VIEWING THE MODEL AND CALCULATING OUTPUT

Starting ViewGen

Once a run instruction file (<project_name>.TGDATA) has been created and saved using WizGen, the model can be run by selecting the ViewGen icon on the TransGen Control Menu (as shown below).

This performs the calculations, generates output files and launches the ViewGen graphics viewer. The progress of the ViewGen run can be monitored in the xterm from which the user started the TransGen session and the Log generated by the current run together with any generated error messages can be viewed in the Session Log window accessed via WizGen.

HINT:- ViewGen can be run initially without calculating fault properties (i.e. with the Do not calculate fault properties option toggled "on" via the Miscellaneous Options page of WizGen) to check the input model has been imported correctly. If there are problems, return to the Coordinate System page of WizGen to check the layout of the input data has been specified correctly.

If the Include fault drag and hierarchical zone effects option has been toggled "on" in WizGen ("Flexible Project" mode) with appropriate Drag applied to fault traces and Hierarchical fault zone definition settings, ViewGen will check the input data, identify the system traces, process user-defined traces, place fault zones and make a coherent geometrical model before calculating model properties, generating the output files and opening the main ViewGen graphics window.

See section below for further details:-

If the Include two-phase fault rock calculations option has been toggled "on" in WizGen ("Flexible Project" mode) with the appropriate single-phase and two-phase settings, ViewGen will check the input data, define the cell groups and output the KRNUM tables necessary to run the 2PhaseGen application before calculating the model properties, generating the output files and opening the ViewGen graphics window.

See section below for further details:-

On completion of a successful ViewGen run with the current TGDATA file settings and provided the Enable 3D graphics viewer after calculation has completed option is toggled "on" (default setting) via the Output page of WizGen, the ViewGen graphics window (shown below) will be displayed.

HINT:- The progress of the ViewGen run can be monitored in the Xterm window from which the current TransGen session was started.

The ViewGen graphics window allows the user to view the input simulator model and the new fault-related properties that have been calculated. Initially the model volume outline will be displayed in map view, scaled to the window, with the origin indicated by an arrow, but with no cells or faults displayed until selected.

To display the model data in the ViewGen graphics window, toggle "on" the required elements via the Show options in the Edit menu. In the example shown below the cells and faults in the current project are displayed enclosed in the volume of interest box with an arrow adjacent to the origin of the model (row1, column 1) pointing downwards.  

The model has been moved in the window using the following mouse actions:-

<MB1> to rotate the model. Click and drag to rotate the model about its centre. Drag to left or right to rotate the model about the screen's vertical axis, drag up or down to rotate about the screen's horizontal axis.

<MB2> to zoom into/out from the model. Click and drag down to zoom in. Click and drag upwards to zoom out.

<MB3> to pan the model. Click and drag the mouse to move the model in the desired direction.

NOTE:- New to the TransGen 3.1 release, there is a Messages text bar under the main 3D viewer window. This can be used to access information on the properties of a cell, fault connection or fault trace selected in the 3D viewer window, i.e. place the cursor over a cell, fault connection or trace currently displayed in the viewer window and click the left mouse button (<MB1>) whilst holding down the Control (Ctrl) key to send information on that object to the Messages text window.
For a selected cell, the information displayed will be the cell's position (column, row, layer) and the value of the active cell property (as shown below).

For a selected fault connection, the information displayed will be the positions of the two connected cells and the value of the active fault property.

For a selected fault trace, the information displayed will be the trace definition and the throw.

HINT:- Fault traces are 2D objects, new to the TransGen version 3.2 release - see section on Traces and Fault zones. While fault traces will automatically be displayed when the Show traces option is toggled "on" in the Edit menu, they are only strictly relevant when including fault drag and hierarchical zone effects in the run file (see using WizGen in Flexible project mode).

The ViewGen viewer window main menu bar contains five submenus:

File                           - to close the application

Edit                          - to select which features of the model will be displayed (cells, faults, coord lines, traces, wells,  x-section, volume of interest (VOI) box, origin arrow),  volume and value filters to select subsets of the data, colourbars to determine how the data will be displayed, and other viewer controls.

Cell Properties     - to choose which cell property will be 'active' and displayed in the viewer.

Fault Properties   - to choose which fault property will be 'active' and displayed in the viewer.

Help                         -to display details of the TransGen version and launch the on-line Workflow Advisor.

These are detailed in the following sections:-