Représentation, visualisation et modification de modèles volumiques pour les géoscience

Guillaume Caumon. ( 2003 )
INPL, Nancy, France

Abstract

Subsurface volume modeling has many geoscientific applications such as hydracarbon exploration and production, geotechnics or hydrogeology. This thesis concerns three of the main challenges of volume modeling: • Computer representation of solid models needs to account for complex geometries as encountered in geological formations, and to be appropriate to carry out operations on these models. • Visualization of such models has to generate usable images efficiently of the whole or part of the model. • Modification of solid models, needed in various applications, must maint ain model validity. In the first part, all three aspects above are studied for stratigraphie architecture modeling. In the second part, this thesis deals more generally with two representations capable of handling two types of geological formations. The first one is a macroscopic subsurface description using triangulated surfaces, equivalent to a true solid geological map. For this type of representation, a real-time modification method is described, as well as its main applications in geosciences. Generated from these macroscopic descriptions, three-dimensional grids make up the second general representation. Primarily used for finite elements or geostatistical computations, these grids are studied in a volume visualization perspective. Therefore, a generic visualization technique is described and declined to several types of grids. This method is convenient to explore efficiently volume data sets with several millions cells through sections, isosurfaces of direct volume rendering.

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BibTeX Reference

@PHDTHESIS{Caumon03PhD,
    author = { Caumon, Guillaume },
     title = { Représentation, visualisation et modification de modèles volumiques pour les géoscience },
     month = { "mar" },
   chapter = { 0 },
      year = { 2003 },
    school = { INPL, Nancy, France },
  abstract = { Subsurface volume modeling has many geoscientific applications such as hydracarbon
exploration and production, geotechnics or hydrogeology. This thesis
concerns three of the main challenges of volume modeling:
• Computer representation of solid models needs to account for complex geometries
as encountered in geological formations, and to be appropriate to
carry out operations on these models.
• Visualization of such models has to generate usable images efficiently of the
whole or part of the model.
• Modification of solid models, needed in various applications, must maint ain
model validity.
In the first part, all three aspects above are studied for stratigraphie architecture
modeling.
In the second part, this thesis deals more generally with two representations
capable of handling two types of geological formations. The first one is a macroscopic
subsurface description using triangulated surfaces, equivalent to a true
solid geological map. For this type of representation, a real-time modification
method is described, as well as its main applications in geosciences.
Generated from these macroscopic descriptions, three-dimensional grids make
up the second general representation. Primarily used for finite elements or geostatistical
computations, these grids are studied in a volume visualization perspective.
Therefore, a generic visualization technique is described and declined
to several types of grids. This method is convenient to explore efficiently volume
data sets with several millions cells through sections, isosurfaces of direct volume
rendering. }
}