In waterflood development ,heterogeneous reservoir is a key
geological factor which controls the lifetime of high yield and
stable production periods. In this paper , the possibility of
introducing variance function into plane heterogeneous study has
been discussed and an example of using the method has been
given. The result of the 12th Block of Huzhuang Oilfield ,
Zhongyuan Oilfield has also demonstrated the credibility and
feasibility of using variance function in plane heterogeneous
study.