Abstract: It is an important base for the analysis to reservoir engineering and the design for the oil production method to how tpredict the productivity of the horizontal well accurately. For it self theoretical limitation, there is the serious error on the commonly method to predict the stable productivity. This paper i
based on the unsteady flow theory and looks on the reservoi flow and wellbore flow of horizontal well as a coupling system.The transient flow mathematic model under the coupling of th reservoir and wellbore was established. It has considered som complicated factor, such as the fluid friction loss, the change omomentum, the inflow of the sidewall of wellbore etc. Th
model is based on boundary integral method and can assembl with any reservoir model. It will provide the advanced metho for horizontal well to research reservoir engineering, the wel completion and oil production design.

Key words: horizontal well, performance predict, tran