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相量感应测井的关键在于同时精确测量R信号和X信号,利用相量反褶积反演地层参量。本文采用自适应滤波法对线圈系在平面成层介质中的响应场进行快速求解;基于几何因子理论用最小平方滤波法设计出了相量反褶积中的三个滤波因子。对模拟地层反演计算结果表明,在较大的电导率范围内,基本上消除趋肤效应影响,有效地改善了线图系的薄地层识别能力。
The key to phasor logging is to accurately measure R and X signals at the same time, and to invert the formation parameters by phasor deconvolution. In this paper, the adaptive filter method is used to solve the response field of the coil system in the plane stratified medium. Three filter factors in the phasor deconvolution are designed by the least square method based on the geometric factor theory. The calculated results of simulated stratigraphic inversion show that within the larger conductivity range, the skin effect is basically eliminated and the thin stratigraphic identification ability of the line graph system is effectively improved.