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DLL-ICDP (Logging tool)

Model id: Dual Laterolog, Antares, SN: 1112002


  • electric rock resistivity, deep penetration
  • electric rock resistivity, shallow penetration
  • total natural gamma

Purpose: electric rock resistivity with two different depths of penetration

Characteristics: focused currents are induced into the borehole wall and the resulting voltage and current are measured with respect to a reference electrode at the surface, differently focussed electrodes record deep & shallow penetration depth; Rdeep, Rshallow [Ohmm], GR [gAPI]; depth of penetration: deep: 0.5-2, shallow: 0.3-0.7, depends on formation resistivity


Vertical resolution:0.200 m
Penetration depth:2.000 m
Typical logging speed:10.00 m/min
Maximum pressure:80.0 MPa
Maximum temperature:150℃
Maximum boreholedeviation:50°
Required boreholefluid:
conductive liquidThe borehole has to be filled with a conductive liquid.
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:3.50 m
Maximum diameter:0.043 m
Weight:26 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