油藏物理学—相对渗透率 2.Effective permeability or phase permeability In presence of more than one fluid,permeability is called the "effective"permeability (Ko,Kw,or Kg being oil,water,or gas effective permeability respectively).2. Effective permeability or phase permeability In presence of more than one fluid, permeability is called the “effective”permeability (Ko, Kw, or Kg being oil, water, or gas effective permeability respectively). 油藏物理学——相对渗透率