Horizons -> 3D Mesh

The following steps illustrate how to use the Horizons method to create 3D Mesh stratigraphy.

1. Create/Import Inputs

2. Assign Horizon IDs

3. Create Primary 2D Mesh

   A 2D mesh is needed to be used as a projection for the resulting 3D mesh. A 2D mesh or a meshing  coverage needs to be created and selected as the primary mesh

   The 2D mesh defines the boundary of the 3D Mesh. Also, the meshing options assigned to primary coverage controls the elements of the 3D Mesh that is created.

    

    

4. Setup additional optional inputs

5. Execute the Horizons command

   1. Select the Horizons->3D Mesh command in the Borehole or TIN menu.

   2. Set up the options and inputs in the Horizons Wizard.

   3. Select Finish in the wizard to create the solids.

    

Horizon -> 3D Mesh Algorithm

When the Horizon command is executed the horizons specified on the borehole contacts or TIN nodes are converted to a set of scatter points with one data set for each horizon. The scatter points are then used to interpolate a surface for each horizon.  Starting with the lowest numbered horizon, the surface is extruded down to create a set of elements in a 3D Mesh.  The surface corresponding to the next horizon is then extruded down to fill in the space between that surface and the previous surface.  This process is repeated for each surface.  At each step, a set of elements are created for the current horizon and all previously defined elements are subtracted from that layer, resulting in an incremental buildup of the stratigraphy from the bottom to the top. The entire process results in a 3D Mesh with each horizon layer represented by a Material Zone.

TINs used to create 3D Mesh below

3D Mesh created via the horizons method