The Log page in the Property Manager includes options for defining the data, scaling, range, data direction, and wrap style for line/symbol logs and function logs. To view and edit line/symbol or function log properties, click on the log in the view window or Object Manager to select the log. Then, click on the Log tab in the Property Manager.
Edit line/symbol log properties on the
Log tab in the Property Manager.
The Hole ID Filter is used to select the borehole to associate with this log. Only those Hole IDs that are currently associated with data tables in this project are listed. To change the Hole ID Filter, click on the existing Hole ID and select the desired Hole ID from the list. The log automatically updates to show the new borehole.
When the Logs object is selected in a cross section view, the Hole ID Filter is not available. To set a specific log to a particular Hole ID, click on that individual log and set the Hole ID Filter to the appropriate log.
Use the Table to define the data table for the line/symbol log. The table type can be an interval table or a depth table. If the table is a depth table, the points are plotted at the depth listed in the table. If the table type is an interval type table, the depth is determined by calculating the mid-point position between the To and From columns in the corresponding table. To change the table, click on the existing table name and select the desired table from the list.
Each variable column is represented by a line/symbol plot on the log. Add or change the variable column or columns in the log by clicking Edit in the Edit variable columns field. Select the variables to include in the plot in the Select Columns dialog. When the Table is changed to another table, the Data Column list is automatically updated to display the column names in the newly selected table. To change the column, click on the existing column name next to Data Column and select the desired column from the list.
Scale bars are created automatically for each variable in the line/symbol log by default. When adding variables to the line/symbol log, the new scale bar or bars use the same properties as the existing scale bar. The new scale bars are linked to the added variables. The Scale Bar Title properties are not shared. The scale bar minimum, maximum, and minor divisions are not shared when Use all columns for range check box is checked. The scale bar minimum, maximum, and minor divisions are shared when the Use all columns for range check box is checked. The scale bar minimum, maximum, and minor divisions are controlled by the Variable Grid Lines properties on the Line page in the Property Manager in both cases. When a variable is removed from the line/symbol log, the linked scale bar is automatically removed.
The Hole Inclination Column (or Hole Dip Column) is used in combination with the Hole Azimuth Column to calculate the true vertical depth for the hole. Either Hole Inclination Column or Hole Dip Column is displayed. To control whether inclination or dip is used, click the File | Options command. In the Options dialog, check or uncheck the Use Hole Dip Instead Of Inclination option.
Inclination is the angle the borehole is oriented in degrees and varies from 0 to 180. 0 indicates vertical pointing down, 90 indicates horizontal, and 180 indicates vertical pointing up. Negative and positive inclination values are treated the same for depth calculations. Negative inclination values are treated differently for well path calculations in the cross section and map views. A negative inclination changes the direction (azimuth) to the opposite of the similar positive inclination. For example, the azimuth value of 90 and inclination of 45 describes the same orientation as the azimuth value of 270 and inclination of -45 degrees. Both combinations describe an eastward direction at 45 degrees down from the horizontal plane.
Dip is an alternate method of calculating the angle the borehole is oriented. Dip is oriented in degrees and varies from -90 to 90. -90 indicates vertical pointing down, 0 indicates horizontal, and +90 indicates vertical pointing up.
Azimuth is the compass orientation of the well's deviation, in degrees and varies from 0 (true vertical north) to 360. Azimuth values are measured relative to true north (not grid north in the local coordinate system).
To set the Hole Inclination Column or Hole Dip Column, click on the existing option and select the desired option from the list. Available options are [Unspecified], [From collars table:collars name], [From survey table: survey name], or data columns in the existing Curve Table. When one column is set to unspecified or survey table, the other column automatically changes to the same option. When recorded in a collars table, the inclination/dip and azimuth apply to the entire well length. When recorded in a survey table, the inclination/dip and azimuth apply from the depth to the next recorded depth. When set to one of the columns in the existing table, each log is updated independently from each other log using the information in the specific depth or interval tables. If the Hole Inclination Column for the log is set to [Unspecified], an inclination value of 0 is used for the calculations. No difference will be visible for the log when changing the Depth Method to True Vertical Depth.
The Axis Type is Linear or Logarithmic. The data must be greater than zero when using a Logarithmic axis. Values equal to and less than zero are ignored in the log when Logarithmic is selected. Logarithmic uses a log (base 10) scale for the horizontal axis. To change the axis type, click on the existing option and select the desired option from the list.
The Missing data option controls how rows of empty data are displayed on the log. Set Missing data to Continuous to show rows of missing data as a continuous line between the data values on each side of the missing data. Select Discontinuous to show the missing data as a gap in the line of the log. To set the Missing data option, click on the existing option and select the desired option from the list.
Strater has the option to display missing data in a line log as either a continuous or discontinuous line.
For this example use the sample file SAMPLE VIEW 1.SDG, which is found in the Strater Samples. By default, this directory is located at C:\Program Files\Golden Software\Strater 5\Samples.
Click on the Depth data table tab.
In Column C (Au) delete the contents of rows 12 to 18 by highlighting them and pressing the DELETE key on the keyboard.
Delete some variable data from the table.
Click the Borehole 1 tab to view the logs.
Click on the line/symbol log in the Object Manager or view window.
In the Property Manager, click on the Line/Symbol Log tab. The Missing Data option is set to Continuous.
Change the Missing Data property from Continuous to Discontinuous to create a gap in the missing data section.
The line log changes to discontinuous, with a gap in the line where the data is missing.
|
|
|
Missing data can be displayed as a continuous line. |
|
Missing data is plotted to create a discontinuous line. |
Wrapping is unique to log plotting and is only available when the [Variable] Auto data range check box is not checked. Wrapping determines how values that are larger than the [Variable] maximum value are displayed. Available options are None, Truncate, Wrap, Wrap - 10X, Wrap - 100X.
Select None to not have the log wrapped. If points are outside the data range, the points are removed from the display of the log, as if they were not in the data table. New data points are created where the line intersects the edge of the log.
When Truncate is selected, the bounding box of the log clips any data out of range and a straight line is created at the edge of the log. New data points are created where the line intersects the edge of the log.
Select Wrap to bring the part of the log that extends beyond the range to the other side of the log and continue. If the wrapping continues more than once, the edge of the graph is truncated. Wrapping more than once makes the graph difficult to follow and in this case, one of the other wrapping scales should be used.
Wrap - 10X wraps the data as with Wrap, but the scale for the wrapped portion is 10 times the range of the main data. For instance, the original graph goes from 0 to 10, the wrapped range represents 10 to 110.
Wrap - 100X is similar to Wrap - 10X but the wrapped scale ranges from 10 to 1010.
Note that fill properties are disabled when the Wrap style is set to Wrap, Wrap - 10X, or Wrap - 100X.
The Curve type determines how the line is displayed. Available options are Line and Stair Step. Line draws a simple line log, directly connecting adjacent points using the shortest path. Stair Step draws connecting lines between adjacent points using horizontal and vertical lines. To change the curve type, click on the existing option and select the desired option from the list.
Check the Use all columns for range check box to display all the line/symbol plots on one scale. When the Use all columns for range check box is checked, the following range and direction properties are the same for all plots on the line/symbol log: Auto data range, Minimum value, Maximum value, and Data direction.
Uncheck the Use all columns for range check box to display each line/symbol plot with an individual scale. When the Use all columns range check box is not checked, the following range and direction properties are edited for each plot independently: Variable auto data range, Variable minimum value, Variable maximum value, and Variable data direction properties.
The Active variable property is used to select a column for further editing. The Active variable is displayed when the Use all columns for range check box is not checked. Select the variable column you wish to edit in the Active variable list, and then change the Variable auto data range, Variable minimum value, Variable maximum value, and Variable data direction properties to the desired values. Change the Active variable to change the range and direction properties for a different variable column.
The Auto data range property is displayed when the Use all columns for range check box is checked. The horizontal scale can be set manually or automatically with the Auto data range option. When Auto data range is checked, Strater calculates a best-fit range of the data across all variable columns displayed in the log. When the Auto data range is not checked, the Minimum value and Maximum value properties are enabled, allowing manual control over the log's minimum and maximum values. The Wrap style property is also enabled when Auto data range is not checked. Click the check box to check or uncheck the Auto data range property.
The Variable auto data range property is displayed when the Use all columns for range check box is not checked. The horizontal scale can be set manually or automatically with the Variable auto data range option. When Variable auto data range is checked, Strater calculates a best-fit range of the data for the Active variable column. When the Variable auto data range is not checked, the Minimum value and Maximum value properties are enabled, allowing manual control over the Active variable column plot's minimum and maximum values. The Wrap style property is also enabled when Variable auto data range is not checked. Click the check box to check or uncheck the Variable auto data range property.
The Minimum value and Maximum value properties are displayed when the Use all columns for range check box is checked. The Minimum value and Maximum value are only available if the Auto data range check box is not checked. The Minimum value is the smallest value that should be displayed on the log. The Maximum value is the largest value that should be displayed on the log. To change the minimum and maximum values, uncheck the Auto data range check box. Then, highlight the existing value in Minimum value or Maximum value field and type the desired value.
The Variable minimum value and Variable maximum value properties are displayed when the Use all columns for range check box is not checked. The Variable minimum value and Variable maximum value are only available if the Variable auto data range check box is not checked. The Variable minimum value is the smallest value that should be displayed on the plot for the Active variable column. The Variable maximum value is the largest value that should be displayed on the log for the Active variable column. To change the minimum and maximum values for the Active variable column, uncheck the Variable auto data range check box. Then, highlight the existing value in Variable minimum value or Variable maximum value field and type the desired value.
If the Hole ID is changed for the log, the new data may or may not fit into the user-defined range. If the data does not fit inside the range, change the Minimum Value and Maximum Value to new values or set the Data Range to Auto.
The Data direction property is displayed when the Use all columns for range check box is checked. The Data direction is used to determine whether data should be displayed with low values on the left or right side of the log. Available options are Low to high and High to low. Low to high creates a log with the minimum data value on the left and the maximum data value on the right. High to low creates the log with the minimum data value on the right and the maximum data value on the left. To change the direction for the log, click on the existing option and select the desired option from the list.
The Variable data direction property is displayed when the Use all columns for range check box is not checked. The Variable data direction is used to determine whether data should be displayed with low values on the left or right side of the log for the Active variable column. Different variable columns can have different Variable data direction settings. Available options are Low to high and High to low. Low to high displays the plot with the minimum data value on the left and the maximum data value on the right. High to low displays the plot with the minimum data value on the right and the maximum data value on the left. To change the direction for the Active variable column plot, click on the existing option and select the desired option from the list.
See Also
