Gamma Ray Tool (Well-Sun)

The Gamma Ray Tool (GRT) measures the natural gamma rays generated from the formation that surrounds the wellbore.

Product summary

The sensor comprises a 4" sodium iodide scintillator, a photomultiplier and a 1.6kV high voltage power supply. The GRT is compactly designed and offers good sensitivity and high resolution for use in cased-hole production logging operations. The GRT, combined with other tools, may be used for flow tracer work and, with the addition of a gamma source, for gravel pack investigations.


  • Lithological identification

  • Depth correlation

  • Identification of radioactive scale

  • Tracer monitoring

  • Gravel pack monitoring (with an addition gamma source)

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