By the laboratory experiments, the injectivity and EOR range of ASP flooding and moreover the adsorption loss of chemicals for Class Ⅲ oil reservoirs are evaluated. The results show that the ASP EOR is more than 16. 93% than that of water flooding. ASP system can be injected normally in those oil reservoirs of which effective permeability is more than 30 × 10-3 μm2 , the alkali sensitivity cannot cause bad damage to the oil reservoirs. Comparing with Class Ⅰ and Ⅱ oil reservoirs, the adsorption amount of the polymer in Class Ⅲ reservoirs is nearly the same, but the adsorption amount of the surfactant increases by about 20% , so the adsorption loss of the surfactant should be considered in ASP flooding. From the experimental results and oil displacing mechanism, it is feasible for ASP flooding in Class Ⅲ oil reservoirs.%通过室内实验评价了三类油层三元复合驱注入能力、提高采收率幅度及化学剂吸附损失程度.结果表明:三类油层三元复合驱可比水驱提高采收率16.93％；在有效渗透率30×10-3μm2以上的油层三元复合体系能够实现正常注入,三类油层的碱敏性不会对油层产生严重的伤害；与一、二类油层相比,三类油层聚合物的吸附量相近,表面活性剂的吸附量增加约20％,三元复合驱时需要考虑表面活性剂吸附损失的影响.根据实验结果及驱油机理分析,认为三元复合驱应用于三类油层是可行的.
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