The long-term CO₂ storage in deep saline aquifers mainly depends on the performance of caprock. However, one of the major concerns with deep saline CO₂ sequestration at geological time scales is the back-migration of injected CO₂ through the caprock due to chemico-mineralogical variations with time. Several studies, including geo-chemical models and laboratory tests, have investigated the behaviours of caprock in the presence of CO₂. This paper reviews laboratory and numerical studies of the geo-chemical properties of caprock, highlights the gaps in research and provides suggestions for future research on caprock characteristics in deep saline aquifers after CO₂ injection. Accordingly, a significant attention should be paid on potential field scale caprock reactivity in long term scale associated with geological CO₂ sequestration.

深层盐水中CO ₂的长期储存主要取决于盖层的性能。但是，在地质时间尺度上深层盐水CO ₂隔离的主要问题之一是由于化学矿物学随时间的变化，注入的CO ₂通过盖岩向后迁移。包括地球化学模型和实验室测试在内的几项研究已经研究了在CO ₂存在下盖层的行为。本文回顾了盖层地球化学性质的实验室和数值研究，突出了研究的空白，并为今后研究CO ₂后深层盐水层盖层特征提供了建议。注射。因此，应该长期关注与地质CO ₂隔离相关的潜在田间规模盖层反应性。