On-line measurement device and method thereof for positive displacement oil-gas-water three-phase flow split-phase flow
A measurement device and water three-phase technology, applied in the field of multiphase flow measurement, can solve the problems of reduced value, poor real-time performance, and high investment cost, and achieve the effects of stable measurement, guaranteed speed, and reduced complexity
Active Publication Date: 2018-09-07
TSINGHUA UNIV
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Problems solved by technology
Although the separation of multiphase fluid into single-phase fluid by separator can obtain high accuracy, but due to poor real-time performance and high investment cost, it is difficult to measure oil-gas-water three-phase flow at the wellhead of a single well promotion, greatly reducing its value in industrial production
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[0040] Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is further described as follows:
[0041] The flow measurement device proposed by the invention is mainly used to realize the on-line measurement of the phase-separated flow of the oil-gas-water three-phase flow. Such as figure 1 As shown, the measuring device is mainly composed of two standard containers with liquid level sensors, two single-phase gas flowmeters, six control valves and multiple pipelines. The first control valve V1-1, the third control valve V1-2 and the sixth control valve V2-3 jointly constitute the first valve group, and the second control valve V2-1, the fourth control valve V2-2 and the fifth control valve V1-3 jointly constitute the second valve group; wherein, The oil-gas-water three-phase inlet passes through the first pipeline a with the first control valve V1-1, the second pipeline b with the second control valve V2-1, and the thr...
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The invention relates to an on-line measurement device and method thereof for positive displacement oil-gas-water three-phase flow split-phase flow, and belongs to the technical field of multiphase flow measurement. The device is mainly composed of two standard containers with two liquid level sensors, two single-phase gas flowmeters, six control valves and a plurality of pipelines; due to using the standard containers with fixed volume, the method can accurately measure volume flow of liquid phase fluid in multiphase flow, and gas, density and moisture content are combined to calculate the split-phase flow of the oil-gas-water three-phase flow. According to the device, the two standard containers alternately collect and discharge liquid to achieve stable measurement of liquid phase fluidflow, the measuring speed is ensured, and on-line measurement is better achieved. According to the positive displacement principle, the measurement of the liquid phase fluid flow is converted to counting of liquid collecting and discharging frequencies of the standard containers, and complexity of mixed-phase measurement is reduced, the measuring accuracy is improved, and the measuring cost is greatly reduced.
Description
technical field [0001] The invention relates to an on-line measuring device and a related method for oil-gas-water three-phase flow split-phase flow, and belongs to the technical field of multiphase flow measurement. Background technique [0002] In the industrial field, measurement technology plays a very important role, such as petrochemical industry, environmental protection and so on. Multiphase flow exists widely in many scientific and engineering fields, and its application is ahead of theoretical research. The study of multiphase flow detection technology is due to the needs of practical applications, and secondly, it can provide an important auxiliary means for the theoretical research of multiphase flow. Compared with single-phase flow, multiphase flow has more complicated flow characteristics due to the existence of interface effects and relative velocities between different phases, and the phase interface changes randomly in time and space. For a long time, two-...
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IPC IPC(8): G01F1/00G01F11/28G01F15/08
CPCG01F1/00G01F11/28G01F15/08
Inventor 彭黎辉李轶李金库
Owner TSINGHUA UNIV