Study on reducing the effect of salinity in the phase fraction measurement of oil/water two-phase flow

It is important to measure the water cut of crude oil from oil wells accurately for efficient oil exploitation and production. However, overcoming the effect of salinity in high water cut measurement of oil/water two-phase flow is very difficult. In order to reduce the effect of salinity, a method based on imaginary and real part demodulation is presented in this paper. The impedance of oil/water two-phase flow is decomposed into real and imaginary parts, and then measured independently. Some experimental work was undertaken on measuring salt water with different salinity. The experimental results showed that the salinity has little influence on the imaginary part of the measured impedance