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GR
Gamma Ray
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The PGR tool is a gamma ray spectrometer that is used to measure the naturally occurring radiation that is emitted by various formations to determine lithology. The PGR tool can also be used to detect radioactive scale. The PGR tool can be run in an open hole or cased hole environment.
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All PGR tools are compact, rugged and combine excellent sensitivity with high resolution. Gamma rays are detected by a Sodium Iodide scintillation crystal, amplified and counted, then sent to the appropriate telemetry tool. The detector is temperature compensated to minimize drift from the photomultiplier tube
Applications
• Depth correlation with other logs
• Determine formation profiles
• Estimate shale content in reservoir rocks
• Delineate stratigraphic boundaries for several production logs
• Identification of radioactive scale
• Tracer monitoring