Abstract: A new method on reservoir heterogeneity characterization in reservoir numerical modeling is presented
based on end point scaling of pseudo-relative permeability. The relative permeabilities of each point of well log
around accuracy rating are first calculated from the relative permeability， which arises from core flooding tests.
Thus the pseudo relative permeability of a substratum consisting of many well log points around accuracy rating is
obtained. The function relation between pseudo relative permeability of a substratum and relative permeability from
labs is studied， which stimulated the presentation of relative permeabilities of all cells among wells in reservoir nu-
merical modeling. The amount of relative permeability of all cells is determined from reservoir numerical simulator.
It has been proved that flow characteristic of oil-water two phases in layered sandstone reservoir could be modeling
more accurately based on the above method.

Key words: sandstone reservoir, reservoir numerical modeling, heterogeneity, pseudo relative permeability, endpoint scaling