Magnetic tension gradient data balance boundary identification method based on analysis signals

Abstract

The present invention discloses a magnetic tension gradient data balance boundary identification method based on analysis signals. The method comprises the following steps of: S1, analyzing signal features based on a magnetic tension data direction, and establishing a reasonable analysis signal ratio function to achieve boundary identification work; S2, employing the ratio function to balance effects of geologic bodies with different depths, employing a balance boundary identification technology of different order derivative ratios of direction analysis signals, and obtaining a convergent boundary result; S3, employing a balance boundary identification filter based on the analysis signal ratio to obtain the range of the geologic bodies; and S4, enhancing the resolution of the boundary identification result based on a step balance boundary identification filter based on the analysis signal derivative ratios. The magnetic tension gradient data balance boundary identification method basedon analysis signals can accurately and clearly give the regional mineral distribution, improves the resolution of geologic bodies with large depths while reducing the inclination magnetization interference, and has a large application prospect for the deep mineral resource exploration.

Description

technical field [0001] The invention belongs to the technical field of earth sciences, and more specifically relates to a method for identifying the equalization boundary of magnetic tensor gradient data based on analytical signals. Background technique [0002] The magnetic tensor gradient is the rate of change of the magnetic vector in different directions, which can better describe the geometry of the field source. Magnetic tensor gradient data has the advantages of high precision, high resolution, and multiple parameters, and can describe the distribution of magnetic bodies more accurately, and has important uses in mineral resource exploration. However, the magnetic tensor gradient data will still be disturbed by the oblique magnetization, which will make the abnormal shape irregular, which brings difficulties to the interpretation. Analytical signals have the advantage of being less disturbed by oblique magnetization, but the analytical signals attenuate severely with...

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Problems solved by technology

However, the magnetic tensor gradient data will still be disturbed by the oblique magnetization, which will make the abnormal shape irregular, which brings difficulties to the interpretation

The analytical signal has the advantage of being less disturbed by inclined magnetization, but the analytical signal attenuates seriously with the increase of depth, so it cannot be used alone to identify the boundaries of deep geological bodies.

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