论文标题
超声波和电磁传感器，用于井下储层表征
Ultrasonic and Electromagnetic Sensors for Downhole Reservoir Characterization
论文作者
论文摘要
当前的工作涵盖了应用于增强地热系统（EGS）的温度测量和流动表征的超声和电磁（EM）技术的评估。我们已经评估了用于温度梯度和轮廓测量值的超声技术和微波辐射测定法。开发了基于波导的超声探针来测量温度梯度。引入了通过散布超声信号的光谱分析估算平均晶粒尺寸的统计方法。为了定向温度测量，比较了不同的微波天线设计，并选择了阵列环天线设计以进一步开发。最后，提出了表征热岩石资源的孔隙率和渗透性的技术。
The current work covers the evaluation of ultrasonic and electromagnetic (EM) techniques applied to temperature measurement and flow characterization for Enhanced Geothermal System (EGS). We have evaluated both ultrasonic techniques and microwave radiometry for temperature gradient and profile measurements. A waveguide-based ultrasonic probe was developed to measure the temperature gradient. A statistic approach on estimating the average grain size via spectral analysis of the scattered ultrasonic signals is introduced. For directional temperature measurement, different microwave antenna designs are compared numerically and an array loop antenna design is selected for further development. Finally techniques to characterize the porosity and permeability of a hot dry rock resource are presented.
