聚合物驱后进一步提高采收率的实验研究

AN EXPERIMENTAL STUDY ON FURTHER ENHANCEMENT IN OIL RECPOVERY AFTER POLYMER FLOOD HAVING BEEN PERFORMED

在具有大庆油田油层地质特征的人造物理模型上开展了包括水驱、一次聚合物驱、水驱、二次聚合物驱、水驱各阶段的聚合物驱油试验。试验结果表明，在一次聚合物驱之后注入分子量更高、浓度更大的聚合物或可在地层内交联的聚合物，可进一步提高油藏的采收率；在一次聚合物驱中使用可交联聚合物，提高采收率的效果更佳。详细介绍了油层物理模型的制作方法。

Some laboratory modelling experiments on oil displacement in artificial cores are conducted to seek the ways of further enhancing oil recovery from the reservoir having been polymerflooded.It is shown that for this purpose polymer of higher molecular mass of/and higher concentration and crosslinkable polymer can be used as flooding fluids suitable for Daqing heterogeneous reservoirs. The core making is described in detail.