用核磁共振测井评价特低渗透砂岩储层渗透性新方法

核磁共振测井被广泛用于评价低孔隙度低渗透率储层的孔隙结构与渗透性，主要依据经典的Coates及SDR模型。这些模型是基于中高孔隙度、渗透率储层的实验结果，大量岩心实验数据表明它们并不适用于特低渗透砂岩储层。应用气象学研究常用的空间物理场分布模型定量评价低孔隙度特低渗透率储层中特定尺寸孔隙分布的集中程度，并给出了定量计算瓦分布均一系数模型。常规孔隙度渗透率实验、饱和盐水岩心核磁共振实验均验证了该模型在不同孔隙度、渗透率条件下具有较好的适用性。

A New Method on Permeability Analysis for Sand Reservoir with Specially Low Permeability by NMR

NMR logging has been widely used for evaluating the reservoir with low porosity and extra-low permeability,and the classic principal methods are Coates & SDR models which based on core analysis result with better properties matter.Abundant experimental core data show that the models don't apply to specially low permeability reservoir.Quantitatively evaluated is the concentricity of specifically size pores distribution in low porosity and specially low permeability reservoir by the Distribution Model of spec...