基于Comsol的井下瞬变电磁传感器建模与仿真

Modeling and simulation of downhole transient electromagnetic Sensor based on Comsol

井下传感器是测井工作中必不可少的组成部分,传感器的性能直接影响井下探测的准确性和测井解释的精确性。为了进一步提高井下传感器的灵敏度,本文以瞬变电磁理论为基础,以Comsol Multiphysics仿真软件为工具,建立了井下传感器探测的几何模型,通过添加物理场,网格剖分,求解了井下传感器的磁场分布,分析了探头尺寸、激励电流和线圈匝数等参数对井下传感器探测性能的影响。研究结果对井下传感器的优化设计具有一定的参考价值。

The downhole sensor is an indispensable part of the well-logging work and its performance directly affects the accuracy of the detection and the interpretation? In order to improve the sensitivity of the downhole sensor, based on the transient electromagnetic theory and Comsol Multiphysics software, this paper established the geometrical model of downhole detection by adding the physical field and meshing. Then, the distribution of the magnetic field was solved and the influence of the size of sensor, excitation current and the number of coil turns to the downhole sensor was analyzed. The result of this study has reference value for further optimization and design of the downhole sensor.