【摘要】 为研究不同温度下水蒸气对碳质页岩孔隙结构及渗透性的影响，将碳质页岩分组置于无水、过热水蒸气两种加热环境中，并加热至300℃、400℃和500℃,对加热后的碳质页岩进行CT扫描和渗透性试验。结果表明：过热水蒸气环境下碳质页岩的裂隙发育程度明显比无水环境下的高，在300℃时，无水环境下碳质页岩没有产生裂隙，而过热水蒸气环境下裂隙宽度已经达到了12～58μm;碳质页岩在过热水蒸气加热条件下的孔隙率要远高于无水加热条件下的孔隙率，两者相差10倍以上；碳质页岩在过热水蒸气加热环境中的渗透率要远远高于无水加热环境中的渗透率，两者相差约2.5～18倍。更多还原

【Abstract】 In order to study the influences of pore structure and permeability of carbonaceous shales under superheated water vapor environments with different temperatures, the carbonaceous shales were grouped into two pyrolysis environments of anhydrous and superheated water vapor, and heated to 300 ℃, 400 ℃ and 500 ℃. Then, CT scanning and permeability tests were carried out on the heated carbonaceous shales. The experimental results are concluded as follows. Firstly, the development of cracks in carboniferous shale under superheated water vapor is significantly greater than that under anhydrous environment. At 300 ℃, there is almost no crack in carboniferous shale under anhydrous environment, while the width of cracks in carboniferous shale under superheated water vapor has reached 12-58 μm. Secondly, the porosity of carbonaceous shale under superheated water vapor is much higher than that under anhydrous environment, and the difference between them is more than 10 times. Thirdly, the permeability of carbonaceous shale under superheated water vapor is much higher than that under anhydrous environment, with a difference of about 2.5-18 times.更多还原