全对称结构线圈系响应特性分析

常规双感应测井仪传感器存在不能兼顾径向探测深度和纵向分辨率且结构复杂的缺点。文章介绍了一种全对称结构线圈系，对称分布的发射和接收线圈参数相同，保证了线圈系的纵向响应完全对称。计算出了其深／中感应线圈系的纵向、横向几何因子曲线和空间频域响应曲线，并以此为基础对其响应特性进行了讨论。结果表明，该线圈系结构简单，技术指标优良，可以兼有较大的径向探测深度和较高的纵向分辨率。

Analysis on the response characteristics of the full-symmetrical configuration coil array

Traditional coil array is complex in configulation,and can not match radial depth of investigation and vertical resolution. The paper introduces a full symmetrical configulation coil array,which has the same parameter of symmetrical distribution transmitter receiver coil,and this ensures vertical response symmetry of coil array. The paper calculates vertical and radial geometric factors,and gives and analyzes the curves of vertical and radial geometric factors of deep middle induction coils. Results show the full symmetrical configuration coil arry is simple in configuration and fine in technique characteristics,and can match radial depth of investigation and vertical resolution.