METHOD FOR DETERMINING THE FLOW OF FRACTIONAL SHARE OF WATER IN A MULTIPHASE IMMISCIBLE MEDIUM Russian patent published in 2022 - IPC G01F1/74 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology and can be used in information-measuring systems of the oil producing and oil refining industries for measuring water flow based on data on its content as one of the components of a multiphase medium, in particular, to determine the flow rate of a well, as well as in other industries where there is a need to measure the flow of multi-phase process media. The substance of the invention lies in the fact that a measuring section is built into the pipeline, made in the form of a section of a pipe with walls made of a dielectric material, outside of which at least the first and second control sections are created, in each of which at least one sensor is installed, made in the form capacitive or magnetic emitter and receiver. The fractional proportion of water is determined at least in the first control cross section by creating a scanning electromagnetic high-frequency signal at a given frequency supplied to the emitter using a generator; characteristics. Then, the obtained amplitude characteristic is processed and analyzed, and based on the analysis of the obtained characteristic, the fractional proportion of water in one control section of the pipe is determined, after which, based on the information obtained about the fractional proportion of water in the first control section, the water flow in the measuring section of the pipeline is determined using an additional amplitude characteristic obtained using the signal recorded by the sensor receiver in the second control section. According to the invention, before setting the scanning signals in determining the fractional proportion of water, a series of preliminary measurements is carried out in the form of a calibration scan of the cross section of the control section of the pipe before it is embedded in the pipeline, changing the water content in the control section of the pipe and the carrier frequency of the generator signal. At least the frequency of the calibration scanning signal is selected, at which the amplitude of the recorded signal is proportional to the amount of water, and at least one of the control characteristics of the dependence of the signal amplitude on the amount of water in the control section, obtained as a result of preliminary measurements, is entered into the data bank. Scanning of the measuring section of the pipe after its embedding in the pipeline is carried out at a frequency selected during preliminary measurements. The analysis of the amplitude characteristic obtained during scanning is carried out by comparing it with the control amplitude characteristic. The speed of water movement in the measuring section is determined by determining the delay time of the corresponding amplitude of the recorded signal of the receiver of the second sensor relative to the amplitude of the signal of the receiver of the first sensor, taking into account the distance between the control sections, and the water flow is determined based on the obtained data on the fractional proportion of water in the control section and the speed of water movement in the measuring section.

EFFECT: improving the accuracy of determining the fractional flow rate of water in a multiphase medium.

4 cl, 1 dwg