| FEATURES |
| Digital down-hole measurement avoids
errors due to cable effects in deeper boreholes |
| Constant-power down-hole current
source give 4 decades of measurement without manual
range switching |
| Automatic real-time correction for
borehole diameter and well-fluid resistance |
| Optional natural-gamma measurement
and temperature |
| MEASUREMENTS |
| 16" Normal
resistivity |
| 64" Normal
resistivity |
| Single-point resistance |
| Self potential (SP) |
| Natural-gamma |
| Temperature (optional) |
| 8" and 32" Normal
resistivity (optional) |
| APPLICATIONS |
| Water |
Determination of water quality
Indication of permeable zones and porosity |
| Engineering/Minerals |
Bed-boundary positions
Strata correlation between boreholes |
| OPERATING
CONDITIONS |
| Borehole type |
Open-hole, water-filled |
| |
The bridle top must be immersed
in well fluid, restricting top logging depth to 10m
below the fluid level. A short bridle may be used to
allow resistivity logging to within 3m of the fluid
surface. However, 64" normal results in this case
will be qualitative. Best results are obtained in fresh
mud with low to medium formation resistivities. |
| SPECIFICATIONS |
| Diameter |
44mm |
| Length |
2.55m (2.93m with 8" and 32" Normal
option) |
| Weight |
9.8kg |
| Max. temperature |
70ºC (extended range available) |
| Max. pressure |
20MPa (extended range available) |
| Resistivity range |
1 to 10,000 ohm-m (alternative ranges
available) |
| Range SP |
-1V to +1V |
| Current return |
Cable armour |
| Voltage reference |
Surface fish |
| Natural-gamma detector |
50mm x 25mm NaI(Tl) scintillation
crystal (larger sizes available) |
| SALES INFORMATION |
| Probe |
| 25 055 000 |
Electric log (ELOG) probe |
| 25 056 000 |
Electric log with natural gamma |
| 25 054 000 |
includes natural gamma and temperature |
| 25 067 000 |
includes 8" and 32" Normal
Resistivity at bottom |
| Accessories |
| 20 015 000 |
10m bridle |
| 20 101 000 |
Surface earth stake (fish) |
| 20 100 000 |
ELOG testbox |
| 24 001 000 |
Sinker bar for use in dense muds |
| 20 074 000 |
Natural-gamma API calibrator without
source |
| 20 070 000 |
Natural-gamma API calibrator without
source |
| 30 010 000 |
3.7MBq 137Cs source for natural
gamma calibrator |
