岩石电阻率测量中导线引起的误差分析及校正方法

The Error Analysis and Its Correction Caused by Cable in The Resistivity Measurements of Rock.

目前实验室测量岩石复电阻率一般都采用集总电路模型 ,没有考虑测量电缆的影响。这在测量频率较高时将会产生较大的系统误差。利用均匀传输线理论 ,将测量电缆用均匀传输线模型等效来校正测量结果。从理论上推导出了岩心复阻抗与测量阻抗之间的关系。通过对标准电阻和实际岩心的测量 。

The Resistivity measurements of rock in lab are generally based on the lumped circuit model, so the effect of cable is usually neglected. But in the high frequency measurements, the effect of cable will lead to serious errors. According to the transmission line theory, a correction method which uses a homogeneous transmission line to simulate the cable is put forward. The relationship between the rock impedance and the measured impedance is derived. The validity and feasibilty of the correction method is proved by some measurements of standard resistance and actual rock samples.