A depth correlation tool. The PGR measures the naturally occurring gamma ray radiation levels in the wellbore.
Gamma rays are emitted by naturally occurring isotopes that are associated with clays (K, Th, U). Rock with high content of clay (e.g. shale) will emit more gamma rays than rock with low clay content (e.g. sandstone or limestone).
PRODUCTION GAMMA RAY
|Sensitivity||1 count per API|
|Maximum Pressure||1030 bar/15,000psi|
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