Flow pattern and pressure simulation experiment device and method for two-phase flow of wellbore of air and water mixed injection well

Abstract

The invention provides a flow pattern and pressure simulation experiment device and method for two-phase flow of a wellbore of an air and water mixed injection well. The device mainly comprises an experiment loop, an supporting system and a measurement and control system, and can realize flow pattern and pressure experimental simulation for air-water two-phase down flow of vertical, tilting and horizontal sections of the air and water mixed injection well. Experimental mediums comprise air and water; the air is supplied by an air compressor, and the water is supplied by a centrifugal pump; the air and the water flow into the vertical pipe section, the tilting section and the horizontal section after passing through an air-liquid mixing section; all the pipe sections are transparent organic glass pipes, so that the flow pattern can be conveniently observed; pressures at two ends are respectively measured through pressure sensors; the angle of the tilting pipe section can be adjusted within 0 to 90 degrees, so that flow pattern and pressure experimental simulation for the air-liquid two-phase down flow of the tilting pipe section under any angle condition can be realized; the flow pattern of the air-liquid two-phase down flow of each pipe section can be shot through a high speed camera. The flow pattern and pressure simulation experiment device and method can realize the flow pattern and pressure experimental simulation for the air-water two-phase down flow of the vertical, tilting and horizontal sections of the air and water mixed injection well.

Description

technical field [0001] The invention belongs to an experimental device for gas-water mixed injection to enhance oil recovery in an oil and gas field, and in particular relates to a gas-water mixed injection wellbore two-phase flow pattern and pressure simulation experimental device and method. Background technique [0002] Gas-water mixed injection is an important process for enhancing oil recovery in oilfields, and accurate prediction of wellbore pressure is an important method for dynamic monitoring of gas-water mixed injection wells. Gas-water mixed injection wells are typical gas-liquid two-phase downflow. In crude oil production, the research on two-phase upflow is relatively mature. Among them, scholars such as Duns&Ros, Hagedorn&Brown, and Orkiszewski have studied the two-phase upflow in vertical pipes in detail. type and pressure drop calculation method, and the gas-liquid two-phase downflow has been studied more in boilers, cold and heat exchangers, and nuclear ener...

AI Technical Summary

Problems solved by technology

Gas-water mixed injection wells are typical gas-liquid two-phase downflow. In crude oil production, the research on two-phase upflow is relatively mature. Among them, scholars such as Duns&Ros, Hagedorn&Brown, and Orkiszewski have studied the two-phase upflow in vertical pipes in detail. type and pressure drop calculation method, and the gas-liquid two-phase downflow has been studied more in boilers, cold and heat exchangers, and nuclear energy, but less in the petroleum field. Accurately predicting the flow pattern of gas-liquid two-phase flow is the calculation method. The basis of liquid holdup, friction, and pressure drop, due to the existence of gas-liquid two-phase downflow slippage, the calculation of downflow liquid holdup is more complicated, so it is necessary to study clearly the gas-liquid two-phase downflow in the process of gas-water mixed injection type

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