. Results show that increasing the formation temperature increases the probability of tensile and shear failure in the cement, while increasing the wellbore temperature decreases these probabilities. On the other hand, the decrease in the well pressure reduces the probability of shear failure and increases the tensile failure. In the case of formation pressure, the opposite occurs.

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