WellCAD Basics - Advanced Logic Technology

Code recorded as data, it refers to
a symbol or pattern.
BOOK 1 - WELLCAD BASICS - 129
Examples of log types dealing with symbols and patterns: Litho Log (repeated patterns), Litho Log (nonrepeated
patterns), CoreDesc Log and Analysis Log
All of these logs have in common that they do not store the actual pattern or symbol
as data but an alphanumeric code.
Sample of Lithology Log data. A code refers to a lithology pattern.
This code is used to find a certain symbol or pattern in a separate library and display
it on screen. The log types mentioned above have always one, and only one, pattern
library attached, which is stored together with the log’s data. If necessary, a new
library can be loaded using the log’s Main Settings. Doing so, the user must be aware
that the already stored symbol codes might become meaning less afterwards as they
do not refer to a valid pattern anymore.
The pattern libraries, also referred to as litho dictionaries, can be created in
LithCAD, a special pattern editor application that is usually installed together with
WellCAD. Library files carry the extension *.LTH. LithCAD provides all tools
necessary to design and build customized lithology patterns and to store and
organize them in libraries. Each pattern within a library is uniquely identified