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Minette
Consulting |
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25 Years of
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Consulting
MWD Gamma Calibration,
Software and Training About Minette
Consulting
Example Showing the Effects
of
Calibration, Collar &
Environmental Corrections
In this log
example, we will be using the sample calibration and the
corrections for an eccentered tool in an 8.5” borehole with 6.75” OD and 4” ID gold collar 1 and 14.4 lb
silver mud. In
this example, we see how the calibration, the collar correction, and
environmental correction all play a roll in obtaining an accurate API log.
[1] The gold collar effect is rather high
for a 1.375” thick collar, approximately 5.2.
Since gold is much denser than stainless steel, I deliberately used a
higher correction factor than is found in my software. But, the thickest collars do require
corrections of more than a factor of 5.