Assessing multiscale Discrete Fracture Network flow with graphs - INSU - Institut national des sciences de l'Univers Access content directly
Conference Papers Year : 2021

Assessing multiscale Discrete Fracture Network flow with graphs

Diane Doolaeghe
  • Function : Author
  • PersonId : 1103725
Philippe Davy
Romain Le Goc
  • Function : Author


evaluate the use of graphs as a fast and relevant substitute to DFNs. Graphs reduce the DFNs’ complexity to their connectivity structure by forming an assembly of nodes connected by edges, to which physical properties, like a conductance, can be assigned. Both the graph architecture (either fracture- or intersection- based) and the edge conductance definition, have an impact on the estimation of flow and transport parameters. The intersection graph brings a reliable description of the flow connectivity but with edge redundancy in fractures with a large number of intersections. As a consequence, the expression of the edge conductances should depend on the number of intersections in the fracture plane. We first introduce some of our previous work which propose a reliable expression of the edge conductance in the case of a pair of intersections. For the intersection graph, a correction on the conductance expression is proposed for fractures with a large number of intersections. Both graphs provide very good estimate of the bulk permeability although they tend to slightly overestimate it when the DFN connectivity increases (~×2) certainly due to fractures with large intersection numbers. We address this issue by analyzing flow simulations on a fracture with multiple intersections. We also propose another way to correct the intersection graph, which consists in removing redundant edges. The method drastically simplifies the intersection graph, which is promising in term of computational time. The bulk permeability is overestimated by a factor of 2.3 but independently of the DFN density and connectivity.
Fichier principal
Vignette du fichier
DFNE_2021_Graphs_Doolaeghe.pdf (1.13 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

insu-03326686 , version 1 (09-09-2021)


  • HAL Id : insu-03326686 , version 1


Diane Doolaeghe, Philippe Davy, Caroline Darcel, Romain Le Goc, Jeffrey De'Haven Hyman. Assessing multiscale Discrete Fracture Network flow with graphs. 55th US Rock Mechanics/Geomechanics Symposium., American Rock Mechanics Association (ARMA), Jun 2021, online, United States. ⟨insu-03326686⟩
31 View
8 Download


Gmail Facebook Twitter LinkedIn More