阵列感应测井仪器两种组合线圈的对比与应用  

Contrast and Application of Multiple Array Induction Logging Tool's Two Kinds of Combined Coils

作　　者：陈章龙 陈涛 刘枭[1,2] 李玉宁 樊琦 王丽 

机构地区：[1]中国石油集团测井技术有限公司,陕西西安710077 [2]西安石油大学,陕西西安710065

出　　处：《测井技术》2014年第5期605-610,共6页Well Logging Technology

基　　金：国家科技重大专项大型油气田及煤层气开发(2011ZX05020-001)

摘　　要：阵列感应测井仪器以三线圈系模式为基础,以同轴且平行线圈的互感系数理论为依据,推导出双线并绕组合线圈直耦电动势的理论公式,结合线圈参数计算出直耦电动势大小。通过对双线并绕的两种不同绕制方式的组合线圈进行分析、对比以及现场试验,证明了绕线间隔更大的组合线圈可以很好地降低直耦电动势,大大减小了电导率曲线随不同温度变化的影响,对提高仪器的稳定性和小信号处理能力具有重要意义。The multiple induction logging tool is based on the three coils mode and theory of the mutual inductance coefficient about the coaxial and parallel coil, from which deduced is the theory formula of the bifilar winding coil straight coupling EMF, and found is the straight coupling EMF by combining with the coils system＇s parameters. And then, according to the data analysis, comparison and field tests for the two combined coils of different kinds of winding models, it is proved that the combined coil of the bigger winding space reduces straight coupling EMF largely, greatly decreasing influence of the formation conductivity with the temperature changing, so it has great significance to improve the tool＇s stability and the small signal processing ability.

关 键 词：阵列感应测井仪器 互感系数 双线并绕 直耦电动势 电导率 

分 类 号：P631.83[天文地球—地质矿产勘探]