几种线圈系探测特性的分析

Analysis of Detecting Features of Several Coil Sondes

感应测井仪是反映井周围附近地层电阻率特性的一种横向测井设备，而其线圈系是反映该仪器性能的一个重要部分。文章通过定量计算，对国外几种新型感应测井仪的线圈系的探测特性进行了分析对比。结果表明，阵列感应成象仪不但具有很好的纵向和径向特性，而且可提供丰富的径向信息，能够定量描述复杂侵入。但是，其最大探测深度不够深，短阵列响应受井眼影响大，有待进一步改进。

Induction logging tool is a kind of radial logging apparatus that investigate the formation near borehole. Its coil sondes is a keypart to fulfill the tool property. Based on a quantitative calculation, this paper analyzed and compared the detection abilities of coil sondesof foriegn induction tools. The outcome shows that not only Array InductionImager tool has a good performance in both verticle and radialdirection, but provides a plenty of radial information that can beutilized in quantitative explaination of complicated invasion. But afurther work should be done for its insuficient maxium detecting depthand the problem that the response of short Array is affected tremendouslyby the borehole.