Theoretical Methods and Application Evaluation of Water Cut-Recovery Percent Ratio

Water cut-recovery percent ratio is a new parameter for evaluating development efficiency of water flooding reservoirs.Based on Type-A and Type-C water flooding curves,the theoretical expressions for water cut-recovery percent ratio and their theoretical curves are established,respectively,and the changing feature under different water flooding laws are revealed.The case application results show that the theory corresponds to field situation,and the methods can be used to evaluate development efficiency of water flooding reservoirs.