Gas-liquid two-phase flow distribution parameter measurement method for double fiber array sensor

A technology of gas-liquid two-phase flow and dual optical fiber array, which is applied in the direction of fluid velocity measurement, measurement device, velocity/acceleration/shock measurement, etc. Aiming at problems such as easy polarization, it achieves the effects of small size, average gas holdup rate and average gas phase flow rate measurement, and improved capture capacity

Inactive Publication Date: 2019-04-09
TIANJIN UNIV
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Problems solved by technology

[0003] In the measurement of local flow parameters of gas-liquid two-phase flow, the double-headed electric probe sensor has a relatively large probe size and is easy to polarize, resulting in low success rate and accuracy of electric probe measurement

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  • Gas-liquid two-phase flow distribution parameter measurement method for double fiber array sensor
  • Gas-liquid two-phase flow distribution parameter measurement method for double fiber array sensor
  • Gas-liquid two-phase flow distribution parameter measurement method for double fiber array sensor

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] In order to realize the distribution of the gas phase concentration and velocity in the gas-liquid two-phase flow in the cross-section of the pipeline, the invention uses a dual fiber optic array sensor for measurement, breaking through the limitation of single fiber probe sensor in single direction measurement. In terms of measurement application, this method aims to place eight double-headed optical fiber array sensors in the 20mm small-diameter measurement channel of the flow-collecting fluid production profile logging tool, especially, to place eight double-headed optical fiber array sensors in the measurement channel3 In a ring position, the first ring only contains 1 double-headed fiber optic probe, the second ring consists of 3 double-headed fiber optic probe array sensors, and the third ring consists of a total of 4 double-headed fiber o...

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Abstract

The invention relates to a double fiber array sensor for measuring gas phase distribution parameters of gas-liquid two-phase flow, comprising eight identical dual-fiber probe sensors distributed at three annular locations within the measurement channel. The first ring comprises a 1-way dual-fiber probe sensor and is located in the center of the pipe. The second ring comprises a 3-way dual-fiber probe sensor with an equilateral triangle evenly distributed over a small circumference. The third ring comprises a 4-way dual fiber probe sensor uniformly distributed in a square shape. The radius of the small circle where the second ring sensor is located is equal to half of the radius of the circle in the third ring sensor and one-third of the radius of the measuring pipe. Each of the dual-fiberprobe sensors comprises a metal sleeve and a long and a short and a long identical fiber probes extending from the metal sleeve. The long probe is an upstream fiber probe and the short probe is a downstream fiber probe. The gas-liquid two-phase flow gas distribution parameter measurement method for double fiber array sensor simultaneously provides a gas-liquid two-phase flow distribution parametermeasurement method realized by the array sensor.

Description

technical field [0001] The invention relates to a method for measuring flow parameters of oil well gas-liquid two-phase flow gas phase characteristics in the field of oil field dynamic monitoring. Background technique [0002] Gas-liquid two-phase flow exists widely in fields such as petroleum exploitation, nuclear reactor, and thermal power engineering. Due to the complex interaction and relative motion between the phases of the gas-liquid two-phase flow, its flow behavior presents the characteristics of high irregularity, randomness, and instability of the flow structure. In particular, the local concentration and local flow velocity of slug flow and mixed flow are characterized by non-uniform distribution, and it is very difficult to accurately measure the flow parameters of gas-liquid two-phase flow. Therefore, it is of great significance to study the measurement method of local flow characteristics of gas-liquid two-phase flow for the optimal design of gas-liquid two-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01P5/26
CPCG01N21/1702G01P5/26
Inventor 金宁德杨秋怡翟路生任英玉
Owner TIANJIN UNIV
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