Main technical countermeasures of enhanced oil recovery during high water cut stage in La-Sa-Xing reservoirs

Since La-Sa-Xing ( refers to Lamadian,Saertu and Xingshugang reservoirs in Daqing oilfield ) reservoirs entering into high water cut stage,aimed at purposes of recognizing the reservoir’s property and development contradictions of multi zone heterogeneous pay zones,based on geological study and field test,multi time infilling adjustment,stabilizing oil production and controlling water cut techniques,tapping oil potential through controlling water cut and polymer flooding are formed and developed. As summing up these techniques and application achievements,further study direction in enhanced oil recovery is put forward in La-Sa-Xing reservoirs.