磁梯度张量解析信号分析法及其在场源位置识别中的应用
发布时间：2018-09-18 09:55
【摘要】：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.
[Abstract]:Compared with the traditional magnetic anomaly data, the magnetic gradient Zhang Liang data can provide more information about the abnormal body and have higher resolution, so it has a broad application prospect. In this paper, a new method of boundary enhancement based on magnetic gradient Zhang Liang analytical signal is presented. The method is obtained by normalizing the ratio of the anomalous vertical first derivative to the z direction analytical signal. The position of zero line can accurately reflect the boundary position of geological body, and it can effectively reduce the noise interference. It is also proved that the ratio of the anomalous vertical first order derivative to the analytical signal in the three directions of xyniz satisfies the Eulerian homogeneous equation, and the influence of the structural exponent N is not considered in the calculation process, and the inversion error caused by the improper construction index is avoided. The experiments on the single geological body and the combined geological body model show that compared with the conventional Euler deconvolution method, the inversion method can obtain the interface and depth information of the geological body better, and the solution is more concentrated than that of the conventional Euler deconvolution method. More accurate field source information is obtained by applying it to the measured data of Baoding.
【作者单位】： 中国国土资源航空物探遥感中心;中国地质大学(北京)地球物理与信息技术学院;
【基金】：国家高技术研究发展计划“863计划”(2013AA063905) 航空物探方法技术与数据处理解释系统研究(1212011087010) 海洋地质保障工程综合数据库建设(航遥中心)(GZH201200513)联合资助
【分类号】：P631.2
本文编号：2247541
[Abstract]:Compared with the traditional magnetic anomaly data, the magnetic gradient Zhang Liang data can provide more information about the abnormal body and have higher resolution, so it has a broad application prospect. In this paper, a new method of boundary enhancement based on magnetic gradient Zhang Liang analytical signal is presented. The method is obtained by normalizing the ratio of the anomalous vertical first derivative to the z direction analytical signal. The position of zero line can accurately reflect the boundary position of geological body, and it can effectively reduce the noise interference. It is also proved that the ratio of the anomalous vertical first order derivative to the analytical signal in the three directions of xyniz satisfies the Eulerian homogeneous equation, and the influence of the structural exponent N is not considered in the calculation process, and the inversion error caused by the improper construction index is avoided. The experiments on the single geological body and the combined geological body model show that compared with the conventional Euler deconvolution method, the inversion method can obtain the interface and depth information of the geological body better, and the solution is more concentrated than that of the conventional Euler deconvolution method. More accurate field source information is obtained by applying it to the measured data of Baoding.
【作者单位】： 中国国土资源航空物探遥感中心;中国地质大学(北京)地球物理与信息技术学院;
【基金】：国家高技术研究发展计划“863计划”(2013AA063905) 航空物探方法技术与数据处理解释系统研究(1212011087010) 海洋地质保障工程综合数据库建设(航遥中心)(GZH201200513)联合资助
【分类号】：P631.2
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