Repair and simplification of 2D geological models : strategy based on prior topological and geometrical analysis and first results

in: 2017 Ring Meeting, pages 1--16, ASGA

Abstract

In this paper we introduce a strategy to repair and simplify 2D geological models. Our new strategy is based on the definition of zones around input model lines and corners. These zones are used for (1) detecting areas in the model where modifications are required and (2) restricting model entity displacements. Output models respect given validity criteria on the model topology and model geometry, especially on minimum admissible angles and minimum admissible local entity sizes. Two approaches are defined depending on whether the model topology is modified or not. The constant topology approach simplifies the model geometry by deforming model entities to enlarge small angles and small features. The non constant topology approach can be used for both repairing model topology and simplifying the model geometry by small feature removal. This approach is based on a prior analysis of model entity zone intersections to define the edited topology. The geometry of the edited model is then generated in a second time. In this paper we present theoretical concepts of our repairing and simplifying strategy and early developments on the non constant topology approach applied on 2D geological models such as cross-sections and map-view models.

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BibTeX Reference

@INPROCEEDINGS{Anquez2017,
    author = { Anquez, Pierre and Caumon, Guillaume and Pellerin, Jeanne and Levy, Bruno },
     title = { Repair and simplification of 2D geological models : strategy based on prior topological and geometrical analysis and first results },
 booktitle = { 2017 Ring Meeting },
    number = { 1998 },
      year = { 2017 },
     pages = { 1--16 },
 publisher = { ASGA },
  abstract = { In this paper we introduce a strategy to repair and simplify 2D geological models. Our new strategy is based on the definition of zones around input model lines and corners. These zones are used for (1) detecting areas in the model where modifications are required and (2) restricting model entity displacements. Output models respect given validity criteria on the model topology and model geometry, especially on minimum admissible angles and minimum admissible local entity sizes. Two approaches are defined depending on whether the model topology is modified or not. The constant topology approach simplifies the model geometry by deforming model entities to enlarge small angles and small features. The non constant topology approach can be used for both repairing model topology and simplifying the model geometry by small feature removal. This approach is based on a prior analysis of model entity zone intersections to define the edited topology. The geometry of the edited model is then generated in a second time. In this paper we present theoretical concepts of our repairing and simplifying strategy and early developments on the non constant topology approach applied on 2D geological models such as cross-sections and map-view models. }
}