油藏物理学一油藏岩石的毛管压力曲线 If there are oil and water in the reservoir Poa =Pua If the section area is so large Poa Pob +Pogh (2) Poa Pub +Pwgh (3) (2)-(3): Pb-Pb=(pn-P。)gh Pob-Pb=P。油藏物理学——油藏岩石的毛管压力曲线 If there are oil and water in the reservoir Poa  Pwa If the section area is so large Poa  Pob  o gh Poa  Pwb   w gh （3） (2)－(3)： o b wb c o b wb w o P P P P P gh     (   ) （2）