Factors affecting CO₂ flooding of shale oil reservoir were studied by nuclear magnetic resonance (NMR) experiments, the effects of time, pressure, temperature on the recovery of CO₂ flooding in shale oil reservoir were analyzed based on nuclear magnetic resonance T₂ spectrum, and the effect of fracture development degree on recovery of CO₂ flooding in shale oil reservoir was analyzed based on NMR images. In the process of CO₂ flooding, the recovery degree of the shale oil reservoir gradually increases with time. With the rise of pressure, the recovery degree of the shale oil reservoir goes up gradually. With the rise of temperature, the recovery degree of shale oil increases first and then decreases gradually. For CO₂ flooding in matrix core, the crude oil around the core surface is produced in the initial stage, with recovery degree going up rapidly; with the ongoing of CO₂ injection, the CO₂ gradually diffuses into the inside of core to produce the oil, and the increase of recovery degree slows down gradually. For CO₂ flooding in matrix core with fractures, in the initial stage, the oil in and around the fractures are produced first, and the recovery degree goes up fast; with the extension of CO₂ injection time, CO₂ diffuses into the inside of the core from the fractures and the core surface to produce the oil inside the core, and the increase of recovery degree gradually slows down. Fractures increase the contact area between injected CO₂ and crude oil, and the more the fractures and the greater the evaluation index of fractures, the greater the recovery degree of shale oil will be.

影响CO因素₂页岩油储层驱通过核磁共振（NMR）实验，研究，时间，压力的影响，对CO的恢复温度₂在页岩油积存驱是基于核磁共振进行分析Ť ₂谱，基于核磁共振图像分析了裂缝发育程度对页岩油藏CO ₂驱采收率的影响。在CO ₂过程中随着时间的推移，页岩油储层的采收程度逐渐增加。随着压力的升高，页岩油藏采收程度逐渐上升。随着温度的升高，页岩油的采收程度先升高后逐渐降低。基质岩心CO ₂驱初期，岩心表面周围原油产出，采收程度迅速提高；随着CO ₂的不断注入，CO ₂逐渐扩散到岩心内部产油，采收程度的增加逐渐减慢。对于 CO ₂带裂缝的基质岩心驱油，初期先开采裂缝内及裂缝周围的油，采收程度上升快；与CO的延长₂注射时间，CO ₂扩散到从骨折芯与芯表面的内侧，以产生油核心的内部，并且恢复程度的增加而逐渐减慢。裂缝增加了注入的CO ₂与原油的接触面积，裂缝越多，裂缝评价指标越大，页岩油的采收程度越大。