Simulation experiment device system for porous medium microscopic seepage

Abstract

The invention discloses a simulation experiment device system for porous medium microscopic seepage, which mainly comprises a precise injection pump, a high pressure container, a camera acquisition system, a microscope imaging system, a microscopic model simulation device, an automatic metering system, a back pressure control device, and a computer image processing system; the precise injection pump is connected with the microscopic model simulation device through the high pressure container; the camera acquisition system and the microscope imaging system are disposed above the microscopic model simulation device; both the camera acquisition system and the microscope imaging system are connected with the computer image processing system; the microscopic model simulation device is also connected with the automatic metering system through the back pressure control device; a constant temperature control system is disposed below the microscopic model simulation device; the automatic metering system is also independently connected with the computer image processing system. The simulation experiment device system can realize visual observation of the flowing phenomenon of multi-phase fluid in a porous medium, and the interaction between the fluid and the porous medium, realize more thorough automation of the experiment, and provide more accurate experiment data.

Description

technical field [0001] The invention relates to a porous medium microscopic seepage simulation experiment, in particular to a device system for a multiphase fluid flow experiment in a porous medium. Background technique [0002] The problem of multiphase fluid seepage in porous media plays an important role in many fields, especially in petroleum engineering and civil engineering. In oil and gas field development experiments, using reservoir cores to conduct indoor water flooding experiments is a traditional method in physical simulation experiments. , the displacement efficiency and fluid flow law can be obtained by this method, which plays an important role in understanding the characteristics and laws of reservoir fluid seepage, but it cannot directly observe the microscopic seepage process of fluid in the reservoir pores and the chemical flooding process during chemical flooding. Mechanism of the influence of chemical agents on crude oil. [0003] Application number: 20...

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Problems solved by technology

[0004] Although the above public documents have realized the purpose of real-time dynamic observation and image acquisition of the foam microstructure by realizing the image acquisition system and computer, the computer processing application is not thorough enough, because even if the output fluid separation metering system can be accurately measured, However, it is not connected to the computer and cannot be automatically processed by the computer, so the degree of automation is still not enough; and the foam seepage simulation system is composed of multi-measuring point sand filling pipes, pressure sensors and six-way valves, the foam seepage simulation system and the output fluid separation metering system An image acquisition system is also connected between them. The image acquisition system is composed of a foam microstructure observation window, a magnifying foam microstructure microscope, a color camera and a computer. If the structure is too complex and the process is too long, it is easy to make the gas-liquid fluid lose the original best simulation experiment state. Based on this situation, even the data processed by the magnified foam microstructure microscope, color camera and computer are still inaccurate.

Another point is that although the gas-liquid injection system consists of a micro-volume advection pump, a gas mass flow controller and a high-pressure gas cylinder, the injection capacity is not enough and it does not have a pressurization function, and because it is multi-media, only one injection pump is not enough Yes, for a variety of different displacement media, the displacement mechanism must be equipped with multiple sets of displacement hydraulic piston cylinders to achieve the maximum effect

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