WellCAD Basics - Advanced Logic Technology

BOOK 1 - WELLCAD BASICS - 143
If Well, Mud or Interval Logs have been chosen a new Interval Log will be created
for the graphical output. For all remaining logs a Percentage Log will be created for
the graphical output. If a text output has been chosen, a Comment Log will be
created. The displayed text is usually a combination of the name of the statistical
parameter and the computed value.
Please note that the Average for a Lithology log is the output of the composition over
the computation interval. Thicknesses of equal elements will be summarized and
expressed in percentage and total thickness. If Maximum or Minimum has been
selected the type and thickness of the component with the smallest / largest
cumulative value will be output.
Where available the Normalized Sum option divides the sum of all data values over
the reference interval by the interval length. With the Area option selected each data
value will be multiplied by the sample step and all segments in the reference interval
added to compute the area under the curve.
Processing Parameter:
If the Resolution parameter is not zero a transition zone at the top and bottom of
each process interval will be created. The width of this zone is ½ of the Resolution
set. Data points lying in the transition zone are assumed to be affected by the
neighboring intervals and are excluded from the computation.
Transition zone
Interval of calculation
Values lying in the transition zone (1/2 Resolution) are skipped
In case no data can be found in the interval of calculation the process either
interpolates between the nearest values at top and bottom of the interval, the min or
max of the nearest value is taken or no value is output. The user can select the
desired behavior from the corresponding drop down list.