Dear Vinomarky
thank you for your attention in this matter
actually I have a pressure point @ 3550 m with 5760 psi in gas zone (pore pressure for gas I think!)
assume a water gradient about 0.48 & water density about 0.67
assume a gas gradient about 0.01
assume fracture gradient about 0.8

how can I find a contact in another reservoir in about 5000 m?

please help me in this matter
Regards
As stated already, you need a pressure point in the water leg. There is a reason that a big part of appraising a field is finding where the water leg is. Failing that, the best you can hope for is assume the water leg is in hydraulic connection to a regional aquifer for which you know where the water pressure gradient lies.