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Relations plissement/fracturation multi échelle dans les multicouches sédimentaires du domaine élastique/fragile :Accommodation discontinue de la courbure par la fracturation de petite échelle et par les articulations. Possibles implications dynamiques dans les écoulements des réservoirs

Abstract : This PhD Thesis deals with the relationship existing between folds and fractures formed within the shallow crust, i.e., in the domain of essentially elastic/brittle strain. This problem is tackled from both academic and applied aspects, especially exploration and production of natural fractured reservoir.
The main results of this work are the following:
- An original classification of fold and fracture relationship is proposed on the basis of comparative field studies. Kinematics and mechanical origins of the different observed associations are discussed and some possible implications concerning fluid dynamics in folded/fractured reservoirs are proposed.
- The pre-eminent role of fracture zones called articulations on fold curvature accommodation is shown by numerous field studies. A typology of these fold related fracture zones is established on the basis of field examples and their mechanical origin is discussed. An analogical modelling procedure (with paraffin multilayers) is exposed and show the influence of some important parameters as the vertical load imposed during folding and the interlayer friction on the formation and distribution of articulations. The role of the distribution of articulation on fold geometrical evolution is also tackled.
- A case study integrating these concepts and results is proposed dealing with the Majella Anticline (Italy) which is an analogue of fractured reservoir.
- Some implications of these results for fluid flow within folded and fractured reservoirs are exposed and discussed.
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Submitted on : Wednesday, January 5, 2005 - 4:11:59 PM
Last modification on : Tuesday, February 19, 2019 - 4:54:10 PM
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Loic Bazalgette. Relations plissement/fracturation multi échelle dans les multicouches sédimentaires du domaine élastique/fragile :Accommodation discontinue de la courbure par la fracturation de petite échelle et par les articulations. Possibles implications dynamiques dans les écoulements des réservoirs. Tectonique. Université Montpellier II - Sciences et Techniques du Languedoc, 2004. Français. ⟨tel-00007923⟩

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