聚驱后基于井网优化的二元复合驱提高采收率研究

STUDY ON EOR OF BINARY COMBINATION FLOODING BASED ON WELL PATTERN AD JUSTMENT AFTER POLYMER FLOODING

为研究聚驱后如何进一步提高采收率,运用人造物理模型制作技术制作三维物理模型,实施聚驱后进行优化注采井网调整。实验表明:聚驱后井网调整方案最终采收率要高于井网不调整方案4.49个百分点,故实施优化注采井网调整更有利于聚驱后进一步提高采收率;井网不调整二元驱提高采收率过程,各层贡献率基本一致,井网调整二元驱提高采收率过程,高渗层采出油最多,低、中渗层基本一致。将该研究应用于矿场,取得了良好的效果,具有一定的推广作用。

In order to study how to further improve oil recovery after polymer flooding,three-dimensional physical model is made by using artificial physical model,and well pattern adjustment is carried out after polymer flooding based on the physical model.Experiments show that the final recovery of well pattern adjustment scheme after polymer flooding is 4.49%higher than that of non-adjustment scheme.Therefore,well pattern adjustment is more beneficial to further enhance oil recovery after polymer flooding.Without adjusting well pattern in the binary combination flooding,the contribution rate of each layer is basically the same.With adjusting well pattern in the binary combination flooding,the most oil is produced in the high permeability layer,while the low and medium permeability layers are basically the same.The research has been applied in the oilfield,and good results have been achieved,which has a certain effect for promotion.