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19 results on '"Chavez Panduro, Elvia A."'

6. Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions

Author

Chavez Panduro, Elvia A., primary, Cordonnier, Benoît, additional, Gawel, Kamila, additional, Børve, Ingrid, additional, Iyer, Jaisree, additional, Carroll, Susan A., additional, Michels, Leander, additional, Rogowska, Melania, additional, McBeck, Jessica Ann, additional, Sørensen, Henning Osholm, additional, Walsh, Stuart D. C., additional, Renard, François, additional, Gibaud, Alain, additional, Torsæter, Malin, additional, and Breiby, Dag W., additional

Published
2020
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7. Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions

Author

Chavez Panduro, Elvia A., Cordonnier, Benoît, Gawel, Kamila, Børve, Ingrid, Iyer, Jaisree, Carroll, Susan A., Michels, Leander, Rogowska, Melania, McBeck, Jessica Ann, Sørensen, Henning Osholm, Walsh, Stuart D.C., Renard, François, Gibaud, Alain, Torsæter, Malin, Breiby, Dag W., Chavez Panduro, Elvia A., Cordonnier, Benoît, Gawel, Kamila, Børve, Ingrid, Iyer, Jaisree, Carroll, Susan A., Michels, Leander, Rogowska, Melania, McBeck, Jessica Ann, Sørensen, Henning Osholm, Walsh, Stuart D.C., Renard, François, Gibaud, Alain, Torsæter, Malin, and Breiby, Dag W.

Abstract

Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, CO2 is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation and dissolution. By switching between flow and nonflow conditions of CO2-saturated water through cement, we were able to delineate regimes dominated by calcium carbonate precipitation and dissolution. For the first time, we demonstrate experimentally the impact of the flow history on CO2 leakage risk for cement plugging. In-situ μ-CT experiments combined with geochemical modeling provide unique insight into the interactions between CO2 and cement, potentially helping in assessing the risks of CO2 storage in geological reservoirs.

Published
2020

10. Real Time 3D Observations of Portland Cement Carbonation at CO2Storage Conditions

Author

Chavez Panduro, Elvia A., Cordonnier, Benoît, Gawel, Kamila, Børve, Ingrid, Iyer, Jaisree, Carroll, Susan A., Michels, Leander, Rogowska, Melania, McBeck, Jessica Ann, Sørensen, Henning Osholm, Walsh, Stuart D. C., Renard, François, Gibaud, Alain, Torsæter, Malin, and Breiby, Dag W.

Abstract

Depleted oil reservoirs are considered a viable solution to the global challenge of CO2storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, CO2is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation and dissolution. By switching between flow and nonflow conditions of CO2-saturated water through cement, we were able to delineate regimes dominated by calcium carbonate precipitation and dissolution. For the first time, we demonstrate experimentally the impact of the flow history on CO2leakage risk for cement plugging. In-situ μ-CT experiments combined with geochemical modeling provide unique insight into the interactions between CO2and cement, potentially helping in assessing the risks of CO2storage in geological reservoirs.

Published
2020
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12. X-Ray Nanoscopy of a Bulk Heterojunction

Author

Patil, Nilesh, primary, Skjønsfjell, Eirik Torbjørn Bakken, additional, Van den Brande, Niko, additional, Chavez Panduro, Elvia Anabela, additional, Claessens, Raf, additional, Guizar-Sicairos, Manuel, additional, Van Mele, Bruno, additional, and Breiby, Dag Werner, additional

Published
2016
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13. Synchrotron Nano-scale X-ray studies of Materials in CO2 environment

Author

Chavez Panduro, Elvia Anabela, STAR, ABES, Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Université du Maine, Alain Gibaud, Oleg Konovalov, and Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
X-ray, [SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT], Polystyrène, Silice mésoporeuse, [SDV.OT] Life Sciences [q-bio]/Other [q-bio.OT], Couche mince, SAXS, XRR, CaCO3, GISAXS, Synchrotron
Abstract

The work that is presented in this manuscript is the result of a series of experiments that were performed both at the Université du Maine (IMMM Le Mans) and at the ID10 and ID02 beam lines of the ESRF (Grenoble) where I have equally spent half of my time. The project I have been working on for three years was mostly oriented on the study by means of X-ray scattering probes of nanomaterials that were exposed to supercritical CO2. As a result another part of this work will be also dedicated to describing the properties of this supercritical fluid and how it interacts with materials such as polymers for instance. The analyzed materials were thin film and small island of polystyrene, then materials mesostructures using fluoro-surfactants and finally calcium carbonate. Due to the nanoscale of these materials, the X-ray probes that were extensively used in this work were Small Angle X-ray scattering (SAXS), Grazing Incidence Small Angle X-ray Scattering (GISAXS) and X-ray Reflectivity (XRR)., Le travail qui est présenté dans ce manuscrit est le résultat d'une série d'expériences qui ont été effectuées à la fois à l'Université du Maine (IMMM Le Mans) et aux lignes de lumière lD10 et lD02 de l'ESRF (Grenoble) où j'ai passé la moitié de mon temps. Le projet que j'ai travaillé pendant trois ans a été principalement orienté sur l'étude des nanomatériaux qui ont été exposés au CO2 supercritique en utilisant de diffusion des rayons X. Par conséquent une partie de ce travail a été consacrée à la description des propriétés de ce fluide supercritique et comment il interagit avec des matériaux tels que les polymères par exemple. Les matériaux analysés ont été le polystyrène sous forme de film et des ilots, ensuite des matériaux meso-structures avec des tensioactifs fluorés et finalement le carbonate de calcium. Due à la taille nanométrique de tous ces matériaux, les techniques de rayons X qui ont été largement utilisés dans ce travail étaient Small angle X-ray scattering (SAXS), Grazing Small angle X-ray scattering ( (GISAXS) et X-ray reflectivity (XRR).

Published
2014

15. Mesostructured alumina as powders and thin films

Author

Voss, Georg J. B., primary, Chavez Panduro, Elvia A., additional, Midttveit, Anette, additional, Fløystad, Jostein B., additional, Høydalsvik, Kristin, additional, Gibaud, Alain, additional, Breiby, Dag W., additional, and Rønning, Magnus, additional

Published
2014
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17. Small-angle X-ray scattering analysis of porous powders of CaCO3.

Author

Chavez Panduro, Elvia Anabela, Beuvier, Thomas, Fernández Martínez, Manuel, Hassani, Leila, Calvignac, Brice, Boury, Frank, and Gibaud, Alain

Subjects
*POROUS materials, *CALCIUM carbonate, *X-ray scattering, *SURFACE area, *NITROGEN absorption & adsorption, *COMPARATIVE studies
Abstract

The results of small-angle and ultra-small-angle X-ray scattering on porous CaCO3 microparticles of pulverulent vaterite made by a conventional chemical route and by using supercritical CO2 are presented. The scattering curves are analysed in the framework of the Guinier-Porod model, which gives the radii of gyration of the scattering objects and their fractal dimension. In addition, the porosity and the specific surface area are determined by using the Porod invariant, which is modified to take into account the effective thickness of the pellet. The results of this analysis are compared with those obtained by nitrogen adsorption. [ABSTRACT FROM AUTHOR]

Published
2012
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18. Small-angle X-ray scattering analysis of porous powders of CaCO3.

Author

Chavez Panduro, Elvia Anabela, Beuvier, Thomas, Fernández Martínez, Manuel, Hassani, Leila, Calvignac, Brice, Boury, Frank, and Gibaud, Alain

Subjects
POROUS materials, CALCIUM carbonate, X-ray scattering, SURFACE area, NITROGEN absorption & adsorption, COMPARATIVE studies
Abstract

The results of small-angle and ultra-small-angle X-ray scattering on porous CaCO3 microparticles of pulverulent vaterite made by a conventional chemical route and by using supercritical CO2 are presented. The scattering curves are analysed in the framework of the Guinier-Porod model, which gives the radii of gyration of the scattering objects and their fractal dimension. In addition, the porosity and the specific surface area are determined by using the Porod invariant, which is modified to take into account the effective thickness of the pellet. The results of this analysis are compared with those obtained by nitrogen adsorption. [ABSTRACT FROM AUTHOR]

Published
2012
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19. Real Time 3D Observations of Portland Cement Carbonation at CO 2 Storage Conditions.

Author

Chavez Panduro EA, Cordonnier B, Gawel K, Børve I, Iyer J, Carroll SA, Michels L, Rogowska M, McBeck JA, Sørensen HO, Walsh SDC, Renard F, Gibaud A, Torsæter M, and Breiby DW

Subjects
Construction Materials, Water, X-Ray Microtomography, Carbon Dioxide, Carbonates
Abstract

Depleted oil reservoirs are considered a viable solution to the global challenge of CO 2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO 2 . Under reservoir conditions, CO 2 is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation and dissolution. By switching between flow and nonflow conditions of CO 2 -saturated water through cement, we were able to delineate regimes dominated by calcium carbonate precipitation and dissolution. For the first time, we demonstrate experimentally the impact of the flow history on CO 2 leakage risk for cement plugging. In-situ μ-CT experiments combined with geochemical modeling provide unique insight into the interactions between CO 2 and cement, potentially helping in assessing the risks of CO 2 storage in geological reservoirs.

Published
2020
Full Text
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