中文摘要：

注CO2混相驱是一种提高原油采收率的重要手段，实施该方法的关键是筛选出具有开发潜力的油藏。目前，在注CO2混相驱油藏的筛选上，缺乏统一的筛选指标和筛选方法。通过对国内外注CO2混相驱油藏开采情况的分析和对比研究，选取了影响注CO2开采效果的12个筛选指标，利用概率与数理统计方法提出了筛选指标的评价标准，并应用模糊优选理论和模糊层次分析法，建立了区间数注CO2混相驱油藏筛选模型。应用该筛选方法对6个典型的候选油藏进行了筛选排序和综合评价。结果表明，该方法能够客观地评估油藏注CO2开发潜力的大小。

英文摘要：

CO2 injection miscible flooding is an important method for enhanced oil recovery （EOR）. It is important to screen out the potential reservoirs for using the method. Now, there aren＇t uniform screening indexes and method about screening out CO2 injection miscible flooding reservoirs. Based on the analysis and researches of the CO2 injection miscible flooding reservoirs, 12 indexes affecting CO2 injection miscible flooding results were picked out. By the method of probability statistics, the assessment criterions were brought forward. And combining with fuzzy optimum and fuzzy analytical hierarchy process （FAHP）, the interval number screening model for CO2 injection miscible flooding reservoirs was successfully established. This screening method was used to screen and assess six classical candidate reservoirs about CO2 injection miscible flooding. The results show that the method could perfectly evaluate and screen the potential of CO2 injection of the candidate reservoir.