中文摘要：

提出了一种预测XCTD剖面仪的螺线电感固有电容的计算方法，采用最优解析法建立双股螺旋电感线圈的分布电容模型。首先推导出各基本结构单元分布电容的计算公式，计算出实际电感线圈基本结构单元的分布电容．最终对各个参数进行了分析与讨论，得出各参数对分布电容的大小的影响。分析结果可以用来指导电感线圈的设计．减小分布电容已达到提高电感线圈的传输性能。

英文摘要：

A new method for predicting the self capacitance of spiral inductors for XCTD （Expendable Conductivity, Temperature and Depth） profiler was presented based on an analytical approach and the physical structure of spiral inductors. The best analytical method of the basic structural units of spiral inductor coil was selected to establish a mathematical model. Then the theoretical formula of the distributed capacitance of the basic structural unit was derived. The size of the basic capacitance was calculated using the MATLAB tool based on the actual parameters of the inductor coil. Finally, the various parameters of the distributed capacitance of the theoretical formula were analyzed to obtain the influence of various parameters on the distributed capacitance, which can guide the design of the inductor coil in turn and reduce the impact of the distributed capacitance on the performance of the inductor coil.