Induced Polarization and Normal Resistivity
QL40 IP
(8’’, 16’’,32’’, 64’’, SP & SPR)
The tool is a combination of a quadruple spacing normal resistivity and dual spacing induced polarisation probe measuring the electrical resistivity, self potential and chargeability of rocks. A high chargeability response is an indication of the presence of metallic sulphides and oxides or cation-rich clays. The QL40 IP is an in-line sub.
It can be combined with other logging tools of the QL (Quick Link) product line to build tool strings. It can also be operated as a stand alone tool.
Temperature – Pressure
70°C (158°F)
200 bar (2900 psi)
Diameter – Length
43 mm (1.7”) w/ neoprene insulator
1.9 m (35”)
Weight
9 kg (19.8 lbs)
Measurements/Features
Chargeability Ma in [ms] on 16” and 64” electrodes
2 spacing full wave data
8”, 16”, 32” and 64” Normal Resistivity in [Ohm-m]
SP in [mV]
SPR in [Ohm]
Bridles
QL40 IS 1
QL40 IS 2
QL40 IS 4
Manufactured by Geotomographie GmbH
Technical Details
Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions
