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A microscopic visualization experimental method for high temperature and high pressure gas flooding in deep reservoirs

A technology of high temperature and high pressure and experimental method, applied in the direction of TV, color TV, electrical components, etc., can solve the problems of low repeatability, difficult to reproduce the high temperature and high pressure conditions of the real reservoir, and difficult to wash the rock, so as to ensure the service life and realize the The effect of displacement differential pressure gradient control and temperature reduction

Active Publication Date: 2022-07-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, this technology has great limitations. On the one hand, the rock will be worn during use, and the basic parameters of the rock will change with the experimental process, and the used rock is not easy to wash, and the repeatability is low; in addition, conventional microscopic flooding There are two main problems in the replacement experimental device. One is that due to the deep burial of complex oil reservoirs, high temperature and high pressure (70MPa, 150°C), it is difficult for conventional experimental devices to reproduce the high temperature and high pressure conditions of real reservoirs; on the other hand, Due to the small pore size, it is difficult for conventional experimental devices to intuitively display the migration laws of fluids with different properties in micro-nano-scale channels, and to conduct qualitative and quantitative analysis of the remaining oil distribution laws

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  • A microscopic visualization experimental method for high temperature and high pressure gas flooding in deep reservoirs
  • A microscopic visualization experimental method for high temperature and high pressure gas flooding in deep reservoirs

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Embodiment Construction

[0044] A microscopic visualization experimental method for high temperature and high pressure gas drive oil in deep reservoirs, using a microscopic visualization experimental device, such as figure 1 It includes reservoir temperature and pressure coordinated control system, displacement reaction system, data acquisition and video recording system and auxiliary system. The main function of the reservoir temperature and pressure coordination control system is to simulate the formation pressure and temperature of the rock formation in the real reservoir environment. The reservoir temperature and pressure coordination control system includes a high-pressure sealing holder 16 , a sapphire window 23 for easy observation is arranged on the high-pressure sealing holder 16 , and a reservoir confining pressure ring cavity 15 is formed inside the high-pressure sealing holder 16 . The reservoir confining pressure ring cavity 15 is connected to the shell inlet of the high temperature heat...

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Abstract

The invention discloses a microscopic visualization experiment method for high-temperature and high-pressure gas flooding oil in a deep oil reservoir, comprising the following steps: installing a glass etching model for simulating rock samples under actual reservoir conditions in a high-pressure sealing holder, vacuuming; The confining pressure fluid is injected into the confining pressure ring cavity of the layer, and the confining pressure is controlled by the confining pressure tracking pump; the confining pressure fluid in the confining pressure ring cavity of the reservoir is heated and heated by a high temperature heating vessel; the glass etching model is placed under a microscope; The crude oil and the displacing fluid medium were respectively put into the heated thermostatic piston container, and the back pressure unit was adjusted to the simulated formation pressure; the water injection and gas injection displacement experiments were carried out through the high pressure injection pump and the gas booster system. The invention can be used to simulate the oil-water-gas distribution state and fluid migration characteristics in the micro-nano-scale pore structure, quantitatively characterize the microscopic residual oil starting mechanism of high temperature and high pressure water flooding, gas flooding, and chemical flooding, and can be used for oil-water saturation in the process of oilfield reservoir development. The judgment of distribution and size has important guiding significance.

Description

technical field [0001] The invention relates to the technical field of microscopic displacement, in particular to a microscopic visualization experiment method for oil displacement by high temperature and high pressure gas in deep oil reservoirs. Background technique [0002] With more and more exploration and development activities in deeper and more complex formations worldwide, it is more and more difficult to tap the remaining oil under the conditions of deep high temperature and high pressure. Especially when the oilfield enters the stage of high water-cut development, the production declines, and the potential targets for mining and mining change from a large area of ​​connected remaining oil to a highly dispersed but relatively localized area. Due to the unclear understanding of the microscopic occurrence state and distribution law of the remaining oil, Seriously hindered the next step to tap the remaining oil potential. Therefore, it is particularly important to pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/04G01N15/08G01M10/00H04N5/76
CPCG01N13/04G01N15/08G01M10/00H04N5/76
Inventor 李蕾苏玉亮郝永卯张雪王文东付金刚高小刚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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