Critical flow nozzle flowmeter for measuring each gas-liquid two-liquid two-phase flow in multiphase flow and measuring method
A critical flow and multiphase flow technology, applied in the direction of measuring flow/mass flow, detecting fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effects, etc., can solve the problem of limited metering function of oil nozzles, inaccurate real-time metering of many Problems such as gas-liquid two-phase mass flow rate in phase flow
Active Publication Date: 2017-01-25
成都洋湃科技有限公司
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Problems solved by technology
However, the current metering function of the oil nozzle is very limited, and it cannot accurately measure the mass flow rate of the gas-liquid two phases in the multi-phase flow in real time.
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[0039] The following describes the measurement method of using the critical flow nozzle flowmeter of the present invention to measure the respective flow rates of the gas-liquid two phases in the multiphase flow, the method comprising the following steps:
[0040] a) Measure the pressure P at the inlet of the throttling nozzle with a pressure sensor 1 and the pressure P at the outlet 2 , the temperature T at the inlet of the throttling nozzle is measured by a temperature sensor 1 ;
[0041] b) Make the multiphase flow flow through the critical flow nozzle flowmeter in a critical flow manner, wherein it is judged that the multiphase flow has reached the critical flow by the following method: Let r be the ratio of the pressure at the outlet of the nozzle to the pressure at the inlet By measuring the value P 1 , T 1 Determine the gas phase density ρ g1 ; the mixture density value ρ is measured by monoenergetic gamma m , it can be seen that the gas phase mass holdup redef...
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The invention relates to a critical flow nozzle flowmeter for measuring each gas-liquid two-liquid two-phase flow in a multiphase flow. The critical flow nozzle flowmeter comprises a throttle type nozzle (1), a gamma ray detector, pressure sensors and a temperature sensor, wherein the throttle type nozzle (1) is provided with an inlet, an outlet and a throat part, wherein the circulation area of fluid of the throat part is minimum; the gamma ray detector comprises a gamma ray transmitter (2) and a gamma ray receiver (3), a mode of arranging the gamma ray detector makes gamma rays emitted by the gamma ray transmitter penetrate the cross section of the position of an inlet of the throttle type nozzle in the diameter direction and reach the gamma ray receiver; the pressure sensors are used for measuring pressures at the inlet position and the outlet position of the throttle type nozzle; and the temperature sensor is used for measuring the temperature at the inlet position of the throttle type nozzle. The invention further relates to a measuring method for measuring each gas-liquid two-liquid two-phase flow in the multiphase flow by using the critical flow nozzle flowmeter. The critical flow nozzle flowmeter is suitable for being used for an oil field well opening.
Description
technical field [0001] The invention belongs to the field of multiphase flow flow measurement. Specifically, the present invention relates to a critical flow nozzle flowmeter and a measurement method for measuring the respective flows of gas and liquid in a multiphase flow. Background technique [0002] In the oil and gas industry, oil and gas well products contain gas-liquid mixed fluid of liquid phase crude oil / water and gas phase natural gas, which is called multiphase flow in the industry. Wherein said gas phase includes such as oil and gas field gas or any non-condensable gas at normal temperature, specifically as methane, ethane, propane, butane, etc.; said liquid phase may include: oil phase, such as crude oil itself and in the crude oil extraction process Liquid additives dissolved in crude oil, and aqueous phases, such as formation water, water injected into oil and gas wells during production, and other liquid additives dissolved in the aqueous phase. In practice...
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IPC IPC(8): G01F1/36G01N23/02
CPCG01F1/36G01N23/02G01N2223/03G01N2223/1013G01F1/74G01N33/2823G01F1/42G01N23/095G01N33/28
Inventor 陈继革吴治永徐斌
Owner 成都洋湃科技有限公司