Coupled fluid-flow and geomechanical analysis of caprock integrity has gained a lot of attention among scientists and researchers investigating the long-term performance of geologic carbon storage systems. Reactivation of pre-existing fractures within the caprock or re-opening of faults can create permeable pathways which can influence the seal integrity. Stability of the caprock during and after injection of super-critical CO${}_2$, and the impact of pre-existing fractures in the presence or absence of one or multiple faults have been investigated in this study. The impact of the wellbore orientation and the injection rate are among other key factors in understanding the structural trapping mechanisms within such geological formations. In this study, we numerically investigated the impact of each of these factors. This study revealed the interplay between joints and faults and how different leakage pathways are formed and under which scenario they play a dominant role in terms of CO${}_2$ leakage. This study also highlights the role of one versus multiple faults in the domain and the importance of the fault hydrological property in forming leakage pathway.

盖层完整性的流体流动和地质力学耦合分析在研究地质碳存储系统的长期性能的科学家和研究人员中引起了很多关注。重新激活盖层中先前存在的裂缝或重新打开断层可以形成可渗透路径，从而影响密封的完整性。超临界CO注入过程中和注入后盖层的稳定性${}_{\mathrm{2个}}$在这项研究中，已经研究了存在或不存在一个或多个断层时预先存在的裂缝的影响。井眼方位和注入速率的影响是了解此类地质构造内构造圈闭机制的其他关键因素。在这项研究中，我们用数值方法研究了每个因素的影响。这项研究揭示了节理和断层之间的相互作用，以及如何形成不同的泄漏途径，以及在哪种情况下它们在CO方面起着主导作用。${}_{\mathrm{2个}}$泄漏。这项研究还强调了一个断层与多个断层在该区域中的作用，以及断层水文特性在形成泄漏路径中的重要性。