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将双侧向测井（ＤＬＬ）电极系的一小段近似看成一点电极，则电极系在空间任一位置产生的总电位为各点电极电位沿电极系水线积分，考虑到电极系电流密度分布的不均匀性，计算了深、浅侧向的电机系系数，其计算值与实验值的相对误差分别为３．１％和６．８％。在水平井中，假设电极系轴平行于地层界面，忽略井眼和侵入带的影响（其影响另行考虑），利用镜像法求解的结果表明：对于两层模型，邻层对深侧向（ＬＬｄ）的影响明显大于浅侧向（ＬＬｓ）；对于三层模型，层厚大于６ｍ时，围岩对浅侧向响应几乎无影响，对深侧向层厚即使大于１５ｍ围岩影响仍然较大；地层厚度一定时，浅侧向的视电阻率响应对仪器商界面距离的变化敏感，而对于深侧向，高阻地层中的响应对仪器离界面距离敏感，低阻地层的响应几乎与仪器商界面的距离无关。
Taking a short section of the double-sided logging (DLL) electrode system approximately as a one-point electrode, the total potential generated by the electrode system at any position in the space is the potential at each of the electrode points integrated along the electrode system waterline, considering the electrode system current density Distribution of inhomogeneity, the deep and shallow side of the motor coefficient was calculated, the calculated and experimental values of the relative errors were 3.1% and 6.8%. In a horizontal well, assuming that the electrode axis is parallel to the formation interface, ignoring the influence of the borehole and invaded zone (the effects of which are separately considered), the results of the mirror image method show that for the two-layer model, Is obviously larger than shallow lateral (LLs). For the three-layer model, when the layer thickness is more than 6m, the surrounding rock has little influence on the shallow lateral response, while the influence on the deep lateral layer thickness is still larger than 15m; For a given thickness, the shallow lateral apparent resistivity response is sensitive to the change of the distance between the instrument interface and the response in deep lateral and high resistivity formations, which is sensitive to the distance from the interface. The response of the low resistivity formation is almost the same as that of the instrument interface Has nothing to do with the distance.