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SGR-ICDP (Logging tool)

Model id: Spectrum Gamma Ray, Antares, SN: 1417001


  • wavelength/energy spectrum of the natural gamma radiation
  • total natural gamma

Purpose: content of Uranium, Thorium & Potassium

Characteristics: gamma ray scintillation detector with spectrum photo multiplier yields a full energy-frequency spectrum of the natural GR radiation, from this a best fit algorithm determines the content of the 3 elements U, Th, K; GR spectrum, U [ppm], Th [ppm], K [%], GR [gAPI]


Vertical resolution:0.200 m
Penetration depth:0.300 m
Typical logging speed:2.00 m/min
Maximum pressure:80.0 MPa
Maximum temperature:150℃
Maximum boreholedeviation:50°
Required boreholefluid:
no requirementsNo special requirements with regard to the borehole fluid.
Minimum borehole diameter:0.075 m
Maximum borehole diameter:0.250 m
Type of datatransfer:
cableData are transferred in real time via a cable.
Required type of logging cable:
4/7 conductor4 & 7 conductor cable types are possible.
Required cablehead:
GO7Connector according to GO 7 standard (7 conductors).
Implement search on winches with this cable head.
Type of signal:
digitalDigital signal transmission.
Maximum cable length:7000 m
Acquisitionsystem (recommended):Antares-ICDP
Length:2.60 m
Maximum diameter:0.052 m
Weight:18 kg
Belongs to toolstring:
Antares telemetryAlways in combination with and only with the Antares Telemetry Sub TS.
Usage conditons:Only non-commercial research is allowed/welcome.
Additional usage conditions:Logging as service by ICDP OSG
Additional information available at:https://www.icdp-online.org/fileadmin/icdp/services/img/Logging/OSG_Slimhole_Sondes_Specs_pics_01.pdf

Operator and contact:

Operator:GFZ German Research Centre for Geosciences, Centre for Scientific Drilling
Contact person:Jochem Kück
Telephone:+49 3312881087
Address: Telegrafenberg
Building A69
14473 Potsdam, Germany

End of I-EDDA database record