Taking a water bottom reservoir in Tarim Basin as an example

the results of developing the reservoir with horizontal well and vertical well are compared and studied in this paper.The results prove that horizontal well development is superior to the vertical well development.Then the mode of developing the reservoir with horizontal well according to reservoir engineering

physical test and reservoir numeric simulation were studied.A new method of calculating critical production and critical bettom flowing is proposed.It is suggested that

in developing water bottom reservoir with horizontal well

one should pay attention to the effect of horizontal and vertical permeability

and that different primary allocations may have different effects on developing results.The horizontal section of the horizontal well should be limited within 70%～90% of the relative thickness of oil layer.