摘要
吉林油田大情字井黑46区块属特低渗透油藏,水驱效果差,为改善油藏开发效果,选择合理的开发方式,在模拟油藏条件下,进行了水驱、N2、CO2和天然气长岩心泡沫驱室内模拟实验,以确定合适的注气类型及其对泡沫驱效果的影响。实验结果表明:吉林大情字井黑46区块特低渗透油藏水驱采收率低,见水早,无水采油期短。在该油藏条件下,N2、天然气泡沫驱阻力因子大于CO2泡沫驱,封堵能力更强。N2、天然气泡沫调驱提高采收率15%左右,明显好于CO2泡沫驱,且大情字井具有丰富的天然气源,在实际应用中,天然气更适合作为注入气体用于泡沫调驱技术。
Daqingzijing Black 46 block of Jilin oilfield belongs to extremely low permeability reservoir, accordingly, the water flooding effect is poor. In order to improve reservoir development effects, it is important to choose a reasonable development method. Under the condition of simulated oil reservoir, laboratory simulation experiment of water flooding, N2, CO2 and natural gas foam flooding is conducted, the gas injection type is determined and its effects on foam flooding are studied. The research shows that in Daqingzijing Black 46 block of Jilin oilfield, the recovery is low, water breakthrough time is early and water-free oil production period is short. Under the condition of this reservoir, resistance factors of N2 and natural gas foam flooding are greater than CO2 foam flooding, and the shut off capacity is stronger, in addition, the recovery has improved about 15 % by N2 and natural gas foam flooding, and the effect is much better than CO2 foam flooding. In practical applications, natural gas is a better injection gas for foam flooding technology and Daqingzijing has abandant natural gas.
出处
《油气藏评价与开发》
CSCD
2016年第6期18-20,共3页
Petroleum Reservoir Evaluation and Development
基金
国家自然科学基金"重力超覆下气体连续‘剥蚀’稠油边界层的驱油机制研究"(51574200)
关键词
注气类型
特低渗透油藏
泡沫驱
提高采收率
gas injection type, extremely low permeability reservoir, foam flooding, enhanced recovery
