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2.5 Demo project

 
A small demonstration project named VikingX is included in the MigriX installation. Below is a short walkthrough on how to open, simulate and view some results from this project. By following these steps, you will get a first introduction to the MigriX user interface and functionality.
 
1. Opening the project.
 
a) Start MigriX and select File->Open Project. Navigate to the VikingX Project.  On Windows systems, this will be normally be in the User/MigriProjects/VikingX directory.
On Linux systems, you may need to copy over the project directory from the installation to your home directory first.
 
b) Select and open the VikingX.mirp project file in the /migri directory
This will open the project and display the layer geometries in the 3D view. On the left side the Project Workspace panel shows the layers and all input parameters
 
Figure 2.5 MigriX user interface after the VikingX project has been loaded.
 
2. Viewing model data
 
You can now try to plot some of the model data. Expand the Properties/Model/Structure folder in the project workspace and click on the Depth item. This will plot the depth of the layers in the 3D view. Try the same with some other other Properties/Model parameters, for example:
 
 
Figure 2.6 Viewing the Model/depth property.
 
3. Viewing input data
 
Next, try looking at some of the input parameters in the Properties/Input folder in Project Workspace. First try clicking on the Lithologies/Vsh item. Notice that the contents of the Properties panel below the Project Workspace now changes. In this panel you should now see the input values that have been assigned for the Vsh parameter to the different layers.
Try the same for some of the other parameters as well, for example:
 
 
Figure 2.7 Viewing the Input/vsh input values.
 
4. Navigating in the 3D View
 
Try to move the layer model around in the 3D view. Use the left mouse button <LMB> to pan, right mouse button <RMB> to rotate and <LMB + RMB> to zoom.
Next, try pulling the model layers apart and together by using the stretching slider in the View toolbar. Shift between 2D and 3D views by using the 2D/3D button in the toolbar.
In 2D mode, you can choose which layer to view by selecting in the Layers part of the Project Workspace. To clear the selection, click in the 3D view outside of  the visible layers.
 
To revert to the default viewpoint and orientation, press the Frame Model button in the toolbar.
 
Figure 2.8 View toolbar. Stretching slider to the left. The 2D/3D button (with "2D" text) is next to it. The Frame Model button (square box icon) is the 4th from the right.
 
5. Simulating migration
 
Now you can try to simulate the model. Do this by locating the Simulation toolbar and click on the Simulate To->0Ma button. This is the rightmost button on the toolbar.
 
Figure 2.9: The simulation toolbar with simulate to 0Ma button highlighted
 
Notice that a progress bar now appears in the lower right corner of the user interface. This bar indicates how much of the simulation that has completed. The simulation should not take longer than at most 4-5 minutes for this model.
 
Figure 2.10 Simulation progress bar
 
The current model timestep is shown in the right corner of the 3D view. Each time a timestep is completed, MigriX will plot the modelled migration. You can navigate and zoom in the3D view while the simulation is running, but you cannot plot other properties or change the input parameters in the project workspace
 
Figure 2.11 Timestep indicator
 
When the simulation has completed, you will see that there is migration modelled in one of the layers - the 159MA (Top Middle Jurassic) unit. Both oil flow (green), gas flow (red) and mixed phase flow (violet) is seen. Some traps are also modelled, mostly with gas (red).
 
Figure 2.12 Modelled migration at present day. The layers have been pulled apart with the Model stretching slider in the View toolbar.
 
You can now try to look at some of the modelling results, by selecting from the Results sections in the Project Workspace. We suggest looking at the following items:
 
6. Changing timesteps
 
Next, try to change the active timestep by selecting from the dropdown menu in the Simulation toolbar. Notice how the plotted result property changes as you move back and forward in time. You may also use the - (decrement timsteps) and + (increment timestep) buttons to change the active timestep. Note that not all result properties are available for the palaeo-timesteps yet, but the HC.flowrates and Gas.expelled/Oil.expelled plots can be used.
 
Figure 2.13 Changing timestep with the Simulation toolbar.
 
7. Viewing Trap statistics
 
We can now have a look at the detailed statistics for one trap. Locate one of the large traps in the model, for example the one shown in the figure below.  Pick it holding down the <CTRL> button and left clicking on the trap. Now hold down the <RMB> button to bring up a menu. Select the Show trap info/All traps (current pick) item.
 
Figure 2.14  Selecting a trap to view.
 
This will bring up the Trap Viewer component. You can now have look at the different tabs to view the filling history for the selected trap. In particular, we suggest looking at
For the Trapped HC and Moved HC charts, you may want to activate the Sum all traps option, in case the trap you have selected consists of several traps that have merged at some point in time.
 
Figure 2.15 Trapped HC Chart for the selected trap.
 
8. Updating an input parameter
 
As a final step in this walkthrough, we suggest changing one (or more) of the input parameters and re-simulating the model to see the effects on the simulation results.
For example, you may navigate to the Input/Lithologies/Lithology item in the Project Workspace folder and change the lithology from Shale to Sandstone (Ss).
 
Figure 2.16 Changing the lithology of the 142Ma layer.
 
Notice that the Update Model icon on the Toolbar menu now changes to a red colour. This means that we will need to click on the Update Model button in order for the changes to take effect. This step is necessary when changing the most central parameters controlling geometries, timesteps, lithologies etc. Press the Update Model button, and notice that the colour changes back to light blue.
Figure 2.17 Toolbar with red Update Model icon, indicating that a model update step is needed before simulating.
 
9. Re-simulating the model
 
We are now ready to simulate the updated model. First, click on the Restart Simulation button in the Simulation toolbar. This resets the simulation to the beginning of the history. Then click on "Simulate" to 0Ma to run the simulation for the full history.
 
Figure 2.17 Simulation toolbar with Restart simulation (left) and Simulate to 0Ma (right) buttons highlighted.
 
When the simulation completes, you should see that there is now migration in two layers: 159Ma (Middle Jurassic) and 142Ma (Upper Jurassic) Both of these layers are now sourced from the 143Ma layer source rock.
 
Figure 2.18 Migration results at present day after updating the model and re-simulating.
 
 
This concludes the walkthrough for the VikingX model. You may want continue by looking at the Training Videos, which are also based on the VikingX model. These videos show different aspects of the modelling workflow. Of particular interest may be the videos on Simulation and animation and on Project generation. Most of the project files used in these videos are also included with the VikingX project.
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