电磁波测井计算介电常数算法比较研究

On the Comparisons Between Permittivity Algorithms in Electromagnetic Propagation Log

介绍了用平面波模型、球面波模型和混合波模型由电磁波传播测井幅度比和相位差计算介电常数的算法,并对实测资料进行了计算比较,结果表明经几何发散校正的平面波模型算法和混合波模型算法比较稳定且效果一致,可以同时用于计算200 MHz和47 MHz不同频率的介电常数。

Introduced are the permittivity algorithms from amplitude attenuation and phase difference in electromagnetic propagation log. Three algorithms such as the plane wave model, spherical wave model and the mixed wave model are presented. The comparisons between the three algorithms are also given. The data processing result indicates that the algorithms of the plane wave model with geometrical attenuation correction and the mixed wave model are stable, almost the same, and suitable for calculating the permittivities at 200 MHz and 47 MHz respectively.