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应用混合法给出了水平层状各向异性介质中侧向电阻率测井的快速正演算法，理论模型的计算结果证明，各向异性介质中侧向电阻率测井的响应主要受横向电阻率影响，且响应的振幅完全由横向电阻率的大小确定。同时研究了薄交互层的响应与各向异性介质响应的等价性问题，对于砂、泥岩薄交互储层，当组成薄交互层的各个单层的厚度小于０．１ｍ时，薄交互层的响应与等效的各向异性介质的响应基本上是一致的，很难从其电阻率的响应中了解到实际地层电阻率的真实变化情况。
A fast forward algorithm of lateral resistivity logging in horizontal layered anisotropic media is given by using hybrid method. The theoretical results show that the response of lateral resistivity log in anisotropic media is mainly affected by lateral resistance Rate of influence, and the amplitude of the response is completely determined by the magnitude of the transverse resistivity. At the same time, we study the equivalence between the response of thin interaction layer and the response of anisotropic medium. For the thin sand and mudstone thin interactive reservoir, when the thickness of each single layer which constitutes thin interaction layer is less than 0.1m, The response is basically the same as the response of an equivalent anisotropic medium, and it is difficult to know the real change of the formation resistivity from its resistivity response.