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针对纵向非均质性严重的砂砾岩油藏,基于典型的分层砂砾岩图像,在不同层位选取代表性的岩心薄片分别构建相应的三维数字岩心,采用合并法构建砂砾岩数字岩心,并提取相应的孔隙网络模型,采用常规法构建相应的砂砾岩孔隙网络模型,对常规法和合并法得到的孔隙网络模型结构特征和渗透率特征进行对比分析。分析结果表明,合并法构建的砂砾岩孔隙网络模型能够描述其孔隙结构特征,且能有效地描述出砂岩介质在横向和纵向渗透率的差异特征,可为砂砾岩油藏岩心的精确表征及渗流机制的分析提供一套有效地研究思路。
For the gravel reservoir with serious longitudinal heterogeneity, based on the typical stratigraphic conglomerate images, representative three-dimensional digital cores were constructed by selecting representative core sheets at different layers, and the glutenite cores were constructed by the merge method The corresponding pore network model was extracted and the corresponding pore network model of glutenite was established by the conventional method. The structural characteristics and permeability characteristics of the pore network model obtained by the conventional and combined methods were compared. The results show that the pore-structure model of sand and conglomerate constructed by the method of combination can describe the characteristics of pore structure and can effectively describe the difference characteristics of permeability of sandstone in both horizontal and vertical directions. It can be used to accurately characterize the core of sandstone and conglomerate reservoir and seepage The mechanism analysis provides a set of effective research ideas.