Abstract In this study, we propose a new method for water holdup measurement of oil-inwater 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. S21 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-inwater emulsions within the frequency range of 2.2–2.8 GHz.
About author: Ningde Jin received his Ph.D. degree from Zhejiang University in 1997. He has been a professor at the school of electrical and information engineering of Tianjin University since 2002. He serves as an Editorial Board Member of Flow Measurement and Instrumentation, Applied Geophysics. His research interests include the measurement techniques of multiphase flow and well logging technology in borehole geophysics. Email:ndjin@tju.edu.cn.
Cite this article:
. Measurement of water holdup in oil-in-water emulsions in wellbores using microwave resonance sensor[J]. APPLIED GEOPHYSICS, 2021, 18(2): 185-197.
2021, Vol. 18 
