不同注采方式下CO2埋存与驱油效果优化评价

工业和人类生活过程中产生的温室气体CO₂排放量日益增加，由此导致的空气污染和温室效应正在严重地威胁着人类赖以生存的环境。实行CO₂高效利用与地质埋存相结合的一体化技术思路是缓解环境污染压力、提高石油采收率的有效途径。针对这一问题，建立了目标函数，并应用商业软件对注CO₂驱的9套注采方案进行了数值模拟对比研究。结果表明：溶剂驱比纯CO₂驱的采收率更高，但减少了CO₂的埋存量；进行溶剂驱或水气交替驱到CO₂驱的转换可以使目标函数值更大；井控方法是CO₂埋存与EOR的最优方法，该方法累计产油量最大，储集的CO₂也最多。这些结论为油田三次采油提供了技术参考，也为减排CO₂提供依据。

Optimizing Evaluation of CO2 Storage and Flooding Effect under Different Injection-production Modes

Air pollution and greenhouse effect result from progressively greenhouse gas emission of carbon dioxide has posed a threat to human being's survival. Integrative technique thought of carbon dioxide high efficiency used combined with geologic sequestration is an effective way to alleviate the pressure on environment pollution and enhance oil recovery. Aiming at this issue, objective function has been established, and nine different injection scenarios of carbon dioxide flooding have been simulated by adopting Eclipse software to accomplish correlation study. This study indicates that high recovery factor will be obtained with solvent flooding compared with continuous CO2 injection, but the storage capacity decreased; objective function is larger with switching from solvent or WAG to CO2 flooding; and the optimized method of CO2 storage and EOR is well controlled scheme which has both the maximum cumulative oil production and the greatest number of gathered CO2. These results provide technical reference not only for the tertiary oil production in oil fields but also for the foundation of CO2 emission cuts.