A full understanding of the subsurface processes relevant to CO₂ geo-sequestration, including CO₂ movement and trapping, requires establishing basic relationships between the sedimentary architecture in CO₂ reservoirs and the associated variations in petrophysical attributes that can affect plume dynamics and residual CO₂ trapping. In this context, the variance and covariance of petrophysical attributes of the lower Mt. Simon Sandstone reservoir (Illinois, USA) are quantitatively decomposed according to sedimentary textures and structures that vary among sedimentary facies. Building on Ritzi et al. (2016), the sedimentary facies of the lower Mt. Simon are re-classified with new interpretations of sedimentary structures. A newly-revised methodology is used in which factor interactions are formally quantified and the magnitude of their contribution to the variance is compared to the main-factor effects. The decomposition results show the main-factor effects contributing to the variance of permeability and porosity are the differences in grain-size and the presence or absence of bleaching textures. The differences in permeability or porosity among the newly defined sedimentary structures make a relatively small contribution to the sample variance, and the 2-way and 3-way factor interactions are negligible. Permeability and porosity increase with coarser grain size, independent of the presence or absence of bleaching and independent of sedimentary structure. The presence of bleaching textures reduces permeability and porosity independent of the grain size or sedimentary structure. The general approach and these specific results aid in developing parsimonious reservoir simulation models.

要全面了解与CO ₂固存相关的地下过程，包括CO _2的移动和捕集，需要在CO ₂储层中的沉积构造与可能影响羽流动力学和残留CO _2的岩石物性相关变化之间建立基本关系。诱捕。在这种情况下，较低的山的岩石物理属性的方差和协方差。西蒙砂岩储层（美国伊利诺伊州）根据沉积相和沉积相的不同而被定量分解。建立在Ritzi等人的文章上。（2016），下山山的沉积相。西蒙用沉积结构的新解释重新分类。使用一种新修订的方法，其中正式量化了因子相互作用，并将其对方差的贡献程度与主因子效应进行了比较。分解结果表明，影响渗透率和孔隙率变化的主要因素是晶粒尺寸的差异以及是否存在漂白质地。新定义的沉积物结构之间的渗透率或孔隙率差异对样品方差的贡献相对较小，而2向和3向因素的相互作用可忽略不计。渗透率和孔隙率随晶粒尺寸的增大而增加，与是否存在漂白无关，并且与沉积结构无关。漂白纹理的存在会降低渗透性和孔隙率，而与晶粒尺寸或沉积结构无关。通用方法和这些特定结果有助于开发简约的油藏模拟模型。与漂白的有无无关，与沉积结构无关。漂白纹理的存在会降低渗透性和孔隙率，而与晶粒尺寸或沉积结构无关。通用方法和这些特定结果有助于开发简约的油藏模拟模型。与漂白的有无无关，与沉积结构无关。漂白纹理的存在会降低渗透性和孔隙率，而与晶粒尺寸或沉积结构无关。通用方法和这些特定结果有助于开发简约的油藏模拟模型。