High-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning apparatus

Abstract

The invention discloses a high-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning apparatus. The apparatus comprises an apparatus shell, the apparatus shell comprises four layers, the apparatus shell is sequentially provided with an autoclave body, a heating sleeve, a heat insulation sleeve and a lead sheath from inside out, the upper end and the lower end of the autoclave body are respectively covered with an upper autoclave body end cover and a lower autoclave body end cover. Compared with traditional semiconductor X-ray detectors, the high-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning apparatus adopting fluorescence paper as an X-ray receiving device realizes an experiment scheme that the receiving device is placed in high-temperature and high-pressure environment. X rays emitted by an X-ray machine permeate a beryllium window, the permeated X rays and confining pressure gas helium irradiate a rock core and form an image on the fluorescence paper to obtain a resolution image of 25 frames / second and being greater than 5 lp / mm. The emitted and received X rays do not traverse through the autoclave body shell, so avoid the influences of the autoclave body shell on the scattering and weakness of the X rays, and experiment requirements of 150 DEG C high temperature and 70 MPA are met.

Description

technical field [0001] The invention relates to a CT scanning device, in particular to a CT scanning device for a high-temperature and high-pressure rock core dynamic oil displacement experiment. Background technique [0002] The objective understanding of various oil displacement mechanisms is the key to improving oil and gas recovery in oil and gas fields, and microscopic oil displacement experiments are an important means for people to study microscopic oil displacement mechanisms. During traditional oil displacement experiments, the fluid distribution is invisible, and only the inlet and outlet pressures and the flow rate of oil, gas and water can be measured macroscopically, so the mechanism of action of the displacing agent is relatively vague. The visualized microscopic oil displacement physical experiment can reflect the fluid distribution inside the core, and has become an important method for people to study the microscopic oil displacement mechanism. [0003] In ...

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Problems solved by technology

[0007] The invention provides a high-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning device, which can effectively solve the problem that in practical applications, the laser etching oil displacement model experiment method does not conform to the actual oil displacement process, and the pressure and temperature of the nuclear magnetic resonance oil displacement experiment method are not ideal. , and the outer wall of the kettle in the CT scanning experiment method has strong scattering and attenuation of X-rays, causing problems such as unclear images

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