Two-phase fluid micro-metering device and method for forward and reverse displacement method

Abstract

Provided is a forward and reverse displacement method two-phase fluid micro-measuring device and method. The device comprises a to-be-measured mixed fluid inlet end, a micro-pipe, a constant-flux pump, an electronic balance I and an electronic balance II, wherein the electronic balance I is provided with a conical flask I for storing mixed fluid, the electronic balance II is provided with a conical flask II for storing water, the electronic balances are connected through the control of a computer, one end of the micro-pipe is respectively communicated to the to-be-measured mixed fluid inlet end and the conical flask I through a three-way valve, the other end of the micro-pipe is divided into two pipes, the outlet of one pipe extending into the inner bottom of the conical flask II is communicated with the conical flask II through a two-way valve, the other pipe is connected to the outlet of the constant-flux pump, and the inlet of the constant-flux pump is connected to a portion of thepipeline between the two-way valve and the conical flask II. The forward and reverse displacement method two-phase fluid micro-measuring device has wide application range, can effectively avoid the influence of a measured fluid velocity and a two-phase separation speed on the measurement in a conventional method, is applied to the two-phase measurement when inseparable phenomenons such as emulsification occur, realizes automatic computer monitoring and calculation, and has high degree of automation.

Description

technical field [0001] The invention belongs to the field of metering technology, and in particular relates to a device suitable for micro-metering two-phase fluids (such as gas-liquid, or oil-water) that are incompatible with each other and have a certain density difference produced during a core displacement experiment. and methods. Background technique [0002] In the oil and gas industry, indoor core displacement simulation experiments are often carried out to study the flow law of oil and gas in the reservoir, and provide scientific basis for accurately grasping the production dynamics of oil and gas wells, formulating development plans and tapping potential measures. In this type of displacement experiment, the produced fluid is usually a two-phase mixed fluid among oil, gas and water. In order to study the seepage law of the two-phase fluid in the core, it is necessary to measure the output of each phase fluid in real time at the outlet. In the experiment, one of th...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a forward and reverse displacement two-phase fluid micro-metering device and method, which is suitable for gas-liquid or oil-water metering, and solves the difficult problem of emulsion metering because it does not need to separate the mixed-phase fluid. And the device is not affected by the flow velocity, realizing the high-precision measurement of two-phase fluid

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