title: Novel Downhole Electromagnetic Flowmeter for Oil-Water Two-Phase Flow in High-Water-Cut Oil-Producing Wells.
abstract: 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 m³/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 m³/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.
authors.affiliation: Harbin Institute of Technology, School of Electrical Engineering and Automation, Harbin 150001, China. dlts_wangyj@petrochina.com.cn.|Daqing Oilfield Limited Company, Daqing 163412, China. dlts_wangyj@petrochina.com.cn.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Harbin Institute of Technology, School of Electrical Engineering and Automation, Harbin 150001, China. lihy@hit.edu.cn.
authors.forename: Haoyu
authors.initials: H
authors.lastname: Li
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. dlts_liuxb@petrochina.com.cn.
authors.forename: Xingbin
authors.initials: X
authors.lastname: Liu
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. dlts_zhangyhui@petrochina.com.cn.
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. xieronghua@petrochina.com.cn.
authors.forename: Ronghua
authors.initials: R
authors.lastname: Xie
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. dlts_huangch@petrochina.com.cn.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Huang
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. dlts_hujh@petrochina.com.cn.
authors.forename: Jinhai
authors.initials: J
authors.lastname: Hu
authors.affiliation: Daqing Oilfield Limited Company, Daqing 163412, China. denggang@petrochina.com.cn.
authors.forename: Gang
authors.initials: G
authors.lastname: Deng
keywords: electromagnetic flowmeter; flowrate measurement; magnetic field; oil-producing well; oil-water two-phase flow; onsite experiments; weight function