Method for generating a hex-dominant mesh of a geometrically complex basin

Longmin Ran (1) , Abdallah Benali (1) , Houman Borouchaki (2, 3) , Chakib Bennis (1)

1 IFPEN - IFP Energies nouvelles
2 Gamma3 - Automatic mesh generation and advanced methods
3 UTT - Université de Technologie de Troyes

- Method for generating a mesh of an underground environment comprising at least one sedimentary layer traversed by at least one fault. Since the layer is delimited vertically by two geological horizons discretized by two triangulated three-dimensional surfaces, a three-dimensional grid surface is constructed for each horizon by means of an isometric unfolding technique taking into account the presence of a fault. Then, the mesh of the underground environment is generated by generating cells by creating links between the three-dimensional grid surfaces. To do this, nodes of the first gridded surface located on one side of the fault different from that of a node of the second gridded surface having the same coordinates i, j are detected. Each non-detected node is connected to a node of the second grid surface having the same coordinates i, j, and each detected node is connected to the fault by considering a direction of a neighboring node. Finally, cells with at least two vertices are regularized.

Domaines: Modélisation et simulation

Longmin Ran, Abdallah Benali, Houman Borouchaki, Chakib Bennis. Method for generating a hex-dominant mesh of a geometrically complex basin. Unknown Region, Patent n° : EP2407934. 2012. ⟨hal-02562390⟩