归一化磁源强度方法对磁异常识别对比分析

Comparative Analysis of Normalized Magnetic Source Intensity Method for Magnetic Anomaly Recognition

磁异常的场源位置识别是磁异常资料处理解释的一项重要工作,但实际工作中存在多种因素影响导致不能直接准确识别场源体位置。针对实际工作中存在的问题,对12种磁异常识别方法进行研究。通过建立组合模型,对比分析各方法在不用磁化方向、不同场源形态和噪声干扰3种因素下的边界增强效果、优缺点及适用条件。理论模型试验证明了在强剩磁情况下,归一化磁源强度相对于其他识别方法具有更好识别效果,这在实际工作中为磁异常识别方法的选取提供了一个有利的参考。

The field source location identification of magnetic anomalies is an important task in the processing and interpretation of magnetic anomaly data.However,in actual work,there are many factors that make it impossible to directly and accurately identify the location of the field source.Aiming at the problems in actual work,this paper studies 12 magnetic anomaly recognition methods.By building a combination model,compare and analyze the boundary enhancement effect,advantages and disadvantages and applicable conditions of each method without magnetization direction,different field source shapes and noise interference.The theoretical model test proved that in the case of strong remanence.The normalized magnetic source intensity has a better recognition effect than other recognition methods.This provides a favorable reference for the selection of magnetic anomaly identification methods in actual work.