Local and sequential fracture insertion in 2D structural models

Priscillia Labourg and Capucine Legentil and Mustapha Zakari and Guillaume Caumon. ( 2021 )
in: 2021 RING Meeting, ASGA

Abstract

Local Geomodel updating is important in subsurface studies to avoid the cost of a complete model rebuilding when new information becomes available, or when an interpretation changes. To support such updating, this article presents a workflow to insert a fracture into an existing triangular 2D mesh already conforming to some geological boundaries. This work uses the MMG2D library to insert a bounded implicit line into the mesh which maintaining conformity to the other interfaces. Fractures defined explicitly by points are first converted to a scalar field. As fractures do not necessarily terminate against pre-existing boundaries, the fracture insertion is restricted to a mesh subset computed from the fracture size. The zone to be re-meshed is defined by several rows of triangles around the fracture to preserve the mesh quality during the insertion. Several geometrical configurations of fracture insertion in a mesh are presented and show the robustness of the proposed fracturing operator.  

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BibTeX Reference

@INPROCEEDINGS{LABOURG_RM2021a,
    author = { Labourg, Priscillia and Legentil, Capucine and Zakari, Mustapha and Caumon, Guillaume },
     title = { Local and sequential fracture insertion in 2D structural models },
 booktitle = { 2021 RING Meeting },
      year = { 2021 },
 publisher = { ASGA },
  abstract = { Local Geomodel updating is important in subsurface studies to avoid the cost of a complete model rebuilding when new information becomes available, or when an interpretation changes. To support such updating, this article presents a workflow to insert a fracture into an existing triangular 2D mesh already conforming to some geological boundaries. This work uses the MMG2D library to insert a bounded implicit line into the mesh which maintaining conformity to the other interfaces. Fractures defined explicitly by points are first converted to a scalar field. As fractures do not necessarily terminate against pre-existing boundaries, the fracture insertion is restricted to a mesh subset computed from the fracture size. The zone to be re-meshed is defined by several rows of triangles around the fracture to preserve the mesh quality during the insertion. Several geometrical configurations of fracture insertion in a mesh are presented and show the robustness of the proposed fracturing operator.   }
}