Numerous studies have investigated the fundamental mechanisms by which CO₂ flooding can increase oil production by altering the properties of the hydrocarbon fluid, including oil swelling, viscosity and interfacial tension reductions, and the extraction of light-to-intermediate components. However, the interactions between CO₂ and hydrocarbon fluid may also cause several problems, such as asphaltene precipitation due to crude oil's instability during the CO₂ flooding process. This study investigates the complex factors that affect the instability of crude oil, including CO₂ injection pressures, temperatures, and crude oil compositions. The light-dead oil samples taken from two Indonesian oil fields were used. The impacts of the instability of crude oil on CO₂ displacement performance were also observed to evaluate oil recovery and minimum miscibility pressure (MMP). The observation was performed using a slim tube under varying CO₂ high-pressure injections at 90 °C and 70 °C. The produced oils were analyzed based on their polarity component, saturates, aromatics, resins, and asphaltenes fractions, to observe the changes in oil composition and colloidal index instability. The results showed that increasing temperatures at given pressures resulted in higher oil recovery. Moreover, the asphaltene and resin fractions in the oil produced at a lower temperature significantly decrease compared to those at a higher temperature. It was also shown that asphaltene tends to precipitate more easily at a lower temperature. The other phenomenon revealed that the lighter oil resulted in a lower recovery than the heavier oil at a given pressure and temperature and correspondingly higher MMP. It was also suggested that CO₂ flooding is more likely to cause asphaltene precipitation in light oils.

_{许多研究已经调查了CO 2}驱油通过改变烃类流体的性质来提高石油产量的基本机制，包括石油膨胀、粘度和界面张力降低以及轻质至中质组分的提取。_{然而，CO 2}与烃类流体之间的相互作用也可能引起一些问题，例如在CO ₂驱过程中由于原油的不稳定而导致沥青质沉淀。本研究调查了影响原油不稳定的复杂因素，包括 CO ₂注入压力、温度和原油成分。使用从印度尼西亚两个油田采集的轻质油样品。还观察了原油的不稳定性对CO _{2驱替性能的影响，以评估石油采收率和最小混相压力(MMP)。使用细管在不同的 CO 2}下进行观察90 °C 和 70 °C 高压注射。对采出油进行极性组分、饱和烃、芳烃、树脂、沥青质等组分分析，观察原油组成和胶体指数不稳定性的变化。结果表明，在给定压力下升高温度会导致更高的石油采收率。此外，与高温下生产的油相比，在较低温度下生产的油中的沥青质和树脂组分显着减少。还表明，沥青质在较低温度下更容易沉淀。另一个现象表明，在给定的压力和温度下，较轻的油导致的采收率低于较重的油，并且相应地具有较高的 MMP。也有人建议 CO ₂水淹更有可能导致轻质油中沥青质沉淀。