从油气藏形成机理与油气藏饱和度主控制因素入手,研究了饱和度与毛管压力关系,利用毛管压力饱和度理论构建核磁共振T 2分布谱的毛管压力,建立了核磁T 2分布谱法评价原始油气藏流体饱和度的新模型。在大庆深层天然气藏饱和度评价中运用该模型进行了含水(气)饱和度处理,结果表明核磁T 2谱饱和度处理结果与取心分析饱和度和生产测试饱和度一致性好,认为用核磁T 2谱法原始油气藏流体饱和度评价,对复杂、疑难储集层的测井饱和度解释具有实际应用意义。 Based on the formation mechanism of oil and gas reservoirs and the main controlling factors of oil and gas reservoir saturation, the relationship between saturation and capillary pressure was studied. The capillary pressure saturation was used to construct the capillary pressure of T 2 distribution spectrum. A new model of fluid saturation in primary reservoir. The model was adopted to evaluate the saturation of deep natural gas reservoirs in Daqing. The results show that the consistency between the results of nuclear magnetic T 2 spectrum saturation and those of coring analysis saturation and production test saturation is good. The evaluation of the fluid saturation of the original reservoirs by T 2 spectroscopy is of practical significance for the interpretation of well saturation in complex and difficult reservoirs.