A flow rate measurement method for horizontal oil-gas-water three-phase flows based on Venturi meter, blind tee, and gamma-ray attenuation

被引：26

作者：

Ma, Yugao ^{[1
]}

Li, Chao ^{[1
]}

Pan, Yanzhi ^{[2
]}

Hao, Yisheng ^{[1
]}

Huang, Shanfang ^{[1
]}

Cui, Yinghuan ^{[1
]}

Han, Wenbin ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

[2] Haimo Technol Grp Corp, Lanzhou 730050, Peoples R China

来源：

FLOW MEASUREMENT AND INSTRUMENTATION | 2021年 / 80卷

关键词：

Three-phase flow; Flow rate model; Slip ratio; Blind tee; Dual-energy gamma densitometer; VOID FRACTION; PROBE;

D O I：

10.1016/j.flowmeasinst.2021.101965

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Online horizontal oil-gas-water three-phase flow rate monitoring is essential for reliable operations during industrial production. A flow rate measurement method is developed in horizontal oil-gas-water three-phase flows by combining a blind tee, a Venturi meter, and a gamma-ray densitometer. The blind tee is installed at the test section entrance to homogenize the mixture by transforming the horizontal flow to a vertical upward flow. The Venturi meter is used for the total flow rate measurement. The dual-energy gamma-ray densitometer is used for phase holdup measurement. In the present method, blind-tee mixing effects and oil-water mixture slip behavior is essential, which were experimentally analyzed in this work. The phase inversion was found in the oil-water mixture with the increasing of the oil volume fraction. Besides, the addition of the gas reduces the oil-water slip ratio. For the range of 0-35% and 65-100% oil fraction in the oil-water liquid, the oil-water mixture can be well treated as a pseudo homogenous liquid with a slip ratio of 0.9-1.1. A three-phase flow rate model is then established for these conditions. The method was validated by horizontal oil-gas-water three-phase flows with average relative errors of 3.2% for the total flow rates, 4.3% for the gas flow rates, 11.5% for the oil flow rates, and 7.8% for the water flow rates.

引用

页数：10

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