Three-Lateral Resistivity Logging
Three-Lateral Resistivity Logging
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Basic Information
| Model | Diameter (mm) | Length (mm) | Weight (kg) | Pressure (MPa) | Working Temp. (°C) |
| PS2306 | Φ38 | 1100 | 7.50 | 25 | 0–85 |
| PSK3738 | Φ38 | 1150 | 5.00 | 20 | 0–85 |
Description
Three-lateral logging belongs to the focused electric-logging family and measures the lateral resistivity. Upper and lower guard electrodes A_P, together with the central measuring electrode A, supply currents of the same polarity, forcing the central-electrode current to be focused into a sheet that flows into the formation, thereby reducing the influence of borehole diameter and mud on the measurement. The armor serves as the B electrode, and the probe is isolated from the armor by an electric adapter (sub). The tool outputs four curves: lateral voltage, lateral current, lateral resistivity, and lateral conductivity.
This product line comes in two versions: digital and numerically controlled (NC). It is designed to meet the need for measuring lateral resistivity alone in small-diameter boreholes, and can simultaneously measure four parameters: lateral voltage, lateral current, lateral resistivity, and lateral conductivity.
It is currently widely used in coalfield, coal-bed methane (CBM), shale gas, hydrology, and radioactive uranium deposits.
Specification
| Parameter | Lateral Voltage | Lateral Current | Lateral Resistivity | Lateral Conductivity |
| Measurement Range | 0–5000 mV | 0–5000 μA | 1–10 kΩ·m | 0.1–1000 mS/m |
| Measurement Error | ±5% | ±5% | ±5% | ±5% |
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