This project is based on the collaboration of four strong groups of experts in structural geology (UPS, BRGM), rock mechanics (ITES) and sedimentology (ITES + Terra Geosciences), with the goal to revisit and propose a new integrated reservoir model of the Grande Oolithe Formation (Dogger) of the Rhine Graben (Fossé Rhénan). The objective is thus sub-divided into 3 parts that correspond to elementary characterization tasks and a final work-package to synthetize the results. Seismic reflection profiles and data from wells will be used to perform fracture and fault analysis producing a 3D model at the basin-scale of the geometry of the Grande Oolithe, with emphasis on the tectonic controls on lithology and facies distribution. ES-Geothermie offers access to recent 2D seismic profiles. Samples will be collected for petrophysical and mechanical analysis in the laboratory in order to characterize the elastic properties, effective pressure laws and failure modes and their impact of fluid flow in the Grand Oolithe over the relevant range of pressure and temperature. Outcrops distributed along the basin-bounding fault offer the unique possibility to directly characterize sedimentary bodies’ geometries and to distinguish the various facies.
Figure : Fracture analysis and reservoir characterization of the Oolithe Limestones in a study case.
Porteur : Mathieu Schuster (Université de Strasbourg/CNRS), Porteur du volet géologie structurale : Antonio Benedicto
Source de financement : PROJET CIBLE N°9 : Fossé Rhénan du PEPR Sous-Sol https://www.soussol-bien-commun.fr/fr/geothermie-profonde-dans-fosse-rhenan
Personnels impliqués à GEOPS : Antonio Benedicto, Stratos Delogkos (Postdoc)
Collaboration avec : Institut Terre & Environnement de Strasbourg UMR7063 : Patrick Baud, Mathieu Schuster. Terra Géosciences, Dijon : Laurent Gindre-Chanu. BRGM : Chrystel Dezayes