WellCAD Basics - Advanced Logic Technology

140 - BOOK 1 - WELLCAD BASICS
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Resample with a constant sample rate:
In order to up- or down-sample the data in the selected Well Log(s) enter a new
sample rate into the corresponding edit box. If necessary interpolated data values
will be inserted.
Use sample rate of a reference log:
Sometimes it might be required to extract data from a Well Log at distinct depth
locations (e.g. positions where plugs from a core were taken and detailed core
analysis results are available) and store the results in a new Mud Log. The process
will create a new Mud Log with depth positions being derived from a reference log.
The reference can be selected from the corresponding drop down list. Mud or
Percentage Logs can be chosen. As the requested depth location could fall between
two samples of a Well Log the user has the option whether to take the nearest value
or get an interpolated value.
Well Log to resample
Reference Log
Resulting Mud Log
Reference Log (left) provides the depth positions at which data from the original log (middle) will be extracted
and saved into new Mud Log (right)
1.5.9 Creating Blocked Curves
This process allows calculation of statistical values, such as average, standard
deviation, minimum and maximum, of Log data for given depth intervals. The
results are output either as text (Comment Log) or graphics (Interval or Percentage
Log) depending on the input log type. The intervals of calculation are read from a
reference log or can be entered by the user. Any log dealing with depth intervals –
storing a top and a bottom depth as data – can be used as reference log.