页岩岩电参数与岩石孔径的关系及其应用

Relationship between shale rock electrical parameters and rock pore size and its application

本文选取了表征页岩孔隙结构的气体吸附等温曲线模型中适用的BJH模型,对胶结指数m,饱和度指数n与岩石孔径之间的关系进行了研究;同时,岩心核磁数据与岩石孔径之间也存在相应关系。结合这两种关系就可以通过岩心核磁数据计算出随深度变化的m、n值,将计算值与实验值进行比对,发现效果良好。

BJH model is a kind of gas adsorption isothermal curve model which can reasonably characterize the pore structure of shale. The relationship between the shale pore size and the rock cementation index m and the saturation index n is studied by using BJH data. At the same time, there is a corresponding relationship between the core NMR data and the rock pore size. According to these two kinds of relations, the m and n values with depth can be calculated by the core NMR data. Comparing the calculated values with the experimental values, it is found that the difference between them is not significant.