Heavy oil thermal recovery micro-displacement experimental system

Abstract

The invention provides a heavy oil thermal recovery microscopic displacement experiment system. The heavy oil thermal recovery microscopic displacement experiment system comprises an injection system, a model system, an output system, and an image acquisition and analysis system. The injection system is provided with a power source to provide displacement thermal fluid. The model system receives the displacement thermal fluid provided by the injection system, and uses an inert gas to apply and control circling pressure on the periphery of a micro model, so as to carry out a displacement experiment on heavy oil by the thermal fluid. The output system receives output liquid after the displacement experiment, and maintains certain return pressure. The image acquisition and analysis system performs dynamic observation and shooting on a microscopic displacement process, and researches microscopic percolation characteristics and displacement mechanism. Through improving heating heat-retaining property and sealing property of the experiment system and return pressure control design, the heavy oil thermal recovery microscopic displacement experiment system makes an experiment process and an experiment method more reliable. The system can carry out heavy oil thermal recovery microscopic displacement experiments, and researches displacement effect analysis and displacement mechanism.

Description

technical field [0001] The invention relates to the technical field of heavy oil oil field development, in particular to a microscopic displacement experimental system for heavy oil thermal recovery. Background technique [0002] Heavy oil has high viscosity, high density, and large flow resistance, so thermal recovery is currently the most effective recovery method. The high-temperature and high-pressure conditions of on-site thermal recovery of heavy oil make the currently commonly used glass microscopic model two-dimensional visualization simulation experimental device face new problems: 1) high temperature requirements from the entire experimental device and experimental method to systematically consider how to ensure the temperature of the entire experimental system, Thereby ensuring that the fluidity of the heavy oil is consistent in each part of the experimental device and throughout the experimental process; 2) High pressure requires the tightness of the entire exper...

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Problems solved by technology

The high-temperature and high-pressure conditions of on-site thermal recovery of heavy oil make the currently commonly used glass microscopic model two-dimensional visualization simulation experimental device face new problems: 1) high temperature requirements from the entire experimental device and experimental method to systematically consider how to ensure the temperature of the entire experimental system, Thereby ensuring that the fluidity of the heavy oil is consistent in each part of the experimental device and throughout the experimental process; 2) High pressure requires the tightness of the entire experimental device, which can keep the pressure system constant during the experimental balance and prevent the flow of different fluids during the experimental process. Switch the pressure system fluctuations during injection, thereby avoiding the influence of pressure fluctuations on the experimental results; 3) There is no consideration for back pressure control, and at the same time, it does not cause pressure fluctuations in the entire experimental system

[0003] The three Chinese patent applications with patent application numbers 200610165013.X, 200820123024.6, and 201310280351.8 all simply proposed glass microscopic model holders, but they are all high-temperature and high-pressure visualization experiments for conventional crude oil, and only hold the microscopic model. However, the design of the holder cannot meet the new needs of high temperature and high pressure in heavy oil thermal recovery experiments, and there is no design for heavy oil thermal recovery experiments from the perspective of the entire experimental system.

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