Cyclic water-flooding effect evaluation in Xin-218 block of Jilin oilfield

In view of the status quo of fast water cut rising after well pattern adjustment in Xin-218 block of Jilin oilfield,by analyzing the problems existing in the water flooding process,the cyclic water-flooding adjustment measures have been carried out,including the determination of water injection cycles,the determination of water injection modes and the determination of water injection volume.After water injection in Xin-218 block,the well group production kept stable,the formation pressure restored,the water cut rising was under control,and therefore the apparent effect of stabilizing oil and water control were obtained.