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本文提出一种依据低频(<1百万赫兹)井间电磁测量值导出空间电导率分布的快速成像技术。场源为正弦振荡。呈垂向方位的磁偶极予。并假定散射体在源偶极子轴周围呈对称分布。采用这种几何模型后使得三维矢量问题简化为更易于处理的二维标量形式。通过使用非线性积分方程导出的伯恩级数近似式可进一步提高效率。该方程考虑到了层状介质中非均匀嵌层所产生的散射磁场。通过使用边界约束条件及
This paper presents a fast imaging technique that derives the spatial conductivity distribution based on low-frequency (<1 million hertz) crosswell electromagnetic measurements. The field source is sinusoidal oscillation. Dipole magnetic dip for vertical orientation. It is assumed that the scatterers are symmetrically distributed around the source dipole axis. Using this geometric model simplifies the three-dimensional vector problem to a more scalable two-dimensional scalar form. Efficiency can be further improved by approximating the Bourne series using a nonlinear integral equation. The equation takes into account the scattering magnetic field generated by the non-uniform layering in the layered media. By using boundary constraints and