中文摘要：

泛滥的 CO2 被认为最有效的提高的油恢复(EOR ) 的不仅一方法，而且为地质的 CO2 的一种重要选择存储。在这份报纸， CO2 泛滥的可视化用 400 MHz NMR 微成像的系统被学习。为气体的 CO2 不能混合的排水量，它被发现那 CO2 channeling 或摸由于液体粘性和密度的差别发生了。因此， sweep 效率是小的，最后的剩余油浸透是 53.1% 。为 supercritical CO2 能溶合的排水量，结果证明那像活塞的排水量发生了，粘滞的摸和气体的低粘性和密度引起的严肃撤销有效地被制止，并且 CO2 前面的速度是一致的。sweep 效率那么高最后的剩余油浸透是 33.9% ，它显示 CO2 能溶合的排水量能多于 CO2 不能混合的排水量提高油恢复。另外， CO2 前面的平均速度通过分析油浸透侧面被评估。一个特殊核心分析方法被使用了在原处给浸透数据上油直接评估本地 Darcy 阶段速度和毛状的分散率。

英文摘要：

CO2 flooding is considered not only one of the most effective enhanced oil recovery （EOR） methods, but also an important alternative for geological CO2 storage. In this paper, the visualization of CO2 flooding was studied using a 400 MHz NMR micro-imaging system. For gaseous CO2 immiscible displacement, it was found that CO2 channeling or fingering occurred due to the difference of fluid viscosity and density. Thus, the sweep efficiency was small and the final residual oil saturation was 53.1%. For supercritical CO2 miscible displacement, the results showed that piston-like displacement occurred, viscous fingering and the gravity override caused by the low viscosity and density of the gas was effectively restrained, and the velocity of CO2 front was uniform. The sweep efficiency was so high that the final residual oil saturation was 33.9%, which indicated CO2 miscible displacement could enhance oil recovery more than CO2 immiscible displacement. In addition, the average velocity of CO2 front was evaluated through analyzing the oil saturation profile. A special core analysis method has been applied to in-situ oil saturation data to directly evaluate the local Darcy phase velocities and capillary dispersion rate.