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本文研究了一种全新的多频幅相测井仪的线圈系设计。文中首先通过研究三线圈系的响应函数,分析测井响应与发射频率和源距的关系,得出探测深度随频率的增加、源距的减小而变浅;分辨力随频率的减小、源距的增大而迅速变差的结论。在此基础上,设计了多频幅相测井仪的线圈系模型,并在典型地层中模拟了幅相测井仪的探测特性。实验结果表明仪器探测深度达到了3m,分层能力达到了30cm,满足仪器性能指标的设计要求。本文的研究工作为后续测井仪器的设计提供了理论依据。
This paper studies the design of a new coil system of multi-frequency phase logging tool. Firstly, the relationship between logging response and emission frequency and source distance was analyzed by studying the response function of the three-coil system. The result shows that the depth of detection increases with the increase of the frequency and decreases with the decrease of source distance. With the decrease of the resolution, Source of the increase in the rapid deterioration of the conclusion. On this basis, the coil model of multi-frequency phase logging tools is designed and the detection characteristics of amplitude-phase logging tools are simulated in typical formations. The experimental results show that the detection depth of the instrument reaches 3m and the stratification ability reaches 30cm, which meets the design requirements of instrument performance index. The research work in this paper provides a theoretical basis for the design of subsequent logging tools.