摘要
随钻感应电阻率测井仪器结构复杂,测量信号的大小受磁芯、反射层、钻铤的影响,并且是非对称结构,用常规的居中感应电阻率测井理论不能满足仪器研究和设计的要求。介绍了随钻感应电阻率测井仪器的结构及特点,通过基于有限元算法的Maxwell数值模拟软件,计算和分析了磁芯和反射层以及钻铤对测量信号的影响,确定了仪器K值,并进行了仪器实际测量值与数值模拟计算值的对比。为仪器的数据处理和更进一步的发展提供了理论依据。
As a result of complex [.WD induction resistivity tool structure, measuring signal is effected by magnetic core, reflective layer and drill collar; and due to the tool＇s asymmetric structure, the conventional middle induction resistivity logging theory can not meet the requirements of the tool research and design. The structure and performance of LWD induction resistivity tool are introduced. With the help of numerical simulation software ＂Maxwell＂ based on the finite element method, the effects of magnetic core, reflective layer and drill collar on the measurement signal are calculated and analyzed, and the K value of tool is determined too. The actual measured value and the numerical value are compared. The research provides a theoretical basis for the tool data processing and future development.
出处
《测井技术》
CAS
CSCD
北大核心
2013年第3期239-243,共5页
Well Logging Technology
关键词
随钻感应电阻率测井
磁芯
反射层
钻铤
K值
LWD induction resistivity logging
magnetic core
reflective layer
drill collar
Kvalue
