摘要
胜利油田高89-1块注CO2时注入气体单向突破现象较为突出,直接制约了原油采出程度的进一步提高。为此,结合最低混相压力试验和油藏概念模型,提出了3种表征气窜的气油比变化模型并进行了模拟研究。对气窜影响因素的研究表明,储层渗透率、非均质性和裂缝对气窜均有明显影响。现场应用实例表明,3种气油比变化模式对于现场判断气窜类型并采取针对性措施有重要的指导作用。
In Block GAO 89-1single-way breakthrough of CO2 injecting was serious,it directly restricted the improvement of oil recovery rate,therefore in combination with laboratory MMP experiment and conceptual reservoir model,this paper puts forward three models for characterizing the changing of gas-oil ratio of gas channeling and numerical simulation is carried out.The results indicate that reservoir permeability,heterogeneity and fracture have obvious influences on gas channeling.Field application shows that 3kinds of gas-oil ratio changes provide a guidance for judging the type of gas channeling and taking preventive measures for controlling it.
出处
《石油天然气学报》
CAS
CSCD
2012年第3期153-156,169,共4页
Journal of Oil and Gas Technology
基金
中石化科技重大先导试验项目(P07087)
