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水平井射孔井段的井眼附近若有泥质夹层，无疑对水平井提高采收率是很不利的。在忽略井眼的侵入影响并将发射线圈近似为点状磁偶极子的条件下，可用水平层状的三层介质模型来模拟井眼附近存在泥质夹层时双感应仪器的响应特性。通过分析响应曲线制作出一整套确定夹层位置和厚度的解释图版。在已知夹层和目的层电阻率的条件下，通过解释图版可用双感应资料求出夹层的位置和厚度；若井眼附近无泥质夹层，解释图版将退化为一点。
Horizontal well perforated section near the wellbore if muddy intercalation, no doubt on the horizontal well to enhance oil recovery is very unfavorable. Ignoring the influence of borehole intrusion and approximating the transmitting coil as a point-like magnetic dipole, the layered three-layer media model can be used to simulate the response of dual-sensing instruments with muddy interlayers near the borehole. Through the analysis of the response curve to create a set of explanations to determine the position and thickness of the sandwich plate. Knowing the resistivity of the mezzanine and the target layer, the position and thickness of the mezzanine can be determined by interpreting the plate with double sensing data. If there is no muddy interlayer near the hole, the interpretation plate will degenerate to a point.