Analysis on high water cut stage water injection effect in Wangjiawan central region

Combined with Wangjiawan central region development practice, through the utilization factor of water injection, water drive characteristic curve, increased rate of water cut and injection-production pressure system index calculation, the Wangjiawan central region water flooding development effect is analyzed. The calculation results show that : with the increase of recovery degree, water flooding effect is better, but the injection-production volume is not balanced. The pressure adjustment system is proposed to perfect water flooding well patterns.