ruiu smallDate: June 9th 2015, 2:30pm, Salle Gallé (Présidence, Brabois)

TopicModeling of sedimentary structures and application to simulation and image analysis.

AbstractMost clastic deposits consist in geometric arrangements of several structures. The purpose of this work is to provide a volumetric representation of these objects in order to reproduce the  high heterogeneity of the sedimentary deposits. These models are constructed to be flexible and compact  in order to model the sedimentary formations at different scales. The sedimentary models are defined  by a boundary representation ; each boundary is defined by a deformable parametric surface. The proposed parametrization is the Non Uniform Rational B-Spline (NURBS). Each elementary shape is controlled by deformation rules and has connection constraints with associated objects, in order to maintain the geometry and the consistency through editing. Sedimentary structure models are applied to channel simulation and to the construction of the related structures such as point bars. These structures are then used as framework for petrophysical property simulations. The models are also applied to semi-automatically interpret geological images by adapting classical shape extraction methods. This approach is applied on satellite pictures showing alluvial channels and some preliminary results on 3D seismic time slices are also presented.

PhD Committee members: Isabelle Cojan (Mines Paris Tech), Brigitte Doligez (IFPEN), Marie-Odile Berger (INRIA Nancy Grand Est), Gérard Massonnat (Total), Yves Géraud (Univ. Lorraine).

PhD advisors: Guillaume Caumon and Sophie Viseur (CEREGE)

After his defense Jeremy Ruiu will be begining a postdoc with Total and Université de Pau.