Testing of a Dielectric-Filled Ridged Waveguide System for Oil/Water Ratio Measurements

A prototype of a previously presented design of a microwave oil/water ratio measurement system for geological applications was built and tested in a commercial flow loop. The prototype used a vector network analyzer to measure the reflection (S11) and transmission (S21) coefficients of the fluids un...

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Bibliographic Details
Main Author: Alvarez, jose Oliverio
Format: Conference Proceeding
Language:English
Subjects:
Fluid flow measurement
Methane
Microwave measurement
Oils
Prototypes
Sensitivity
Volume measurement
Online Access:Request full text
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Summary:A prototype of a previously presented design of a microwave oil/water ratio measurement system for geological applications was built and tested in a commercial flow loop. The prototype used a vector network analyzer to measure the reflection (S11) and transmission (S21) coefficients of the fluids under test. The fluids tested had different compositions of dearomatized oil, low salinity water and methane. This paper presents results from the flow loop evaluation of the present oil-brine-ratio (OBR) meter prototype. Transmission and reflection spectrums were obtained for different oil, water, and methane combinations. Transmission data shows good sensitivity and accuracy for most water volume fractions (WVF) below 70%. Transmission in WVF above 70% could be inverted by using a different frequency band and results could also be combined with S11 data to improve accuracy. In addition, the effect of gas volume fraction (GVF) above 50% is seen as a significant increase in transmission, for high WVF, relative to the de-gassed case. In the case of WVF less than 45%, the effect of gas can be measured by a shift in the cut-off frequency. Thus, the measuring system could also be used for gas kick detection.
ISSN:2474-2740
DOI:10.23919/AMTA58553.2023.10293317