孔隙结构对碎屑储集岩物性控制作用的定量描述

油气储集岩的微观孔隙结构对其物性具有重要的控制作用.通过扫描电镜的直接观察和对应的孔渗物性分析揭示了微观孔隙结构与岩石孔渗性能呈良好的正相关关系.由常规压汞法可以提取多项表征储集层微观孔隙结构的特征参数,使用对应分析数学地质手段筛选出主控因素.通过多元线性回归,获得了储集岩孔隙度、渗透率与其孔隙结构参数之间的定量关系,以及储集岩孔隙度与其孔隙结构参数及矿物组成之间的定量关系.这些定量关系证明了孔隙结构对碎屑储集岩物性的明显控制作用,为储集岩孔渗性能的预测提供了新的手段.

Quantitative characterization of the controlling effect of pore structure on the physical property of clastic reservoir

The micro-pore structure of reservoir rock has important controlling effects on its physical property. The direct observation by scanning electron microscope and the analysis of corresponding physical property displays that the micro-pore structure has an obvious positive correlativity with the porosity and the permeability of reservoir rock. Different types of the characteristic parameters of the micro-pore structure of reservoir rock can be selected by means of mercury injection method, and then the main controlling parameters of them can be extracted by corresponding analysis. The quantitative relationships between porosity & permeability of reservoir rock and the primary controlling parameters of its micro-pore structure and the quantitative relationships between porosity & permeability of reservoir rock and the mineral compositional parameters of reservoir rock are got by multiple regression analysis. Those quantitative relationships prove the clear controlling effect of the micro-pore structure of clastic reservoir on the physical property of it, and they provide a new means for forecasting the physical property of clastic reservoir.