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采用水平多层介质测井模型,给出了沿任意方向的偶极子源在介质空间电磁响应的理论公式,利用递推方法可以很方便地进行数值计算.针对存在薄围岩夹层的情况,利用水平5层介质模型,在典型的地层参数与测量条件下,计算了轴向与径向的磁和电的4种偶极子源的不同物理参量的理论测井曲线,系统考察了围岩、薄夹层的影响与分层能力.
The theoretical model of electromagnetic response in dipole source along arbitrary direction is presented by using horizontal multi-layered media logging model. The recursive method can be used to calculate the electromagnetic field easily. Aiming at the existence of thin surrounding rock intercalation, the theory of different physical parameters of magnetic and electric four dipole sources in axial and radial directions was calculated under typical formation parameters and measuring conditions by using a horizontal five-layer model. Logging curve, the system investigated the influence of surrounding rock and thin interlayer and stratification ability.