Abstract: The Coriolis mass flow meter is a multifunctional instrument with broad application prospects in liquid metering. This paper, starting from its working principle, establishes a relationship model between the direct and indirect measurement parameters of the Coriolis mass flow meter, analyzes the uncertainty of its indirect measurement, and proposes an automatic dynamic oil volume metering system for crude oil export using a Coriolis mass flow meter and a low-moisture analyzer. Calculations show that this automatic metering system has high measurement accuracy and can meet the accuracy requirements for crude oil export metering, providing a theoretical basis for the correct and reasonable selection of automatic metering methods for exported crude oil.
Keywords: automatic metering; density; mass flow rate; moisture content; metering accuracy
The Application of Coriolis Mass Flow Meterin automatic Measurement of Transporting Crude Oil Liu Zhicheng, Chen Xiangguang
Abstract : Coriolis mass flow meter is a multi-function measurement instrument; it will be widely applied in liquid measurement field. The working principle of Coriolis mass flow meter was analyzed, and the relationship model between direct measurement parameters and the indirect measurement parameters was built. The uncertainty of the indirect measurement parameters was analyzed; the automatic measuring system for dynamic quantity of crude oil that employs a Coriolis mass flow meter and an analysis instrument for low water content ratio was presented. and accurate measurement of transporting crude oil, providing the principle basis for reasonable and optimal selection of automatic measuring method for transporting crude oil.
Keywords : Automatic, Computation, Density, Quality Flux of Oil, Water Content Ratio, Measuring Precision
1 Introduction
The detection of crude oil parameters and automatic measurement of oil volume provide on-site data for oilfield trade settlement. The accuracy of measurement is directly related to the economic interests and reputation of oilfield production departments. This technical indicator has always been highly valued by relevant parties. The traditional measurement method is the online measurement method combining volumetric flow meter, density meter and crude oil water content analyzer [1]. Over the years, in order to ensure the accuracy and reliability of its measurement, a large number of scientific and technological workers have conducted a lot of experimental research on the selection of volumetric flow meter, focusing on turbine flow meter, vortex flow meter and rotary flow meter, etc., but the detection effect is still not ideal. The main problem is that the stability of the above-mentioned flow meters is poor, requiring the equipment of standard volumetric tube calibration device to calibrate the flow meter on site regularly [2]. Although the accuracy and reliability of measurement have improved, the investment and operating costs have also increased significantly. In recent years, with the development of information acquisition and processing technology, the accuracy, stability and reliability of Coriolis mass flow meter have also improved [3-5]. Coriolis mass flow meters can measure the mass flow rate, density, and temperature of crude oil (mixture) online, and thus calculate parameters such as the mass flow rate of pure oil, the mass flow rate of water, and the water content [6-7]. However, when this instrument is used alone for measuring imported crude oil, there is still a significant error. This paper analyzes the measurement principle of the Coriolis mass flow meter, establishes a quantitative relationship between direct and indirect measurement parameters and measurement uncertainty, and proposes a feasible solution to improve the accuracy of automatic measurement of imported crude oil.
For details, please click: Application of Coriolis mass flow meter in automatic metering of exported crude oil
