Fuzzy Comprehensive Evaluation for Injection-Production Effectiveness in Medium-High Water Cut Stage

To effectively control the phenomenon of channeling and improve injection water utilization ratio, it is needed to distinguish the inefficient circulation areas where have channeling paths. Based on water drive reservoir characteristics and influential factors, the reservoir evaluation index system is formed including static and dynamic parameters. Quantitative grading, weights of factors and grading standards of the effectiveness are proposed based on fuzzy comprehensive evaluation theory. The effectiveness evaluation method and procedure were established combined oilfield practice. According to the established method, the injection -production effectiveness in Jiangsu Oilfield was analyzed, and the results will provide technical support for the implementation of comprehensive management for oilfields.