Designed for measuring apparent electrical resistivity (ρa) with simultaneous and forced switching of the sondes configuration (normal sonde-lateral sonde), as well as the spontaneous potential (SP) of rocks.
The electrical resistivity is measured by the method of excitation of the medium by an alternating electric field by AB electrodes and by measuring the voltage drop across the electrodes MN. SP measurement is performed when the external electric field is turned off.
The downhole tool is to be run with VULCAN V3 log recorder or similar.
The tool operates with one-core (SP record restriction) or three-core logging cable.
The dimensions of the sonde are made upon request.
SPECIFICATIONS
| Sonde spacing: - normal sonde - lateral sonde | N 1,0 M 0,1 A А 1,0 M 0,1 N |
| ρa measurement range, Ohm·m | 1-5000 |
| SP measurement range, mV | ± 1000 |
| Measurement main relative error, % | 5 |
| Downhole tool supply voltage, V | 40-50 |
| Rated supply current, mA | 120 |
| Output code | Manchester-2 |
| Maximum operating temperature, °С | 80 |
| Maximum hydrostatic pressure, MPa | 20 |
| Diameter, mm | 43 |
| Length, without sonde, mm | 900 |
| Length with sonde, mm | 3000 |
| Weight, kg | 10 |
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