Abstract: This paper applied the transient performance prediction model of horizontal well with coupled wellbore and reservoir that was found by Duan yong-gang etc to calculate and verify the model according to the result. The calculated results indi-cated that the effect of the horizontal well and reservoir form
and parameters are fully considered in the model. In the hori-zontal well, because the frictional drop is far bigger than accel-eration drop, in the fact application we can ignore the effect of acceleration of liquid in the wellbore. The horizontal well has an optimal horizontal length range. We can rapidly find out the op-timal length by using the coupled model. The coupled model de-
veloped had finer extended capability and provides a universal mode for reservoir engineering studies in different condition.

Key words: horizontal well, performance prediction, tran-sient, coupling