Evaluation of Water Injection Development Effect of Chang 8 Ultra-low Permeability Reservoir in Baihe District of Wuqi Oilfield
Since the waterflooding time of Chang 8 reservoir in Baihe block of Wuqi oilfield has been more than 10 years,the evaluation of waterflooding development effect is conducive to oilfield exploitation efficiency.Based on the comprehensive evaluation of the development effect of Chang 8 reservoir in Baihe area,the main development contradictions are as follows:low well opening rate,many low production and low efficiency wells,high natural decline rate,low formation pressure maintenance level and low water drive recovery efficiency.