ResInsight/docs/Faults.md

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Faults are organized in a folder named Faults. Overall settings can be controlled from the Faults item in the Project Tree.

Fault Names and NNC

Import of Fault info from *.DATA-files

If enabled in Preferences, ResInsight will import fault information from the *.DATA files and use this information to group the detected faces into named items. The imported faults are ordered in ascending order based on their name.

Technical Functionality

The DATA file is parsed for the FAULT keyword. Also INCLUDE keywords are read, and included files are parsed for the FAULTS keyword.
Currently the PATH keyword is NOT supported.

Reduce case loading time

As import of faults can be time consuming, reading of faults can be disabled from Preferences ->Import faults

Undefined grid faults

All the detected cell faces are compared to the faults imported from the *.DATA file in order to group them. If a particular face is not found among the fault faces defined in the *.DATA file or it's opposite face, the cell face is added to a fault called Undefined grid faults. This particular Fault will always be present, even if reading of the *.DATA file is disabled.

Fault color

Each named Fault is given a color on import. This color can be controlled by selecting the fault and edit its Fault color in the Property Editor.

Separate Fault Result

Default result mapping on faults is using the result specified in Cell Result. If a different result mapping is wanted, enable the checkbox at Separate Fault Result and select the result from the result selection dialog in the Property Editor. A second legend for the fault result is added to the view.

Fault visibility

Faults can be disabled from the context menu in the 3D view. Also unchecking the checkbox in front of the fault will hide the fault. Visibility for multiple faults can be controlled from the context menu of the Faults tree item.

NNC visualization

If enabled in Preferences, ResInsight will read Non Neighbor Connections from the Eclipse output file (*.INIT), and create explicit visualizations of those witch have a common surface area. These NNC's are then sorted onto the Fault's and their visibility is controlled from the Property Editor of the Faults Item in the Project Tree.

The color of the NNC faces are set to be a bit lighter than their corresponding named fault, and can not be controlled directly.

Picking info

When clicking on a cell face that is member of a fault, the fault name is displayed in the Result Info window, along with cell, and result property info.

When clicking on a NNC, the relevant data for this NNC is displayed.

Fault visualization options

Toolbar control

Visualization mode and mesh lines can be controlled from the toolbar.

•  Faults-Only visualization mode.
  When turned on, this option hides all the grid cells, and shows only the fault faces in the reservoir limited by the applied range and property filters. (Unless Show faults outside filters are turned on. See below.)
•  Turns faces on and mesh off
•  Turns on all faces, and shows meshlines on faults only.
  This is a useful method to highlight the faults in your reservoir, because the faults stands out with black outlining.
•  Shows labels for faults

Common Fault Options

By clicking the  Faults item in the Project Tree, the following options common to all the faults are displayed:


Fault labels

• Show labels: Displays one label per fault with the name defined in the *.DATA-file
• Label color: Defines the label color

Fault options

• Show faults outside filters: Turning this option on, will display faults outside the filter region, making the fault visualization completely ignore the Range and Property filters in action.
• Show results on faults: This toggle controls whether to show the selected result property on the faults or not. This should normally be left on.

Fault Face Visibility

This group of options controls the visibility of the fault faces. Since they work together, and in some cases are overridden by the system, they can be a bit confusing.

First of all. These options are only available in Faults-only visualization mode. ( See Toolbar Control above) When not in Faults-Only mode, ResInsight overrides the options, and the controls are inactive.

Secondly: The option you would normally want to adjust is Dynamic Face Selection (See below).

• Show defined faces: Displays the fault cell faces that are defined on the Eclipse input file (*.DATA)
• Show opposite faces: Displays the opposite fault cell faces from what is defined on the input file, based on IJK neighbors.
  These two options should normally be left On.
  They are useful when investigating the exact faults information provided on the *.DATA file.
  If you need to use them, it is normally wise to set the Dynamic Face Selection to "Show Both"

NNC Visibility

• Show NNCs: Toggles whether to display the Non Neighbor Connections, or not.
• Hide NNC geometry if no NNC result is available: Automatically hides NNC geometry if no NNC results are available

Dynamic Face Selection

At one particular position on a fault there are usually two cells competing for your attention: The cell closer to you as the viewer, or the one further from you. When showing results, this becomes important because these two cell faces have different result property values, and thus color.

This option controls which of the two cell faces you actually can see: The one behind the fault, or the one in front of the fault. There is also an option of showing both, which will give you an undefined mixture, making it hard to be certain what you see.

This means that ResInsight turns on or off the faces based on your view position and this option to make sure that you always see the faces (and thus the result property) you request.