Abstract: Aiming at the existing problems in 4 types of water drive characteristic curves which are widely used at home, a simple f _w—R* water drive characteristic curve which integrates the relation of type A and type B is presented.Type C and type D are integrated to propose new water drive characteristic curves,which are the water drive characteristic curve expression equivalent completely equivalent to classic water drive characteristic curve,and able to reflect the relation of water cut-recovery degree,the shape and the feature are analyzed.It is pointed out that research direction for water drive characteristic curve in the future is to find out more simple,accurate and practical generalized water drive characteristic curve.Practical calculation indicates the established new types of water drive characteristic curve matches practical data well,and more reliable.

Key words: oilfield development, water drive characteristic curve, recoverable reserves, recovery degree