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常规的反演方法是对感应测井资料进行线性反褶积。由于感应测井获得的响应曲线是地层非线性时变滤波的结果,所以,感应测井响应可随地层电导率发生非线性变化。用相量反褶积方法分别设计出实部信号和虚部信号所对应的反滤波因子,对反映测井响应随电导率非线性变化的非线性函数进行了拟合,用设计出的滤波因子及被拟合出的非线性函数对模拟相量感应测井资料进行了相量反褶积。处理结果表明,围岩效应和趋肤效应基本被消除
The conventional inversion method is linear deconvolution of the induction logging data. Since the response curve obtained by induction logging is the result of non-linear time-varying filtering of the formation, the induction logging response can vary non-linearly with the conductivity of the formation. The inverse filter factors corresponding to real signal and imaginary signal are respectively designed by phasor deconvolution method. The nonlinear function that reflects the non-linear change of log response with conductivity is fitted. The designed filter factor And the fitted non-linear function was used to deconvolved the phasor-induced logging data. The treatment results show that the surrounding rock effect and skin effect are basically eliminated