中文摘要：

地层非均质程度不同,驱油体系有效提高采收率所需的黏度及界面性能有所不同。本文针对双河油田IV5-11层系油藏及原油特点,设计不同非均质条件仿真物理模型,对室内静态实验优选出的4个化学驱油体系进行室内岩心驱替实验。实验结果表明,均质条件下,表面活性剂浓度（3g/L）一定,聚合物浓度分别为1.5g/L和1.0g/L的SP二元体系提高采收率幅度基本相同;Na2CO3浓度（10g/L）、表面活性剂浓度（3g/L）一定,聚合物浓度1.5g/L的弱碱ASP三元体系提高采收率幅度比聚合物浓度1.0g/L的弱碱ASP三元体系高2.26%。优选聚合物浓度为1.5g/L的复合体系,改变渗透率级差至2倍、3倍和5倍,随非均质性增强,与SP二元体系相比,弱碱ASP三元体系提高采收率优势逐渐变弱;在模拟具有油藏代表性的3倍渗透率级差条件下,聚合物浓度1.5g/L的弱碱ASP三元体系提高采收率比SP二元体系高出2.15%,最终确定适合双河油田IV5-11层系的驱油配方为弱碱ASP三元体系,即1.5g/LZL-Ⅱ＋3.0g/LQY-3＋1.0g/LNa2CO3。

英文摘要：

The viscosity and interfacial properties of oil-displacement system required to enhanced oil recovery is different with the Heterogeneous degrees of the heterogeneity reservoir.Considering the condition of layer IV 5-11 of Shuanghe oilfield,the physical model simulations were designed and four systems were screened through core flooding experiments based on the static evaluation data of different oil-displacement systems comprised of emulsifying agent QY-3,HPAM（ZL-Ⅱ） and sodium carbonate.As for the homogeneous artificial cores,at the same concentration of emulsifying agent（3 g/L）,the displacement efficiency of surfactant-polymer（SP） combinational systems with HPAM concentration of 1.5 g/L and 1.0 g/L was similar.At the same concentration of sodium carbonate（10 g/L） and of emulsifying agent（3 g/L）,the enhanced oil recovery（EOR） of the alkali-surfactant-polymer（ASP） combinational system with HPAM concentration of 1.5 g/L was 2.26% higher than that of HPAM concentration of 1.0 g/L.For the heterogeneous cores with difference of permeability of 2 times,3 times and 5 times,the advantage of ASP system,compared with SP system with the same concentration of HPAM,of 1.5 g/L,became unconspicuous.In the condition of simulating reservoir with 3 times difference of permeability,the EOR of the ASP system is 2.15% higher than that of SP system,as a result,the ASP system of 1.5 g/L ZL-Ⅱ ＋ 3.0 g/L QY-3 ＋ 1.0 g/L Na2CO3 was determined to be the optimum system.