WellCAD Basics - Advanced Logic Technology

118 - BOOK 1 - WELLCAD BASICS
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In the Options field the user can select whether the information contained in the
WellCAD header should be transferred to the LAS file “~PARAMETER
INFORMATION” section or not. Independent if the Export Header Info option
is set or not, the export algorithm will try to fill the “~WELL INFORMATION”
block of the LAS header automatically. In order to match WellCAD header words to
the labels used in the “~WELL INFORMATION” block click the button next
to the Export Header Info string. An editor window will open allowing to choose from
the WellCAD header words (click into the corresponding cell in the Header Field
column). The mnemonics shown in the Name column are the default entries for the
LAS header described by the Canadian Well Logging Society.
If more than five data channels are selected the data for each sample point will be
written on multiple lines – also known as Wrap mode. This behavior can be enabled
or disabled with the Enable Wrap option.
For a full description of the LAS format please visit the homepage of the Canadian
Well Logging Society (CWLS) www.cwls.org.
1.4.5.3 Exporting Data in ASCII Format
Exporting data in ASCII format implies writing the data column delimited into an
ASCII file. The different extensions – TXT, CSV, ASC and WA*- refer to different
column delimiters used (e.g. TXT files are comma or Tab separated, CSV, ASC and
WA* use a comma) or a slight difference may exist in the data layout. An ASC files
contains an additional blank line after title and unit line. The WellCAD ASCII
(WA*) is a native WellCAD format. The third letter in the file extension refers to a
particular log type and will automatically be recognized when imported into
WellCAD – which means the log type will automatically be chosen.
To export one particular data channel (the data of a single log):
� Select the log that should be exported.
� Go to the File >Export >Single File menu.
� In the File Export dialog box two file types are offered. Select either the
TXT or WA* file type. Besides the file extension there will be no
difference in the file format. The advantage of the WA* format is that the
log type will automatically be chosen when importing the data. Importing a
TXT file requires the Text File Import Wizard to be run.
To export multiple logs into separate WA* files: