Measurement of water holdup in oil-in-water emulsions in wellbores using microwave resonance sensor  

井筒水包油乳状液微波谐振传感器持水率测量方法研究

作　　者：Jin-Ningde Liu-Dongyang Bai-Landi Ren-Yingyu 金宁德;刘东洋;白兰迪;任英玉(天津大学,电气自动化与信息工程学院,天津300072)

机构地区：[1]School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China

出　　处：《Applied Geophysics》2021年第2期185-197,273,共14页应用地球物理（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42074142 and 51527805)。

摘　　要：In this study,we propose a new method for water holdup measurement of oil-in-water emulsions with a microwave resonance sensor(MRS).The angle and length of the electrode plate are optimized by HFSS simulation software.Using a vector network analyzer(VNA),a static calibration experiment is conducted,and the resonant frequency distribution of oil-in-water emulsions is analyzed within an 80%–100%water holdup range.In addition,we observe and analyze the micron-sized oil bubble structure in the emulsifi ed state with an optical microscope.On this basis,a dynamic experiment of oil-in-water emulsions with high water cut and low velocity in a vertical upward pipe is conducted.S_(21) response curves of the MRS are obtained by the VNA under diff erent working conditions in real time.Finally,we analyze the relationship between the resonant frequency and water cut.Experimental results show that the MRS has an average resolution of 0.096%water cut for high water cut oil-in-water emulsions within the frequency range of 2.2–2.8 GHz.本文介绍了一种微波谐振传感器水包油乳状液持水率的测量方法。通过HFSS仿真软件对电极张角和电极长度进行了优化分析。借助矢量网络分析仪对实物传感器进行静态标定实验,分析了持水率在80%~100%范围内水包油乳状液的谐振频率分布。此外,通过光学显微镜观察分析了乳化状态下微米级油泡结构。在此基础上,开展了垂直上升高含水低流速水包油乳状液动态实验,实时测取了不同流动工况下的微波谐振传感器的幅值S21响应曲线,分析了谐振频率随含水率变化的实验关系。结果表明,在2.2 GHz~2.8 GHz频率范围内,谐振传感器对高含水水包油乳状液的含水率测量平均分辨率为0.096%。

关 键 词：oil-in-water emulsions water holdup measurement high water cut microwave resonance sensor 

分 类 号：TE34[石油与天然气工程—油气田开发工程] TP212[自动化与计算机技术—检测技术与自动化装置]