WellCAD Basics - Advanced Logic Technology

130 - BOOK 1 - WELLCAD BASICS
1.5.3 Using Contact Styles
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through an alphanumeric code set by the user. In addition, a description can be
given to each pattern. For more details about LithCAD please refer to the LithCAD
User’s Guide. The Dictionaries folder in the WellCAD installation directory usually
contains numerous predefined library files (*.LTH) that can be loaded into Lithology
Logs.
One has to distinguish between repeated patterns and non-repeated symbols.
Repeated pattern (left) and non- repeated symbol (right)
Repeated patterns use a generic cell, which is repeated as long as a region or box is
completely covered. A non-repeated symbol is displayed once at a distinct position.
Both types can be designed in LithCAD, stored in .LTH library files and displayed in
the litho log types. Most of the time repeated patterns are used to show lithology or
sedimentary structures, but can also be used to express rock color or chrono
stratigraphic data. Non-repeated symbols are mostly used as qualifiers, accessories,
fossils, etc.. The Lithology, Analysis, Percentage and Stratigraphic Log types are
normally used with repeated patterns. A CoreDesc Log is used with non-repeated
symbols.
To learn how to insert new lithology logs and insert patterns and symbols please
refer to the corresponding paragraphs in Appendix A.
The top and bottom boundaries of lithology beds and boxes of the stratigraphic log
are graphically presented as straight lines. To present the box limits in a more
significant manner to reflect i.e. a certain contact type between lithology beds,
major/minor tops or unconformities a Contact Dictionary can be designed or
loaded from a file (*.CDT).