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Lithologic layers are used to indicate the subsurface strata encountered during drilling. Boreholes can contain an unlimited number of lithologic layers. A lithologic layer primarily consists of:
The bottom depth of the lithologic layer can either be specified or the top depth of the next lithologic layer is used.
The lithologic descriptions are usually displayed in a Description column and the lithologic symbols are usually displayed in Symbol column. The lithology of the borehole log can be entered and edited by:
After performing one of the above tasks, the Lithology List form will be displayed. The following information can be entered and edited using this form:
Top: This is the top depth of the layer and should be between the start and end depths of the borehole.
Bottom: The bottom depth of the layer is optional. If it is not specified or is less than the top depth, the top depth of the next layer is used.
Symbol: This is the symbol used for the layer in the Lithology Symbol column. The symbol can be changed by clicking on it with the left or right mouse buttons. For more information see the section on Changing the Lithologic Symbol below.
Name: This is the strata name for the layer selected from the list of lithologic macros. It is used to quickly fill in the symbol, title, and description of the layer using the information specified in the lithology macro. It is also used in WinFence version 2 to quickly and accurately automatically generate strata for the cross-section.
If the template for the borehole log specifies the Title Edit mode as “Text” for the lithology description column and the location map specifies that “All layer information” is to be used for automatically generating cross-sections, the Name column will not appear on this form. For more information see the section on Selecting Strata Names below.
Title: The optional name of the layer (up to 255 characters) is displayed above the description.
Description: The description is used to describe the lithology of the layer. There is no limit to the length of the description. At the left of the form there is a Rich Text toolbar that is used to format the description, add symbols, insert lithology macros, and perform spell checking on the description. The use of the Rich Text toolbar is described section below on Specifying the Lithology Description.
Top Line Style: This is the line style to be used for the top layer boundary. If the bottom depth is specified this line style is also used for the bottom boundary. When the line is clicked on in the column a Line Properties form is displayed. This form is used to set the line style, thickness, and color. The line style can be set to none to display no line at the boundary.
The column widths on the form can be adjusted by sliding the column boundaries using the left mouse button in the column header. At the bottom right of the form there is a Reset Columns button that can be used to reset the column widths to the default settings.
At the bottom of the form there are buttons for the following: