On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity

A metering device, oil, gas and water technology, applied in the field of metering, can solve problems such as inability to realize online real-time measurement, harmful to human body, etc.

Inactive Publication Date: 2009-08-19
天津瑞吉德科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In order to overcome the problems that the above measurement methods are harmful to the human body and cannot realize online

Method used

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  • On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity
  • On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity
  • On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity

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Embodiment Construction

[0018] The structural principle and working principle of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 and figure 2 As shown, the present invention consists of a vertical pipe section 1 for measuring the average density of the oil-gas-water three-phase mixture, a Venturi tube 2 for measuring the total flow of the oil-gas-water three-phase fluid, and a liquid phase (oil-water mixture) water content online measurement system. The liquid phase moisture content measurement system is composed of a liquid sampling device 4, a liquid phase moisture content measurement tube 5 and a microwave type moisture content meter or a differential pressure type moisture content meter 7 installed thereon. The oil-gas-water three-phase fluid to be measured first flows vertically upward through the vertical pipe section connected to the inlet flange 12, and the pressure drop ΔP of the oil-gas-water three-phase fluid ...

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Abstract

The invention belongs to the metering technology category and the proposal is proposed to aim at overcoming the problems that the existing measuring facility is large and complicated in structure and difficult to realize online real-time measurement. A measuring facility of mixed fluid of oil, gas and water is composed of a vertical pipe section, a Venturi tube and a water content measuring device. The vertical pipe section is connected with a differential pressure transducer Delta P2, a pressure transducer P and a differential pressure transducer Delta P1. A cyclone and a sampling device are arranged at the position of the water content measuring device. A microwave or differential pressure type water content measuring meter is used. The cyclone throws the fluid toward the tube wall and can smoothly divert partial liquid through a sampling circular seam. Because the differential pressure function of a drainage tube can lead the liquid with the water content measured to smoothly return to a main tube, the stable liquid flow is formed, thus realizing real-time online measurement. The flow rate of each phase of the oil, gas and water can be obtained through further calculation of measured data according to a formula. The measuring facility and the measuring method are characterized by high precision, wide working range, low operating cost and stable performance and can reliably realize the real-time online measurement.

Description

Technical field: [0001] The invention belongs to the category of metering technology, and specifically relates to a metering method and device for the flow of each phase of a crude oil-natural gas-water three-phase mixture or a natural gas-condensate-water three-phase mixture. Background technique: [0002] In the production process of crude oil, crude oil is usually produced together with associated natural gas and formation water or water injection, forming oil-gas-water three-phase flow in wellheads and transportation pipelines. Similarly, during the production of natural gas, the natural gas flowing from the natural gas well often contains condensate and condensate or formation water. The measurement of the flow rate of each phase of oil, gas and water is an important production link for production calculation of each oil and gas well and block, optimization of oil and gas reservoir management, and enhanced recovery. The commonly used measurement method is to separate n...

Claims

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Application Information

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IPC IPC(8): G01F1/74G01F7/00G01F15/00G01F15/08G01F1/36G01N22/04G01N9/36
Inventor 陈方非何琪
Owner 天津瑞吉德科技有限公司
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