摘要
采用微观驱油实验和油藏数值模拟,研究了聚合物—表面活性剂二元复合体系微观及宏观驱油特征。以河南双河油田S块H层系为例的研究结果表明,二元复合体系既能启动柱状、簇状残余油,又可减少孔隙和喉道处的膜状残余油,相比单一表面活性剂驱和单一聚合物驱,二元复合驱具有显著扩大波及体积和提高驱油效率的双重效果,比单一聚合物驱提高采收率3.03%～5.45%。对于层内非均质储层,二元复合驱可较大幅度地提高低渗透带的采收率,其次是中渗透带;而对于层间非均质储层,进一步改善低渗透层开发效果的能力有限,二元复合驱提高采收率由高到低的排序为中、高、低渗透层。
Based on the microscopic displacement experiments and reservoir model, herein, we study the polymer-surfactant compound system characteristics of microscopic and macroscopic displacement. Taking the block of Shuanghe oilfield as example, the results show that the compound system can not only displace the column and cluster residual oil, but also reduce the residual oil at the pore and throat, and it has dual function of enlarging swept volume and improving the displacement efficiency. Its displacement is better compared to the single surface active agent and the single polymer flooding, and its EOR is 3.03 to 5.45 percent higher than polymer flooding. It can improve the low permeability zone, and the heterogeneous reservoir followed by the infiltration zone. For non-homogeneous reservoir layer, it is limited to further improve development performance for low permeability layer. The EOR performance of dual flooding are high to low for moderate, high, and low permeablelayers in the reservoir.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第3期53-56,114-115,共4页
Petroleum Geology and Recovery Efficiency
