Creating log composites

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Creating log composites

Take a range of data from a donor well and either insert it into or replace part of a host well.

Log data from the specified depth range of the donor well is copied to the corresponding log type in the host well. Logs in the donor well without corresponding logs in the host well are ignored unless you manually associate them with logs in the host well.

To create log composites:

Open the log editor:

Edit > Log editing
Double click on a log in the model.
Right-click on a log and select Log editing.

In the toolbar beside the Log Editor, click the Composite tool ().

The Import log data dialog box opens.

Select the root directory or drive from the Look in drop-down list then double-click folders in the display pane to browse to the directory that contains either the desired files or the subdirectory with those files. To filter the type of files displayed, from the File filter drop-down list, select a file format extension.
Either click Browse dir. or Browse sub-dir to launch Directory Browser displaying LAS and GeoSyn files sorted by UWI, or simply select the desired file in the display pane. For details on using Directory Browser, see Related Topics below. For LAS files, you can inspect and modify the raw data in an ASCII text editor before importing it by clicking File Viewer.When you select the file, details appear in the format file pane.
In the well tree, select whether to import specific logs. A check mark () appears beside logs that will import, a cross () beside those that won't. For wells with numerous logs, toggle the group by clicking All depending on whether to import or ignore the majority of logs then toggle the individual logs to import or ignore and click Import.

The Log Composite dialog box opens displaying which logs from the donor well will be inserted into logs of the host well.

Logs that match appear in the pane to the right. Logs that don't completely align and for which some constant values will need to be applied are colored red in the cell between the donor and recipient log.

Drag a log from the Unmatched pane into the Matched pane in the left-most cell of the row that lists the desired recipient log, or drag it from the Matched pane to the Unmatched pane if you don't want it to be a donor log.
Drag the alias in the left-most column of the Matched pane to change the default recipient log.

Do one of the following:

Type precise values in the Copy range and Replacement range boxes and then click Update.

Click top and bottom to accept the absolute depth from the log.
Click Depths from tops to display the Depth Range from Tops dialog box and then select the formation tops that signify your zone of interest from the drop-down lists and click OK.

Click Apply and then click Close.

Creating log composites

To create log composites:

Related Topics