Propriétés de rétention d’eau de l’argilite du Callovo-Oxfordien

Table des matières

Introduction générale
1. Contexte général: stockage dans les couches géologiques profondes
2. L’argilite du Callovo-Oxfordien
2.1. Lithologie
2.2. Minéralogie
2.3. Microstructure
3. Les éléments principaux de cette thèse
Chapitre 1. Propriétés de rétention d’eau de l’argilite du Callovo-Oxfordien
1. Introduction
2. Material and methods
2.1. The COx claystone
2.2. Experimental techniques
2.3. Microstructure investigation
2.4. Test program
3. Experimental results
3.1. Transient phases
3.2. Water retention curve
3.3. Volume changes
3.4. Mercury intrusion porosimetry
4. Discussion
4.1. Initial state
4.2. The hydration of smectites
4.3. Drying phase
4.4. Wetting phase
5. Conclusion
Acknowledgements
References
Chapitre 2. Comportement en compression-gonflement de l’argilite du Callovo-Oxfordien
Suction effects in deep Callovo-Oxfordian claystone
1. Introduction
2. Materials and methods
3. Results
4. Conclusion
References
A microstructure investigation of the compression-swelling behaviour of shales: the case of the Callovo-Oxfordian claystone
1. Introduction
2. Material and methods
2.1. The COx claystone
2.2. Sample preparation and setting
3. Experimental program
3.1. High pressure compression tests
3.2. Microstructural observations
4. High pressure compression oedometer tests
4.1. Tests T1 and T2
4.2. Tests T3 and T4
5. Microstructure investigation
5.1. Pore size distribution curves
5.2. Scanning electron microscope observations
6. Discussion
6.1. Initial state
6.2. Compression behaviour
6.3. Swelling behaviour
6.4. Compression-swelling behaviour
7. Conclusion
References
Further insight into the compression-swelling behaviour of the Callovo-Oxfordian claystone
1. Introduction
2. Materials and methods
2.1. The Callovo-Oxfordian claystone
2.2. Experimental techniques
3. The compression-swelling behaviour of the COx claystone
3.1. Compression swelling curves
3.2. Microstructure changes due to swelling
4. Phenomenological expression of the physico-chemical swelling
5. Discussion
6. Conclusion
References
Chapitre 3. Comportement thermo-mécanique de l’argilite du Callovo-Oxfordien
1. Introduction
2. The Callovo-Oxfordian claystone
2.1. Mineralogical composition
2.2. Shear strength and thermal effects in the COx claystone
3. Experimental device
3.1. Description
3.2. Preliminary resaturation procedure
3.3. Radial permeability tests
3.4. Comments on the hollow cylinder device
3.5. Experimental program
4. Experimental results
4.1. Test at 25°C
4.2. Drained heating test
4.3. Shear tests at 80°C
4.4. Failure criterion
4.5. Radial permeability tests
5. Discussion
5.1. Elastic response
5.2. Thermal volume changes
5.3. Shear strength and temperature effects
5.4. Permeability tests
6. Conclusion
References
Chapitre 4. Propriétés d’auto-colmatage de l’argilite du Callovo-Oxfordien
1. Introduction
2. Material and methods
2.1. The Callovo-Oxfordian claystone
2.2. Experimental device
2.3. Sample resaturation
2.4. Radial permeability tests
2.5. Experimental program
3. Experimental results
3.1. Initial radial permeability (point B)
3.2. Shearing under constant effective mean stress at drained conditions (path B-C)
3.3. Heating under undrained conditions (path D-E)
3.4. Isotropic drained heating of the sheared sample (F-G)
4. Discussion
5. Conclusion
References
Conclusions générale et perspectives
Référence bibliographiques