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Oil-gas-water three-phase flow velocity measurement method and measurement device

A velocity measurement, three-phase flow technology, applied in fluid velocity measurement, measurement device, velocity/acceleration/impact measurement, etc., can solve the problem of large velocity measurement error of oil, gas, and water three-phase flow, so as to alleviate measurement errors and save measurement costs Effect

Inactive Publication Date: 2012-07-04
YANSHAN UNIV
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Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a method and device for measuring the velocity of oil-gas-water three-phase flow, so as to overcome the defect of large error in oil-gas-water three-phase flow velocity measurement in the prior art

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  • Oil-gas-water three-phase flow velocity measurement method and measurement device
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  • Oil-gas-water three-phase flow velocity measurement method and measurement device

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Embodiment Construction

[0058] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0059] For the three-phase flow of oil, gas and water, if the wave signal generated by bubbles and oil bubbles can be separated from the mixed signal of the three-phase flow, the measurement of the three-phase flow can be decomposed into two-phase gas-water flow and two-phase oil-water flow. Flow measurement, which will provide a new technical means for three-phase flow measurement. Separating the original signal from the mixed signal can be regarded as a blind source separation problem. Independent component analysis is a new statistical signal processing technology developed with the blind source separation problem. The basic idea is to separate the multi-channel observation signals according to statistics. In principle, several independent components are decomposed through optimization algorithms, and these independent components are...

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Abstract

The invention discloses an oil-gas-water three-phase flow velocity measurement method which comprises the following steps of: carrying out blind source separation on acquired flowing signals of three phase flows by adopting an independent component analysis method to obtain signals representing gas-phase flowing and liquid-phase flowing; and after blind source separation, carrying out time-delay estimation on the obtained upstream and downstream gas-phase and liquid-phase signals so as to obtain the gas-phase flow velocity and the liquid-phase flow velocity of three oil, gas and water phases. The invention also discloses an oil-gas-water three-phase flow velocity measurement device. When the oil-gas-water three-phase flow velocity measurement method and the oil-gas-water three-phase flow velocity measurement device are adopted to carry out oil-gas-water three-phase flow velocity measurement, the gas-phase flow velocity and the liquid-phase flow velocity can be respectively calculated and the problem that in related velocity measurement methods, peaks are inaccurate to search to influence the transit time precision so as to cause errors of measuring the speed and the flow velocity is relieved, and thus, a more objective and actual measurement result is obtained.

Description

Technical field [0001] The invention relates to the technical field of measuring the three-phase flow of oil, gas and water, in particular to a method and a measuring device for measuring the velocity of the three-phase flow of oil, gas and water. Background technique [0002] Oil, gas and water three-phase mixtures are widely present in petroleum, chemical industry and other related industries. Especially in petroleum exploration, natural gas and formation water are often produced at the same time as crude oil. It is rarely a single liquid crude oil, but mostly oil-gas-water three-phase mixtures. The dynamic characteristics of each phase of the oil, gas and water three-phase flow are extremely complex, so the measurement is much more complicated than the single-phase flow measurement. The measurement of three-phase flow has not been satisfactorily resolved in the world so far. Due to the wide range of the three-phase flow system and the importance of its application in the proce...

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Application Information

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IPC IPC(8): G01P5/08
Inventor 李英伟刘兴斌孔令富谢娜于莉娜黄春辉
Owner YANSHAN UNIV
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