基于分形插值的大地电磁静校正方法

鉴于协同克里格插值方法存在光滑效应的缺点,在前人工作的基础上,提出了基于分形插值技术的大地电磁静校正方法。该方法将分形技术与协同克里格法相结合,利用在二维构造情况下,静态效应使视电阻率曲线发生平移,对相位曲线无影响的特点,通过分析实测视电阻率和相位的空间分布特征及相关性,引入分形插值技术对受静态效应影响测点上的视电阻率对数进行插值计算,进而求取静态偏移因子。最后利用该方法进行了理论模型和实测数据试验,结果表明了该方法的正确性及有效性。

Method for Static Correction of MT Based on Fratal Interpolation

For the defects of smooth effect of co-Kriging, based on the former researches, the technique of MT static correction is proposed based on fratal interpolation. The technique is integrated with co-Kriging, the apparent resistivity is moved horizontally under static effect of 2D structure, while no influence is given on the phase curve. By analyzing measured apparent resistivity spatial distribution of phases and its correlation, the fratal interpolation technique is used to calculate the logarithm of the apparent resistivity on the point influenced by the static effects and static offset factors. The method is used for testing the theoretical models and measured data, the result shows that method is correct and effective.