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相对于传统磁异常数据,磁梯度张量数据可以提供有关异常体更多的信息,分辨率更高,具有广阔的应用前景.本文给出了基于磁梯度张量解析信号进行边界增强的新方法,该方法是通过对异常垂向一阶导数与z方向解析信号的比值做归一化得到的,其零值线位置可以很准确的反映出地质体边界位置,而且可以有效降低噪声的干扰.文中还证明了异常垂向一阶导数与x、y、z三个方向解析信号的比值同样满足欧拉齐次方程,且在计算过程中不需考虑构造指数N的影响,避免了因构造指数不当而引起的反演误差.通过对单一地质体及组合地质体模型的实验证明:与常规欧拉反褶积法相比,该反演方法能够更好的得到地质体界面及深度信息,所得的解更集中.将其应用到保定实测数据中,获得了更精确的场源信息.
Compared with traditional magnetic anomaly data, magnetic gradient tensor data can provide more information about the anomalous body, with higher resolution and wide application prospect.This paper presents a new method of boundary enhancement based on magnetic gradient gradient tensor analysis This method is obtained by normalizing the ratio of the first derivative of the abnormal vertical direction to the analytic signal in the z direction. The zero line position can accurately reflect the boundary position of the geological body and can effectively reduce the noise interference. The paper also proves that the ratio of the anomalous vertical first derivative to the analytic signals in x, y and z directions also satisfies the Euclidean equation, and does not need to consider the influence of the tectonic index N in the calculation process and avoids the influence of the structural index Inversion of errors caused by improper.Through the experiment of single geological body and combined geological body model, it is proved that the inversion method can get the geological body interface and depth information better than the conventional Euler deconvolution method, The solution is more concentrated, which is applied to the measured data in Baoding to obtain more accurate field source information.