DFN Overview

In RS3, the Discrete Fracture Network (DFN) tool allows you to generate deterministic and statistical sets of joint planes in 3D. Supported fracture network types include parallel DFN, cross-jointed DFN, and imported DFN.

To use the DFN tool:

1. An external volume must exist in the model.
2. Define the DFN sets with the Define DFNs option under the Discrete Fracture Networks (DFNs) sub-menu from the Materials menu.
3. Add the defined DFN sets into the model using the Add a DFN option under the Discrete Fracture Networks (DFNs) sub-menu from the Materials menu.
   • DFN sets can be added to explicit DFN control volumes constructed with the Create DFN Control Volume option.
4. You can Edit DFNs if needed.
5. Use the Divide All Geometry option under the 3D Boolean sub-menu from the Geometry menu to refine the locations of joints. See the DFN and Divide All Geometry for more detail.
6. Continue with applying boundary conditions and computation using the typical options.

You can delete the DFNs with the Delete All DFNs option under the Discrete Fracture Networks (DFNs) sub-menu from the Material menu.

DFNs vs. DFN Sets

For the Define DFNs option:

• Each DFN set can contain multiple DFNs.

For the Add a DFN option:

• DFNs are added to the model as a set.
• Only one set of DFN can be added to the model at a time.