Small-scale deformation bands in Penrith Sandstone are used to assess the extent to which these features can act as effective mini-traps and contribute to secure CO₂ geological storage. A comprehensive set of simulation scenarios is applied to one conjugate set of deformation bands and also to clusters of deformation bands, to evaluate the effects of i) deformation band density; ii) the contrast in host rock/deformation band permeability; and iii) deformation band geometry, orientation and distribution on fluid movement and its significance for CO₂ storage capacity and security.

The findings of this study show that one conjugate set of deformation bands can improve CO₂ storage security, depending upon the plunge angle of the hinge. It has also been demonstrated that a high contrast in permeability (at least three orders of magnitude) is necessary for the CO₂ to be effectively trapped by the deformation bands.

It is shown that the highest number of bands observed and modelled for Penrith Sandstone outcrop, with three orders of magnitude permeability contrast, is a configuration that can contribute to the secure storage of CO₂ without causing an injectivity issue. This study shows that storage security is not only controlled by the contrast in permeability, but also by the permeability of the host rock. Furthermore, some geometries may contribute to storage security, while others may compromise it. To improve storage capacity and security for the type of reservoir studied herein, the results demonstrate the importance of accounting for the optimum injection rate and well placement.

Penrith砂岩中的小规模形变带被用于评估这些特征可以作为有效的微型圈闭并有助于确保CO ₂地质封存的程度。一整套模拟场景应用于一组变形带的共轭集以及变形带的群集，以评估i）变形带密度的影响；ii）宿主岩/变形带渗透率的对比；iii）变形带的几何形状，取向和在流体运动中的分布及其对CO ₂储存能力和安全性的意义。

这项研究的结果表明，一组共轭的变形带可以提高CO ₂储存的安全性，具体取决于铰链的插入角度。还已经证明，为了使CO ₂被变形带有效地捕获，渗透率的高对比度（至少三个数量级）是必要的。

结果表明，为Penrith砂岩露头观测和建模的最多条带，具有三个数量级的渗透率对比，是一种结构，可有助于安全存储CO ₂而不引起注入问题。这项研究表明，存储安全性不仅受渗透率对比的控制，还受基质岩渗透率的控制。此外，某些几何形状可能有助于存储安全，而其他几何形状可能会损害它。为了提高本文研究的储层类型的存储容量和安全性，结果证明了考虑最佳注入速率和井位的重要性。