Log Curve Histogram Tool

The Log Curve Histogram tool allows the User to sample any Log Curve in a Vertical or Horizontal Log track and create a histogram plot. The Depth, Scale, Data Type, and Style can all be controlled from the "Histogram" tab in the Log Display Settings dialog box.

Displaying a Log Curve Histogram:

1. Open the Log Display Settings dialog box

   • Note: The simplest way is to click on the Log header. A right-click & Scene Control access point also exists: Working with logs in the 2D Viewer

2. Select the "Histogram" tab

3. Use the "Vertical" and/or "Horizontal" dropdowns to select a histogram dataset to display in the related Log Track

   • Note: the Histogram Log Header will be displayed below the Log Curve Header (Image)

   • Use the display controls to customize the Histogram display

4. The Log Curve Histograms will be plotted in the same Log Track as the Log Curve

Histogram Options:

• Count: Counts the number of samples in each Histogram Bar Length

• Length Sum: Sums up the Total Wellbore length in each Histogram Bar Length

• Sum: Sums all of the Log Curve data in the Histogram Bar Length

• Average: Calculates the Average Curve Data in the Histogram Bar Length

Histogram Display Options:

1. Curve Display Options

   • "Draw Under Curve" checkbox: Will render the Histograms under the related Log Curve if applicable

     • Note: Log Header rendering order honored when Histograms are displayed

   • Opacity Slider: Controls the opacity of the Histograms

2. Sampling and Scale Control

   • Histogram Bin Width Input (Pixel or Depth):

     • Note: Default is 10 Pixels

   • Min/Max Inputs (TVD or TVT): defined by the Vertical Log Track Scale

     • Note: When the Vertical Log Track is switched between TVD and TVT the inputs will be auto-recalculated

   • Amplitude Control:

     • "Scale" dropdown: Toggle between Linear and Log scale

     • "Auto" checkbox: When checked on, ZoneVu will auto-calculate the scale so the Max data value is set as the scale Max

     • Min/Max Input: Allows the users to set a desired Min/Max.

       • Note: If no inputs are provided the largest Histogram value will be used as the Max

3. Histogram Line Style: Control the Line Style of the Histograms

   1. "Show" checkbox: Toggles the Histogram outlines On/Off

   2. "Width" checkbox: Sets the line width; set to '1' by default

   3. "Dashed" checkbox: Changes the outlines to a dashed line

   4. Color Selector: Click on the color square to change the Line Color

4. Histogram Fill Style: Control the Fill Style of the Histograms

   1. "Show" checkbox: Toggles the Histogram color fill On/Off

   2. "Color Style" dropdown: Choose between "Single Color" and "Color Table"

   3. Color Table selector: Shows the current Color Table. Clicking this button will open up the Color Table Options dialog box

   4. "Reverse colors" checkbox: Reverses the selected Color Table

   5. "Link Min/Max" checkbox: Links the Color Table scale to the Histogram scale. If unchecked the Histogram scale can be set independently of the Histogram scale