First, the measuring principle, the weight function, and the magnetic field of the novel downhole inserted electromagnetic flowmeter (EMF) are described. Second, the basic design of the EMF is described. Third, the dynamic experiments of two EMFs in oil-water two-phase flow are carried out. The experimental errors are analyzed in detail. The experimental results show that the maximum absolute value of the full-scale errors is better than 5%, the total flowrate is 5–60 m 3 /d, and the water-cut is higher than 60%. The maximum absolute value of the full-scale errors is better than 7%, the total flowrate is 2–60 m 3 /d, and the water-cut is higher than 70%. Finally, onsite experiments in high-water-cut oil-producing wells are conducted, and the possible reasons for the errors in the onsite experiments are analyzed. It is found that the EMF can provide an effective technology for measuring downhole oil-water two-phase flow.
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机译：首先，描述新型井下插入式电磁流量计（EMF）的测量原理，重量函数和磁场。其次，描述了EMF的基本设计。第三，在油水两相流中进行了两种电磁场的动力学实验。对实验误差进行了详细分析。实验结果表明，满量程误差的最大绝对值大于5％，总流量为5-60 m 3 / d，含水率大于60％。满量程误差的最大绝对值优于7％，总流量为2–60 m 3 / d，含水率高于70％。最后，在高含水率采油井中进行了现场实验，并分析了导致现场误差的可能原因。发现EMF可以为测量井下油水两相流提供有效的技术。
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