油气地质与采收率2011，Vol.18Issue(5)：51-53,3.
控制二氧化碳气窜泡沫配方体系的研制与应用——以宋芳屯油田芳48断块为例
摘要
Abstract
Due to the highly probable gas breakthrough in CO2 immiscible flooding, the development performance is seriously affected. In order to block off gas breakthrough channels, improve gas injection/production profile, and increase sweep volume & efficiency, two different acid-resistant and oil-resistant foam systems are developed according to reservoir characteristics and fluid features in Daqing peripheral oilfield. The foam system may be swelled by 4 times, the half-life is 83 h, and core resistance coefficient is 120 under the condition of Ph = 3 and 60% of oil saturation. Filed pilots show that the system can effectively block off gas channels, decrease inefficient circulation, increase CO2 sweep volume & efficiency as well as displacement efficiency. The gas injection pressure in pilot well rises by 3. 5 Mpa after subsequent gas injection. Dominant injection direction changes obviously and gas sweep area increases enormously. Connective wells'gas oil ratio decreases with an average valid period of 11 months and cumulative oil increment of 467 t. This gas breakthrough blocking technique is suitable for gas flooding development of Daqing peripheral oilfields which are of ultra-low permeability, and has the advantages of high efficiency and low costs. It provides a sound technique support for gas flooding development.关键词
二氧化碳驱/气窜/耐酸耐油型泡沫配方体系/现场试验/效果分析Key words
CO2 injection/gas channeling/foam formula of acid and oil resistant/field pilot/performance analysis分类
能源科技引用本文复制引用
刘向斌..控制二氧化碳气窜泡沫配方体系的研制与应用——以宋芳屯油田芳48断块为例[J].油气地质与采收率,2011,18(5):51-53,3.基金项目
国家高技术研究发展计划("863"计划)"CO2驱油注采工程技术研究"(2009AA063404). （"863"计划）
