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核磁共振成像测井有助于表示油藏流体的特征及地层特性。在确定好地层评价目标和适当地选择采集参数的情况下；核磁共振成像测井法得出的信息是传统测量有效孔隙度和渗透率的方法所不及的。以松弛和油藏流体的扩散特性为基础发展的技术，提供的岩石物理数据可以用来测定油藏流体的性质；例如碳氢化合物的类型和洗油带的水饱和度。根据核磁共振流体的不同特性，应用差光谱法和时域分析法可以进行轻质原油、天然气和水等流体的区分。
NMR logging helps to characterize reservoir fluids and formation properties. In determining the target of formation evaluation and the appropriate choice of acquisition parameters, the information obtained by NMR logging is less than the traditional methods of measuring effective porosity and permeability. Techniques developed on the basis of relaxation and reservoir fluid diffusion characteristics provide petrophysical data that can be used to determine reservoir fluid properties; for example, the type of hydrocarbon and the water saturation of the washbelt. According to the different characteristics of the NMR fluid, differential spectroscopy and time domain analysis can be used to distinguish the fluids of light crude oil, natural gas and water.