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The Survey of Basket Electromagnetic Flowmeter Applied in High Water-Cut Oil-Water Two-Phase Flow

Author: WangLe
Tutor: LiuXingBin
School: Northeast University of Petroleum
Course: Precision instruments and machinery
Keywords: Set flow electromagnetic flowmeter Oil-water two-phase flow Flow Ansys Simulation
CLC: TH814.93
Type: Master's thesis
Year: 2011
Downloads: 67
Quote: 0
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Abstract


Production Profile Logging task is complete parameter measurements of downhole flow rate of each layer, fluid composition, pressure, temperature and density, which flow measurement is one of the important parameter measurement. Compared with other flowmeter, electromagnetic flowmeter has a simple structure, no moving parts and choke components from fluid physical parameters, measuring range, high accuracy, good corrosion resistance, low flow rate distribution requirements to use and reliable, and has been successfully applied in major oil wells. Electromagnetic method measuring flow has been widely used in ground single-phase flow measurement of conductive fluid (such as water), also widely used in the oil field water injection wells, polymer injection wells, injection profile logging. But in oilfield production profile logging for measuring the flow of oil-water two-phase flow has not been someone to try. This subject as a Production Logging Production Profile Logging Technology oilfield development has important theoretical significance. This research set flow electromagnetic flowmeter feasibility of the total flow of the high water content of oil-water two-phase flow, and simulation and experiments. Ansys finite element simulation software research carried out on the the underground collector electromagnetic flowmeters runner magnetic field simulation, optimization based on two methods research field structure: first, to construct a uniform magnetic field for the purpose to optimize the excitation structure The program Matlab mathematical calculation software Ansys simulation data analysis and processing, and then analyzes the internal magnetic field of the electromagnetic flow meter flow channel defined in the evaluation of the four magnetic field at the same time, a comprehensive trade-offs of various indicators, resulting in Jiaoyou excitation structure parameters makes the magnetic field homogeneity; Second, based on the theory of excitation structure of the weighting function to optimize the distribution of the product by the the flowmeter flow channel within magnetic flux density and weight function, the program on the basis of the simulation study defined two indicators to evaluate the merits of the distribution, thus theoretically optimal excitation structure parameters, so that the average velocity of the fluid induced electromotive force is proportional to. And then compare the two optimization schemes and preferred. The electromagnetic flowmeter collector dynamic experimental study on large multiphase flow experimental apparatus. Experimental results show that: (1) under the conditions of high water content, instruments to measure stable and reliable, suitable for the measurement of the total flow of the oil-water two-phase flow, and calibration results are independent of the moisture content, but with the moisture content increases in response to the increase of frequency fluctuations; ( 2) reduce the flow channel approach to reduce the lower limit of the measurement, measuring the effect has been significantly improved, and the error is less than ± 5%, to achieve the requirements of the technical indicators.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Thermal measuring instruments > Flow Meter > Electromagnetic flowmeter
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