The result of vertical interference test shows that vados flow exists in Donghe sandstonereservoir. In incompletely opened oil wells with vertical vados flow

the flowing shape of fluidappears to be spherical vados flow

and it is the sum of planar and vertical vados flow. In formation test interpretation

plane radial flow method would result in serious deviation of permeability interpretation. But horizontal well and deflecting well could effeciently improve theproductivity of this kind of reservoir. The amount of improved productivity would increasewith the increasing of K

v

/K

h

; deflecting well could improve the productivity at any permeability ratia

and the result would be more favourable when inclination is greater than 40?. Incomparason

the horizontal well is much better than the deflecting well.