Upscaling Grid Properties

The Upscale Grid Property form (model > Facies > Tools > Map Properties or model > Rock Properties > Tools > Map Properties) allows you to upscale grid properties within a single 3D grid using various upscaling methods and optional mapping filters. Using this process you can simply upscale a property or, for example, create weighted property averages on a per layer or zone basis.

To upscale a 3D grid property:

  1. Select the grid to use for grid property upscaling.
  2. Select the grid property to upscale within the selected grid. You can only upscale one property at a time.

  3. Specify the upscaling method. In case a weighted method is selected, a 'Weight' property may also be specified. Each of the upscaling methods is described below.

    Sum  The sum of the values of all corresponding cells.

    Min  The minimum of the values of all corresponding cells.

    Max  The maximum of the values of all corresponding cells.

    Arithmetic/Geometric/Harmonic mean  The arithmetic/geometric/harmonic average of the values of all corresponding cells.

    Arithmetic/Geometric/Harmonic mean weighted  The arithmetic/geometric/harmonic average of the values of all corresponding cells weighted with that corresponding cell’s weight property value.

    Most occurring  The most occurring of the values of all corresponding cells, for discrete properties only.

    Root Mean Square  The square root of the arithmetic mean of the squares of the values of all corresponding cells.

    Median  The median of the values of all corresponding cells.

  4. Optionally, a filter can be applied to the upscaled property. Filtering can be used to restrict the upscaling process to a specific aspect of the 3D grid like area, property, or zone. You can specify two filter criteria: a primary filter and secondary filter. To apply a filter, select the filter option, select the filter ID, and select the class. Use the secondary filter to refine the primary filter selection. In case you select both the primary and secondary filter option, the logical 'AND' operation will be applied: upscaling will only be applied to the intersecting areas. The two tables below describe the filtering options.

    Primary filter / Secondary filter  Check this option if you want to use a discrete property for filtering.

    Filter property  Select the discrete property to filter on, for example, a zone property in you want to upscale property data per zone.

    Classes  Select one or more discrete property classes to filter on, for example, Zone1 and Zone2 in case you want to upscale property data ONLY for Zone1 and Zone2.

    For each filter selected a list of classes can be chosen from. For making quick, broad selections you can right-click in the list and select one of the following options from the context menu.

    Select all  Selects all the regions or layers in this list.

    Invert selection  Inverts the selection so that those already selected are deselected, and those not selected become selected.

    Select none  Deselects all the regions or layers in this list.

    Any discrete property can be used for filtering, which makes it very flexible to create any average map you want, for example using a region property.

    Examples

    Example 1: To create an average porosity property for every zone in the model at level 1, select the porosity property as the 'property to map', select an averaging method and use the filter settings in the image    click to enlarge

    Example 2: To create an average porosity map for every zone in the model at level 2, select the porosity property as the 'property to map', select an averaging method and use the filtering settings in the image    click to enlarge

  5. When you create an upscaled property, the name of the source property is used and you can add a prefix or a suffix to distinguish it from the original. One additional option, Replace all values, allows you to overwrite an existing property with the same name. If not selected, a new property with the same name and sequential number is created, for example, this operation will result in a property named 'Porosity_upscaled(1)' if 'Porosity_upscaled' already exists and the 'Replace all values' option is not selected.
  6. Click the Create button to create the upscaled grid property. The property will be available as an additional property of the selected grid and can be selected in the JewelExplorer for display.