Three-component downhole magnetometer based on high-temperature digital fluxgate

Abstract

The invention discloses a three-component downhole magnetometer based on a high-temperature digital fluxgate. The three-component downhole magnetometer comprises a closed pressure-bearing cabin shell; a three-axis fluxgate sensor, which is used for measuring the magnetic field intensity of a magnetic substance outside the three-component well magnetometer based on the high-temperature digital fluxgate; a three-component quartz accelerometer which is used for collecting acceleration data; a fluxgate signal processing circuit which is used for performing digital processing on a signal sensed by the three-axis fluxgate sensor, performing temperature correction processing on the signal subjected to digital processing, and performing error correction processing on data subjected to temperature correction processing and acceleration data acquired by the three-component quartz accelerometer; a power supply circuit; a buffer; and a support skeleton; wherein the three-axis fluxgate sensor, the fluxgate signal processing circuit, the three-component quartz accelerometer and the power supply circuit are all arranged in the closed pressure-bearing cabin shell. The magnetometer can work in a high-temperature mine environment.

Description

technical field [0001] The invention relates to the field of mineral resource exploration, in particular to a three-component well magnetometer based on a high-temperature digital fluxgate. Background technique [0002] With the rapid development of my country's modernization, the country's demand for mineral resources is increasing. At present, my country's deep mineral resource exploration technology and equipment are highly dependent on foreign countries. These equipment have shallow detection depth, low precision, and inaccurate positioning, which seriously restricts the effective detection of my country's deep mineral resources. [0003] The logging instruments used in the exploration and development of deep mineral resources work in an environment of 155°C for a long time. The working temperature of the fluxgate sensors used in the existing three-component magnetometers in wells in China is basically normal temperature, so it is not suitable for the high-temperature w...

AI Technical Summary

Problems solved by technology

The working temperature of the fluxgate sensors used in the existing three-component magnetometers in wells in China is basically normal temperature, so it is not suitable for the high-temperature working environment in mines; in addition, most of the fluxgate sensors used are analog, And the steering difference is large, so its accuracy is low

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