In addition to its primary role as a lithological or clay indicator, a natural
gamma measurement is frequently used as the basis for establishing correlations
between boreholes and to ensure accurate depth matching between different logging
runs made in the same borehole. For these reasons, many LIM probes provide this
measurement as an additional log along with other parameters.
The GR38 probe provides a solution for cases where only a basic, total counts
natural gamma log is required.
Based on a ø25 x 50 mm NaI(Tl) scintillation crystal detector coupled to a
high-performance photomultiplier tube, the probe boasts excellent sensitivity
(±1.2 cps / API unit) and provides a high quality final result.
Lim designs, produces and commercializes measuring instruments and solutions dedicated to drilling.