QL40-IP – Induced Polarization
Description
The QL40-IP Induced Polarization probe combines a quadruple spacing normal resistivity tool and dual spaced induced polarization tool to measure the electrical resistivity, spontaneous 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 stackable within the QL (Quick Link) product line or it can be run as a standalone tool.
Applications
- Detection of disseminated pyrite in sedimentary rocks
- In uranium roll-front deposits, which sometimes show higher concentrations of pyrite
- In coal seams to detect pyrite or other ferrous material
- Detection of sulfides in igneous and metamorphic rocks
- Identify montmorillonite clay in sedimentary depositional systems
Operating Conditions
Borehole Fluid[X] Water [X] Mud [] Dry Casing[X] Uncased [] PVC Borehole [] Steel Centralization[] Required [X] Not Necessary Isolation Bridle[X] Required [_] Not Necessary
Features & Benefits
- Real time recording and display of entire current injection and decay cycles (full waveform digitization of electrode voltage and injection current with downhole real time digital processing)
- Four resistivity measurements are recorded compared to two offered by most other manufactures
- Full measurement range and accuracy is achieved without the need for manual range switching
- User defined injection current cycle timing (custom ‘On’ and ‘Off’ times for IP measurements)
- Ultra slimline 43 mm OD and easy one-person operation
Specifications – Metric/English
| Specification | Metric | Imperial |
|---|---|---|
| Diameter | 43 mm | 1.7" |
| Length | 1.9 m | 74.8" |
| Weight | 9 Kg | 19.8 lbs. |
| Max. Temp. | 70ºC | 158ºF |
| Max. Pressure | 200 bar | 2900 psi |
Sensor: Stainless steel electrode Chargeability: Measured over 10 windows per spacing IP Resolution: 1.2 µV IP Input Impedance: 1.4 MOhm Cycle Timing: User defined 100 to 4000 ms (1 ms resolution) Resistivity Range: 0.1 to 100,000 Ohm-m Resistivity Accuracy: 1% Full Scale SPR Range: 0.1 to 100,000 Ohm SP Range: ± 18 V SP Accuracy: ± 2.5 mV SP Resolution: 0.5 mV
QL Stack Possibilities
- QL40IP + QL40GR (Gamma) + QL40MGS (Magnetic Susceptibility): Mining, Exploration
- QL40IP + QL40GR (Gamma) + QL40OBI (Optical Televiewer) or QL40ABI (Acoustic Televiewer): Exploration, Bedding Planes, Fractures
- QL40IP + QL40SGR (Spectral Gamma): Clay Typing, Detection of Sulfides
- QL40IP + QL40GR (Gamma) +QL40FTC (Fluid Res, Temp): Hydrogeologist’s Tool, Groundwater exploration and assessment