The JCH-2 magnetic susceptibility logging tool uses the principle of electromagnetic induction to measure the magnetic susceptibility parameters of the rock and ore in the well. The magnetic susceptibility of rock ores mainly depends on the content of magnetic minerals and the size, shape, and spatial distribution of mineral particles. Therefore, in different applications, the magnetic susceptibility logging results can be used to analyze and estimate the grade and mineral composition of ore, divide igneous rocks and divide. Certain metamorphic rocks.

1. Features:

1) The sensor is used to measure the well wall, and the measurement result is not affected by the size of the well diameter.
2) The vector measurement method is used in the signal detection, which removes the influence of the eddy current component in the induction signal, and the measurement result is more accurate.
3) The smaller the conductivity of the medium, the more accurate the measurement effect, so the effect is better when used in dry holes.

2. Main technical indicators

(1) Instrument size: 040x 1280mm
(2) Sensor: Electromagnetic sensor with a length of 5cm, working in a directional excitation mode, installed under the instrument, 1150mm from the top of the instrument
(3) Magnetic susceptibility (Xm) measuring range: 10~10000x10-+(SD) (two magnetic susceptibility)
(4) Measurement accuracy: 5% FoS
(5) Operating environment: 25MPa, 0~75°C
(6) Applicable well diameter: medium 55~0150mm
(7) Power supply: DC 200V+20%, <40ma<