CAJ | 학술논문

CO2驱是提高原油采收率和实现温室气体埋存的双赢举措，在中国具有广泛的应用前景。开展CO2混相驱可行性评价是CO2驱矿场实施的重要基础。基于文献和矿场经验，分析了CO2混相驱的不利因素，指出了CO2混相驱过程中需要重点考虑的问题以及发展趋势。提出CO2混相驱可行性评价主要包括：油藏筛选、室内实验评价、油藏数值模拟、经济风险评价、先导试验等环节，并对各个环节进行了分析。同时认为，可行性评价还需要考虑CO2注入过程中对储层、扰流或气窜、腐蚀、钙质与沥青质沉积等的影响，指出CO2混相驱成功的重点是保证油藏中较高的混相程度和CO2波及效率，在油藏方案和工程方案基础上，通过经济效益论证才能保障CO2混相驱的可行性。
CO2구시제고원유채수솔화실현온실기체매존적쌍영거조，재중국구유엄범적응용전경。개전CO2혼상구가행성평개시CO2구광장실시적중요기출。기우문헌화광장경험，분석료CO2혼상구적불리인소，지출료CO2혼상구과정중수요중점고필적문제이급발전추세。제출CO2혼상구가행성평개주요포괄：유장사선、실내실험평개、유장수치모의、경제풍험평개、선도시험등배절，병대각개배절진행료분석。동시인위，가행성평개환수요고필CO2주입과정중대저층、우류혹기찬、부식、개질여력청질침적등적영향，지출CO2혼상구성공적중점시보증유장중교고적혼상정도화CO2파급효솔，재유장방안화공정방안기출상，통과경제효익론증재능보장CO2혼상구적가행성。
CO2 flooding is a win-win measure for enhanced oil recovery and burial of greenhouse gases,which has a widely applied prospect in China. CO2 miscible flooding feasibility evaluation is an important foundation for the implementation of the field-scale. On the basis of considerable field application experience and literatures,we analyzed the negative factors of CO2 miscible flooding and pointed out an important consideration problem of CO2 miscible flooding process,as well as the development trend,and proposed feasibility evaluation of CO2 miscible flooding including:reservoir screening,laboratory measurements,reservoir simulation,economic and risk analysis,pilot testing. We hold that the feasibility assessment also needs to consider the impact of reservoir CO2 injection on spoiler or gas channeling,corrosion,calcium and asphaltene deposition, and point out that the success of CO2 miscible flooding focus is to ensure a higher mixed level of the reservoir and CO2 sweep efficiency. Based on the reservoir and engineering programs,the feasibility of CO2 miscible flooding can be ensured by the economic demonstration.