WellCAD Basics - Advanced Logic Technology

BOOK 1 - WELLCAD BASICS - 157
Log: Select the log containing the corrected count rate.
K-Factor: Click into the edit box to open the Formula dialog box. Enter a number
or compose a formula (see 1.5.1 Formula Parser). The factor specified in the
formula line will be multiplied with the data values of the selected log. In case the
equation contains a reference to the selected log the final multiplication will be
skipped. E.g. the equations 2*0.00001028 and 2*0.00001028*{GAMM-Corrected} for
the sample shown in the dialog box above will give the same result.
As the calibration coefficients or equations are tool specific you can store the
information in a configuration file (e.g. same *.ini file used for the borehole
condition factors). Click the Save button to store the calibration information in the
*.ini of you choice or use the Load button to reload the information. By default the
last used parameters are loaded when opening the dialog box.
1.5.13.6 Process Spectral Gamma Data
Before the spectral gamma data can be interpreted a calibration model must be set
up (see 1.5.13.7 Window Based Model). The model contains information about the
energy windows to be evaluated (stripping factors), conversion factors to be applied
(e.g. to convert count rates into concentration or weight percent of an element) and
remarks describing the probe and conditions under which the probe was calibrated.
Calibration models are saved as a binary file carrying the extension *.SGM (Spectral
Gamma Model).
SGM files should be generated and delivered by the tool supplier as the data
contained is the tool specific master calibration. Once the user opens a model file
(*.SGM) in the Process Spectral Gamma dialog box, details about model name,
type of process and remarks are displayed.
To process a data using an existing model file: