Création et mise en cohérence de modèles structuraux à partir d'horizons extraits de données sismiques tridimensionnelles

INPL, Nancy, France

Abstract

The aim of the work presented in this report is to develop tools assisting geologists in the creation of structural models using a set of horizons represented by sets of points and extracted from three-dimensional seismic data. A set of algorithms is proposed enabling one to go from the horizon set of points, to a set of connected surfaces representing the horizons and the faults cutting throught them. The workflow is composed of three main parts: • The first part is dedicated to the extraction of horizon borders representing edges cut and shifted by the fault network. The horizon borders will be represented by polygonal lines. • From these polygonallines, the second part enables one to define the skeleton of the structural model. The skeleton should contain the required information not only to create horizon and fault surfaces but also to define horizon-fault and fault-fault contacts. • The third part gathers applications of the skeleton, such as the creation of juxtaposition maps on faults, displacement maps on faults and threedimensional faulted models. The algorithms proposed attempt to take into account the different cases that may occur. Each intermediate result may be edited by the geologist.

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BibTeX Reference

@PHDTHESIS{Duvinage00,
    author = { Duvinage, Isabelle },
     title = { Création et mise en cohérence de modèles structuraux à partir d'horizons extraits de données sismiques tridimensionnelles },
   chapter = { 0 },
      year = { 2000 },
    school = { INPL, Nancy, France },
  abstract = { The aim of the work presented in this report is to develop tools assisting geologists
in the creation of structural models using a set of horizons represented by sets of
points and extracted from three-dimensional seismic data. A set of algorithms is
proposed enabling one to go from the horizon set of points, to a set of connected
surfaces representing the horizons and the faults cutting throught them.
The workflow is composed of three main parts:
• The first part is dedicated to the extraction of horizon borders representing
edges cut and shifted by the fault network. The horizon borders will be
represented by polygonal lines.
• From these polygonallines, the second part enables one to define the skeleton
of the structural model. The skeleton should contain the required information
not only to create horizon and fault surfaces but also to define
horizon-fault and fault-fault contacts.
• The third part gathers applications of the skeleton, such as the creation
of juxtaposition maps on faults, displacement maps on faults and threedimensional
faulted models.
The algorithms proposed attempt to take into account the different cases that
may occur. Each intermediate result may be edited by the geologist. }
}