摘要
利用化学驱物理模拟流程装置及填砂管模型研究了乐安油田草4块不同温度下稠油的热水驱与热化学驱的驱油效果及变化规律。结果表明,提高油藏注入水的温度,可以明显降低原油粘度,提高稠油的采收率。而对于油水界面张力达到超低(10-3mN/m数量级)的热化学驱,虽然通过油水界面张力降低,提高了驱油效果,但由于驱替通道阻力减小,后期实际驱替液流动的波及体积减小,导致最终采收率与同温度下单纯水驱相比低3%～5%。因此,单纯的热化学驱不适合乐安油田草4块稠油开发。
In the paper, the physical simulation and sand-packed model is used to study the effects and changing patterns of hot water flooding and chemical flooding of heavy oil at various temperatures in Cao4 fault-block Lean oil field. The uhralow interfacial tension chemical flooding (achieving 10-3 mN/m) can reduce oil-water interfacial tension and improve effects of flooding. Due to the reduction of flooding resistance, the actual flooding swept volume is reduced accordingly, and may cause the ultimate oil recovery 3% -5% lower than the water flooding. Hence, the hot chemical flooding is not suitable for the heavy oil development in Cao4 fault-block Lean oil field.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第3期64-66,115,共3页
Petroleum Geology and Recovery Efficiency
基金
国家重大专项"高温高盐油藏化学驱技术应用研究"(2008ZX05011-006)
关键词
热水驱热化学驱耐温性性能评价乐安油田
hot water flooding
hot chemical flooding
high temperature performance
performance evaluation
Le'an oilfield
