The net increase in anthropogenic carbon dioxide (CO₂) emissions from fossil fuel combustion contributes significantly to the global warming and climate change. CO₂ capture and storage (CCS) in geological formations, specifically in deep saline aquifers, is among the very promising strategies to control and mitigate emissions into the atmosphere. Injection of CO₂ into a reservoir may result in the formation of pore pressure which can initiate cracks and trigger fault activities. CO₂ may leak into the atmosphere and invade shallow groundwater sources. Release of CO₂ into the atmosphere has enormous effects on the environment and significantly contributes to global climate change. Therefore, storage safety, injection efficiency, and monitoring remain crucially important considerations in CO₂ injection. This study attempts to establish an optimal CO₂ injection strategy that aims at enhancing CO₂ storage with an increased safety at Ordos basin. Furthermore, it establishes the safety limits of CO₂ plume migration from the central axis of the injection well. In the investigation, injection parameters such as injection rate and bottom hole pressure were analyzed. The CO₂ plume migration analysis was performed, and migration limits were determined. Simulation results revealed that different formation layers have varying storage capacities and pressure withstanding ability. The site maximum storage rate goal of storing 100,000 t of CO₂ per year was attained. It is advised to perform injection at the Majiagou layer due to sufficient storage capacity and greater depth of over 2400 m from the surface. This study recommends that an optimum CO₂ sequestration strategy which does not result into excessive migration of injected CO₂ plume and limit formation pressure buildup should be adopted. Therefore, deep underground storage at an average depth of above 2400 m is optimum, because it has an adequate storage space to accommodate the desired rate of 100,000 t/year. Besides, its geological settings favor storage safety in the event of significant uplift that may cause induced seismicity. Furthermore, it will also limit CO₂ plume that may come into contact with shallow groundwater sources. Likewise, investing in low carbon and carbon-free energy technologies and enhancement of energy efficiency systems around the site is also recommended.

化石燃料燃烧产生的人为二氧化碳（CO ₂）排放量的净增加为全球变暖和气候变化做出了重要贡献。地质构造中，特别是深层盐水中的CO ₂捕集与封存（CCS）是控制和减少向大气排放的非常有前途的策略之一。将CO ₂注入储层可能会导致孔隙压力的形成，从而引发裂缝并触发断层活动。CO ₂可能泄漏到大气中并侵入浅层地下水源。释放CO ₂进入大气层会对环境产生巨大影响，并为全球气候变化做出重大贡献。因此，在CO ₂注入中，存储安全性，注入效率和监控仍然是至关重要的重要考虑因素。这项研究试图建立一种最佳的CO ₂注入策略，该策略旨在通过增加鄂尔多斯盆地的安全性来增强CO _2的储存。此外，它确定了CO ₂羽流从注入井中心轴线迁移的安全极限。在研究中，分析了诸如注入速率和井底压力之类的注入参数。一氧化碳₂进行羽流迁移分析，并确定迁移极限。仿真结果表明，不同的地层具有不同的储水能力和耐压能力。达到了每年存储100,000吨CO ₂的站点最大存储速率目标。由于足够的储存能力和距地面2400 m以上的较大深度，建议在马家沟层进行注入。这项研究建议一种最佳的CO ₂隔离策略，该策略不会导致注入的CO ₂过度迁移应采用羽状流和限制地层压力累积。因此，平均地下深度在2400 m以上的深层地下储藏是最佳的，因为它有足够的储藏空间来容纳所需的100,000吨/年的储量。此外，其地质环境有利于在发生可能引起地震的大幅度隆升的情况下的存储安全。此外，这还将限制可能与浅层地下水源接触的CO ₂羽流。同样，还建议对低碳和无碳能源技术进行投资，并在场地周围增强能效系统。