川中致密砂岩油藏表面活性剂驱油机理数值模拟

Numerical simulation on displacement mechanism of tight sandstone reservoir surfactant flooding in central Sichuan Basin

针对致密砂岩油藏开发过程中采收率较低的难题,以川中地区上三叠统须家河组致密砂岩油藏为例,结合油藏数值模拟,分析了注入速率、注入表面活性剂浓度、注入PV数对致密砂岩油藏采收率的定性和定量的影响,预测分析不同表面活性剂驱方案实施效果,给出在当前油藏条件下的最佳方案,得出了影响表面活性剂驱的主控因素。

Taking the tight sandstone reservoir of the upper Triassic, Xu Jiahe group in the Sichuan central region as an example, combing with the reservoir numerical simulation, then analyzing the qualitative and quantitative influences of injection ra te, injection concentration of surfactant, injection PV number on the recovery efficiency of tight sandstone reservoir, this paper focuses on the problem of the tight oil reservoir＇ s low recovery, and also forecasts the effect of the different surfactant flooding scheme, then presents the best plan in this reservoir condition, and acquires the main control factors of the surfactant flooding.