| Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system |
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| 作者姓名： | 李东晖 吴应湘 李志彪 钟兴福 |
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| 作者单位： | Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China，Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China，Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China，Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China |
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| 摘 要： | INTRODUCTION Oil-water-gas multiphase mixed transport in oil pipe is extensively used in ocean oil industries. How to measure the volumetric fractions of oil-water-gas multiphase flow is an important subject of study in the oil industry. Related research work was started in the 1980s. The measurement of component ratios in multiphase flows using γ-ray attenuation was first suggested by Abouelwafa and Kendall (1980), and the technique has been used in many current com- mercial multiphase…
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| 关 键 词： | Dual-energy γ-ray |
| 收稿时间： | 2005-09-07 |
| 修稿时间： | 2005-09-25 |
Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system |
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| Li Dong-hui,Wu Ying-xiang,Li Zhi-biao,Zhong Xing-fu.Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system[J].Journal of Zhejiang University Science,2005,6(12):1405-1411. |
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| Authors: | Li Dong-hui Wu Ying-xiang Li Zhi-biao Zhong Xing-fu |
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| Institution: | (1) Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China |
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| Abstract: | Volumetric fraction distribution measurement is a constituent part of process tomography system in oil-water-gas mulfiphase flow. With the technological development of nuclear radial inspection, dual-energy γ-ray techniques make it possible to investigate the concentration of the different components on the cross-section of oil-water-gas multiphase pipe-flow. The dual-energy gamma-ray technique is based on materials attenuation coefficients measurement comprised of two radioactive isotopes of 241Am and 241Cs which have emission energies at 59.5 keV and 662 keV in this project. Nuclear instruments and data acquisition system were designed to measure the material's attenuation dose rate and a number of static tests were conducted at the Multiphase Laboratory, Institute of Mechanics, Chinese Academy of Sciences. Three phases of oil-water-gas media were investigated for their possible use to simulate different media volumetric fraction distributions in experimental vessels. Attenuation intensities were measured, and the arithmetic of linear attenuation coefficients and the equations of volumetric fractions were studied. Investigation of an unexpected measurement error from attenuation equations revealed that a modified arithmetic was involved and finally the system achieved acceptable accuracy in experimental research. |
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| Keywords: | Volumetric fraction Multiphase flow Process tomography |
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