Title: Experimental Investigation of Oil-Gas Two-Phase Flow Using Venturi and Void Fraction Sensor
Abstract:In petroleum industry, how to measure the flowrate of oil-gas two-phase flow accurately is important for the evaluation of the well production and the management of the oilfield. Because of the compli...In petroleum industry, how to measure the flowrate of oil-gas two-phase flow accurately is important for the evaluation of the well production and the management of the oilfield. Because of the complicatedness of the slip between the gas phase and the liquid phase and the lack of high-accuracy two-phase measuring appliance, it is difficult to obtain the accurate two-phase flowrate. Theoretical and experimental investigations of the two-phase flowrate measurement were carried out in an oil-gas two-phase experimental loop with a Venturi meter and a void fraction sensor. The inner diameter of the test pipeline is 75 mm and its straight length before the test section is 30 m. An advanced radiated sensor was used to measure the void fraction on the pipe section; thereby the density of the oil-gas mixture can be got. A conventional Venturi meter with the ratio of throat diameter to full diameter of 0.45 was used to measure the total mass flowrate of oil-gas two-phase flow. Using the obtained total mass flowrate, oil-gas mixture density and void fraction, the liquid flowrate of the oil-gas two-phase flow can be calculated. Moreover, considering the effect of the slip between the oil and gas phase on the calculation of the gas flowrate, the traditional homogeneous flow model was improved, and a new calculation method for the gas flowrate in the gas-liquid two-phase flow was developed. Experimental results show that the liquid flowrate and gas flowrate of the oil-gas two-phase flow obtained by the proposed method have higher accuracy than those obtained by using the conventional methods based on the traditional homogeneous flow model.Read More
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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