many thanks for your answer.
Unfortunately I don't have a production data and I can not make a decline curve analysis, Material balance calculation seems to be not useful in this kind of reservoir due to the transient flow .... we don' t reach a pseudo permanent regime.
The only solution in this case is a hydraulic fracturation because I am dealing with gas condensate fluid which may cause a condensate banking in the vicinity of the well. (my question is what's the best tool to simulate the hydraulic fracture in Eclipse)
I heard that now we can import the Stimplan results in Reveal (is anyone aware about it) (Stimplan doesn't handel a condensate fluid !!!)
for the horizontal well, I tried to do a simulation with a lot of well path but still not getting a good results (specialiy with the current economical issue)

Please could you advise