石油钻采工艺2026，Vol.48Issue(2)：226-233,8.DOI:10.13639/j.odpt.202508021
致密砂岩油藏减氧空气泡沫驱油效果及注采参数优化
Research on effect and injection-production parameters optimization of oxygen-reduced air foam flooding in tight sandstone reservoirs
摘要
Abstract
To investigate the adaptability and oil displacement efficiency of oxygen-reduced air foam flooding in tight sandstone reservoirs and optimize key parameters,a comprehensive study involving 3D geological modeling and numerical simulation was conducted based on the actual reservoir conditions of Block P in Yanchang Oilfield.The results prove that oxygen-reduced air foam flooding exhibits significantly superior advantages in enhancing oil recovery compared to water flooding,continuous gas flooding,and water-alternating-gas(WAG)flooding.Furthermore,regarding the implementation method of foam flooding,the gas-liquid alternating slug injection approach outperforms simultaneous co-injection.Particularly,it can increase the 10-year recovery factor by more than 3.5 percentage points and reduce the water cut by over 8 percentage points compared to water flooding.Sensitivity analysis of key injection-production parameters reveals that the injection-production ratio presents the most significant impact on displacement efficiency,followed by the gas-liquid ratio and foam solution concentration,while the slug cycle shows relatively less effect.In field application,it is recommended to maintain the injection-production ratio no less than 1.2,gas-liquid ratio of 3∶1,foam solution concentration of 0.45%,and slug cycle of 40 days,with subsequent adjustments based on dynamic injection-production responses.The field test results show that by implementing optimal well group selection,compared to water flooding,the water cut in reduced-o xygen air foam flooding was decreased by up to 24 percentage points,while the oil production was increased up to 88.46%.These findings provide a feasible approach for effectively improving the development performance in tight sandstone reservoirs and serve as valuable references for oxygen-reduced air foam flooding in similar reservoirs.关键词
减氧空气泡沫驱/致密砂岩油藏/注采参数优化/数值模拟/提高采收率Key words
oxygen-reduced air foam flooding/tight sandstone reservoir/injection-production parameters optimization/numerical simulation/enhanced oil recovery分类
能源科技引用本文复制引用
尚庆华,魏登峰,陈龙龙,王田田,王振宇,陈泽宇..致密砂岩油藏减氧空气泡沫驱油效果及注采参数优化[J].石油钻采工艺,2026,48(2):226-233,8.基金项目
延长石油集团科技攻关计划"富县大东沟长8致密油注气开发模式优化实验研究"(编号:ycsy2025yyjc-B-05)、"低界面张力耐盐型纳米颗粒增稳减氧空气泡沫驱技术研究"(编号:ycsy2023ky-B-30-01). （编号:ycsy2025yyjc-B-05）
