Assigning data to a surface definition

On the Assign Data form (prepare > Surfaces > Create Surface > Assign Data) you specify the input data to be used for the surface construction. Input data can consist of multiple events with different representations, stored in various data sources, i.e. the Imports folder, Data folder, Surface Sets, Seismic Interpretations, Marker Sets, Fault Models, 3D Structural Models and 3D Mesh Structural Models.

Make sure to avoid overlap of data (e.g. a marker and tri-mesh both exist at the same XY location). In case of conflicting inputs, it cannot be predicted which data will be honored or ignored by the interpolation algorithm. The most common cause of conflicting data is when you use markers in combination with a tri-mesh or 2D grid as input. Consider well matching in this case for which you can use the Depth Well Matching tool in the Post-Processing Tools strip.

Apart from using input data to create a surface, you can also use the option 'Without Input' (not supported for faults), in which case you can choose to create a flat surface, or a surface modeled with SGS(*), both with the option to apply a dip in specified direction. This way you can quickly create a surface at a specified depth.

(*) An SGS-modeled plane is a surface modeled with the stochastic modeling method Sequential Gaussian Simulation. For this, a variogram and standard deviation for depth amplitude need to be specified. For details, see Define Interpolation > SGS.

To assign the input data

  1. Open the Assign Data form.
  2. At the top of the form, under Surface definition, select the surface definition to which you want to assign data.
  3. Under Input Data, choose one of the following:
    • With Input - Create a surface based on existing input data. You specify the input data in step 4.
    • Without Input (not applicable to faults) - Create a surface not based on any input data. Your surface will be a flat plane or a plane modeled with SGS at specified depth and optionally with a dip. You specify these settings in subsequent workflow steps. If you select 'Without Input', click OK at the base of the form. The application will skip 'Clean Up Data' and move directly to Resolution and Clipping where you can continue the workflow.

    To specify the input data

  4. The Input(s) table on the form is only enabled when you selected 'With Input' in step 3. Put all the data that you want to use as input for your surface in this table. You can do this in two ways:
    • Via drag-and-drop from the JewelExplorer. Click on an event or representation in the JewelExplorer and hold down the mouse while you 'drag' the selected object to the table, then release the mouse.
    • Click on the green plus icon () above the table. Each click adds a row to the table. When in a row, open the drop-downs of subsequently the Source, Type and Name columns to select your input.

    When you have added your data to the table, check the box(es) of the representation(s) you want to use as input in the last column.

    5. Columns in the Input table:

    Source - You can drag/select input data from the following sources: Imports folder, Data folder, Surface Sets, Seismic Interpretations, Marker Sets, Fault Models, 3D Structural Models and 3D Mesh Structural Models. The drop-down list shows the sources available in your solution.

    Type - All the JewelSuite surface types which can occur in the supported sources can be used as input. Commonly used surface types are: Fault, Horizon, Unconformity, Intrusion, Fluid contact, Fracture, Boundary, Map. The drop-down list shows the surface types that are present in the selected source.

    Name - Lists the events with the selected surface type in the selected source.

    Representation - A white (enabled) checkbox means the representation is present for the selected event; a gray (disabled) checkbox means the representation does not exist for the selected event. Check the box for the representation(s) you want to use as input.

  5. By default the checkboxes of existing representations are checked in the table on the form. Uncheck the checkboxes of the representations that you do not want to use.
  6. Special note if you are using multiple events and/or multiple representations as input:
    • As all input data will be combined into one output surface, avoid overlap of data (e.g. a marker and tri-mesh both exist at the same XY location): in case of conflicting inputs, it cannot be predicted which data will be honored or ignored by the interpolation algorithm.
    • When selecting multiple data representations for one event (e.g. a polyline set and a tri-mesh for event 'Horizon A'), all data points (nodes) of these data representations are used as input. There is no precedence of one data representation over the other.
  7. When you have finished dragging/selecting your input data, click Apply to save the selection to the surface definition and keep the form open, or click OK to save the selection to the surface definition and move to the next workflow step, Clean Up Data.