In order to clarify the influence of supercritical CO

2

immersion on the physical properties of glutenite reservoirs with different clay mineral content in Mahu under the conditions of Xinjiang Mahu glutenite reservoir. Several researches have been done. Firstly

the type and proportion of clay minerals in the reservoir were determined according to the results of X-ray diffraction （XRD）：kaolinite （1.52 %）

montmorillonite （0.42 %）

chlorite （0.73 %）

illite （0.68 %）. Secondly

the core which is close to the pore permeability of reservoir core is made ma

nually. Finally

under the condition of reservoir temperature at 70 ℃ and pressure of 20 MPa

using supercritical CO

2

high-temperature and high-pressure reaction device

and the experimental study on the influence of supercritical CO

2

immersion on the permeability of sandy conglomerate reservoir with different clay mineral content was carried out. The results show that when the clay mineral content is 2.5 % ~ 6.0 %

the permeability of the reservoir increases after the injection CO

2

the lower the clay mineral content

the shorter the action time and the more obvious the permeability increase. When the clay mineral content in the reservoir is greater than 7.5 %

with the increase of the action time

the permeability gradually decreases

and the higher the clay mineral content is

the greater the decrease is. When the clay mineral content is 6.0 % ~ 7.0 %

CO

2

has the best effect on improving reservoir permeability.