Using Multiple Well Crossplots

Cross-plotting curves from wells can identify relationships in well data.

Tip: The cursor is linked between well views and well crossplots. When moving the cursor in a well view, the crossplot cursor moves to the corresponding crossplot coordinates.

Note: Well curves can only be crossplotted against other well curves. Contact support@dug.com to express your interest in crossplotting wells against other data.

Creating the crossplot

  1. Open an existing crossplot or create a new one.
  2. Open the Data tab.
  3. Configure the Horizontal and Vertical Data Sets:
    • Data Type: Well Curve
    • Data Source: Choose the curve class for each axis. Alongside any curves loaded on the well, built-in runtime depth curves are available: MD (from well path), TVDSS (from well path), TVDBML (from well path), TVDSS (from MD), and TVDBML (from MD). The (from MD) curves are generated per curveset with a visible depth (MD) curve and follow its sampling rate; the (from well path) curves use the (typically coarser) well path sampling instead

    • Colour Data Set (for Point-by-Point plot types): Select the Data Type and Data Source to use for colour values.

Adding and configuring wells

  1. In the Wells section, click the blue + icon to add a well.
    • Green/yellow circle: Include/exclude values from a well
    • Well column: Select the well
    • X axis: Select the horizontal curve for this well
    • Y axis: Select the vertical curve for this well
    • Red x: Remove well

  2. Shape: Click and select the shape of the points for each well.

  3. Set Start and Stop to choose an interval to crossplot
  4. Start and Stop locations:
    • Top of Well: The shallowest well position
    • TD of Well: The deepest well position
    • Depth: A single depth value (MDKB, TVDSS, TVDBML)
    • Horizon: Choose a horizon (with optional offset)
    • Marker: Choose a marker (with optional offset)
  5. Data Range: The interval used to select values is shown in MD.

Note: Yellow highlight indicates the setting is incomplete, make sure the value is complete or valid.

Colouring points by another curve

When crossplotting wells, use a third curve to colour the points.

  1. Go to the Data tab.

  2. Set Plot Type to Point by Point.

  3. In the Colour Data Set section, configure the following:

    • Data Type: Select Well Curve.

    • Data Source: Click and choose the curve class to use to colour the points.

  1. At each well, a third curve selector is added to the wells.

Colouring points by well

When crossplotting wells, use Well ID to identify the source of data points.

  1. Go to the Data tab.

  2. Set Plot Type to Point by Point.

  3. In the Colour Data Set section, configure the following:

    • Data Type: Select Well Curve.

    • Data Source: Click and select ID Number.

  4. At each well, a third curve selector is added.

  5. Select the curve Well ID.

Tip: Well ID can also be used for horizontal and vertical axis data.