Updated CaseGroupsAndStatistics.md

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Magne Sjaastad
2014-07-03 01:24:50 +02:00
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next_section: octaveinterface
title: Grid Case Groups and Statistics
permalink: /docs/casegroupsandstatistics/
published: true
---
## Grid Case Groups and Statistics
![]({{ site.baseurl }}/images/GridCaseGroupTree.png)
**Grid Case Group**'s are designed to make it easy to calculate statistics per cell and per timestep of a large number of Eclipse simulation Cases with identical Grids (often labeled *realizations*).
If you have several Eclipse simulations with different input parameters available, you can put all the realizations into a Grid Case Group and easily calculate each of the cells mean value, range and max/min values at each timestep between the realizations.
### Creating Grid Case Groups
#### From files
## Creating Grid Case Groups
### From files
The easiest way to create a **Grid Case Group** is to use the Import command:
**File->Import->Create Grid Case Group from Files**
@@ -32,22 +31,21 @@ ResInsight then creates a **Grid Case Group** for you, and populates its **Sourc
This makes it quite fast to lo ad even a quite large number of realizations.
#### Manually
### Manually
A Grid Case Group can be created from the context menu available when right clicking a Result Case, Input Case or a different Grid Case Group. **Source Cases** can then be added by using the mouse to *drag and drop* cases with equal grids into the **Grid Case Group**'s **Source Case** folder.
This is useful if you want to create statistics based only on a subset of the source cases in an already created **Grid Case Group**.
**Drag and Drop** of cases will normally copy the cases to the new destination, but moving them is possible by pressing and holding the **Shift** key while dropping.
### Viewing special Source Cases
## Viewing special Source Cases
To reduce the number of views, only a view for the first case is created automatically. If you want to inspect the results of a particular source case, right click the case and select **New view** from the context menu. A new 3D View will the be created on that particular case.
*TIP:* To reduce memory usage, project loading time etc. it is vise to delete the 3D Views you do not need. 3D Views use a lot of system resources.
### Statistics ##
## Statistics
After creating a grid case group, an empty **Statistics Case** is created for you in the **Derived Statistics** folder of the **Grid Case Group**.
#### Setting up and Calculate
### Setting up and Calculate
The properties of an uncalculated and a calculated **Statistics Case** is shown below:
![]({{ site.baseurl }}/images/StatisticsCaseProperties.png) ![]({{ site.baseurl }}/images/StatisticsCasePropertiesCalculated.png)
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- **Percentile Setup**: Selects whether to calculate percentiles, what method and what percentile levels should be used. Turning this off speeds up the calculations.
- **Well Data Source Case**: This option selects which set of **Simulation Wells** to be shown along with the statistical results. You can select one of the **Source Cases**.
##### Percentile Methods
#### Percentile Methods
Three Percentile methods are implemented:
@@ -71,10 +69,8 @@ The values are sorted, and the first observation representing a probability high
A histogram is created and the percentile is calculated based on the histogram. This method will be faster when having a large number of realizations, because no value sorting is involved. You would however need several hundred realizations before this method should be considered.
#### Viewing the results
### Viewing the results
When the computation is complete, you have to create a 3D View on the **Statistics Case** to view the results. Use the Context menu available by right clicking the **Statistics Case** to create it.
#### Adding Statistics Cases
A new statistical calculation can be created by activating the context menu for **Derived Statistic->New Statistics Case**.
### Adding Statistics Cases
A new statistical calculation can be created by activating the context menu for **Derived Statistic->New Statistics Case**.