基于微波传输特性的原油含水率测量方法研究

发布时间：2018-06-29 02:06

本文选题：传输特性 + 含水率测量　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：原油含水率的在线实时检测能迅速准确地反映油井的工作状态,准确测量原油含水率对油井的自动化管理至关重要。本文在参考国内外相关文献基础上,概括了原油含水率检测方法的研究现状。基于电磁波在水和油中的传输差异性,本文提出一种测量原油含水率的方法,实现了原油含水率的测量。论文主要工作如下:1.针对原油含水率的在线测量,结合油水混合物的物理特性,概述了电磁波传播理论及天线原理。基于实际介质特性测量模型,分析了天线S_(11)参数对介质特性测量的影响,并获得了衰减系数测量的绝对误差与天线S_(11)之间的关系。理论分析结果表明:当S_(11)小于-10dB时,衰减系数测量的绝对误差小于1dB;S_(11)越小,S_(11)参数对介质衰减特性测量的影响越小。2.基于理论分析结果,设计了一种超宽带天线,在天线工作于测试频率时,使天线在不同含水率的介质情况下,测量天线仍满足S_(11)小于-10dB,保证了测量绝对误差小于1dB。3.建立了原油含水率测量模型,利用Ansoft HFSS软件对此进行仿真,仿真结果表明:当工作频率为3.8GHz时,原油含水率在0%-100%范围时,天线的S_(11)参数小于-10dB。并获得了传输系数S_(21)与原油含水率的关系。4.搭建了实验模型,进行了系统实验测试,测量了电磁波在不同含水率油中传输特性,并对实验与仿真结果进行对比分析。结果表明:仿真结果与实验结果相吻合,设计的宽带天线可应用于含水率测量。该研究为原油含水率测量系统实现高精度和在线测量提供了理论与实验参考。
[Abstract]:On-line real-time detection of crude oil water cut can quickly and accurately reflect the working state of oil wells. Accurate measurement of crude oil water cut is very important to the automatic management of oil wells. In this paper, based on the reference of domestic and foreign literatures, the research status of water cut detection method of crude oil is summarized. Based on the difference of electromagnetic wave transmission between water and oil, a method of measuring water cut of crude oil is presented in this paper, and the measurement of water content of crude oil is realized. The main work of this paper is as follows: 1. In this paper, the theory of electromagnetic wave propagation and the principle of antenna are summarized according to the on-line measurement of crude oil moisture content and the physical characteristics of oil-water mixture. Based on the measurement model of actual dielectric characteristics, the influence of antenna S11 parameters on the measurement of dielectric characteristics is analyzed, and the relationship between the absolute error of attenuation coefficient measurement and antenna S11 is obtained. The theoretical analysis results show that when S11 is less than -10dB, the absolute error of attenuation coefficient is less than 1dBS11. The smaller the S11 parameter, the smaller the influence of S11 parameters on the measurement of dielectric attenuation characteristics. Based on the results of theoretical analysis, an ultra-wideband antenna is designed. When the antenna is working at the test frequency, the measurement antenna still meets the requirement of S11 < -10dBwhen the antenna has different moisture content, which ensures that the absolute error of measurement is less than 1dB.3. The model of measuring water content of crude oil is established and simulated by Ansoft software. The simulation results show that when the operating frequency is 3.8 GHz, the S11 parameter of antenna is less than -10 dB when the water content of crude oil is in the range of 0-100%. The relation between S _ (21) and water cut of crude oil was obtained. The experimental model was built, the system test was carried out, the transmission characteristics of electromagnetic wave in different water cut oil were measured, and the results of experiment and simulation were compared and analyzed. The results show that the simulation results are in good agreement with the experimental results, and the designed wideband antenna can be used to measure moisture content. The research provides theoretical and experimental reference for high precision and on-line measurement of crude oil moisture content measurement system.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE622

【参考文献】