注聚末期及后续水驱综合调整方法及效果

Composite Modification Method and Effect in the Late Stage of Polymer Flooding and Successive Water Flooding

随着注聚规模不断扩大及深入,一些区块经历了空白水驱、注聚未见效期、见效期、含水低值期、含水回升期及后续水驱,已完成了聚驱全过程的开采。从已完成注聚区块不同阶段产油量比例中可以看出,聚驱后期含水回升期及后续水驱由于开采时间长,阶段产油量占40％左右,因此聚驱后期的综合调整对整个聚驱开发起着重要的作用。

As the expansion and deep going of polymer flooding, some blocks have experienced blank water flooding, non-response stage for polymer injection, response stage, low water cut stage, water bcut rising stage and successive water flooding, and now the overall polymer flooding has been completed. From the percentage of oil production in different stages of blocks where polymer flooding has been finished, phase oil production accounts for 40% during water cut rising stage of late polymer flooding as well as successive water flooding stage due to the long recovery period. So, the integrated modification of late polymer flooding is important for the overall polymer flooding development.