Based on the skin effect geometrical factor theory and formation resistivity log method, the theory of the forward modeling of gradual change of filtrate-invaded zone front are discussed.

• 通过建立二维轴对称非均匀介质中感应测井的分析模型,基于趋肤效应几何因子理论及电磁感应原理测量地层电阻率的测井方法,论述了侵入带前缘倾斜地层的正演计算理论和方法。