仵杰;胡静;云腾;

• 1:西安石油大学电子工程学院
• 2:陕西省油气井测控技术重点实验室

摘要(Abstract)：

传统电法测井仪器探测深度仅数米，无法满足井周数十米水平井地层边界识别的需求。传统的电磁远探测方法都是基于磁场进行计算的，本文利用半线圈所具有的远探测能力，同时测量电场强度和磁场强度，计算了仪器旋转角度、工作频率、线圈系源距、仪器距边界距离等因素对半线圈响应特性的影响。研究表明：半线圈对旋转角度反应敏感；半线圈接收的信号强度随源距的增大而单调减小，源距越小，接收信号强度越强，趋肤效应影响越小；半线圈信号强度随频率的增大呈先增大后减小的趋势；频率较小时，信号强度受源距的影响较小，频率较大时，信号强度受源距的影响较大，且信号衰减严重；半线圈探边能力优于全线圈，且半线圈衰减缓慢，半线圈工作频率为1 kHz时，源距对信号强度几乎没有影响，半线圈的探边距离均可达到30 m。通过计算分析半线圈在不同情况下的探测特性，设计最远探测深度可达30 m的仪器工作频率、源距，进一步分析仪器响应特性，为实际仪器设计和应用分析提供理论依据。

关键词(KeyWords)： COMSOL软件;半线圈;远探测;电法测井

Abstract:

Keywords:

基金项目(Foundation): 国家“十三五”重大专项课题“测井交互精细融合处理平台”(2017ZX05019001);; 西安石油大学研究生创新与实践能力培养项目(YCS19113051)

作者(Authors): 仵杰;胡静;云腾;

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