and a pool occurs only when N is greater than 1.From the capillary curves, the original oil saturation is calculated, which averages 67% for reservoirs in the middle section of Maling oil field as against 60% measured from cores.

• 用最小含油喉道半径所对应的有关压力在毛管压力曲线上求出油藏的原始含油饱和度。 计算出马岭中区各油藏的原始含油饱和度平均为67%25,而油基泥浆取心实测的原始含油饱和度平均为60%25。