摘要
本文由麦克斯韦组导出低频电极型的位场所满足的偏微分方程及此时的低频电极型源的激励形式。用数值模式匹配法求低频电极型源激励的格林函数数值解，并把此方法得到的结果同其它方法（如积分方程法、混合法和直流电流法）的结果进行比较。由此可得出低频情况下电极型电阻率测井仪随频率的响应，这为实际电极型电阻率测井仪在１ｋＨｚ的工作频率以内测量电阻率提供依据。
In this Paper,we derive the partial differential equation for the Potential field of low--frequency dlectrode-type by the Maxwell's equations and give the excited expression of source for low-frequency electrode-typethin current ring.We compute the numerical solution of Green'.function for the excited source of low--frequencyelectrode--type using the numerical mode-matching method(NMM)and compare the NMM results with othermethods,for example,integral equation method.hybrid method and dc method.Therefore,we obtain the effect offrequency on electrode--type resistivity logging tool,which provide has for m￣ring resiativity in the condition ofoperating frequency ho than 1 kHz.
出处
《电波科学学报》
EI
CSCD
1996年第4期54-61,共8页
Chinese Journal of Radio Science
