为提高二氧化碳捕集、利用与封存（CO₂ capture, utilization and storage, CCUS）末期CO₂地质埋存能力，提出氨水强化CO₂埋存方法，向储层注入氨水，利用氨水与CO₂发生化学反应提高CO₂埋存量。通过高温高压物理模拟装置和岩心驱替装置，选定实验参数范围为20 MPa、40 ~ 80 ℃、氨水浓度6% ~ 26%，选取高渗岩心进行实验，明确了氨水与CO₂的反应规律和岩心中氨水强化CO₂埋存效果。结果表明，氨水吸收CO₂的量与氨水浓度呈正比，与温度呈反比，但低温会析出碳酸氢铵晶体，减少氨水吸收CO₂的量；氨的吸收能力与氨水浓度呈负相关，与温度没有明显的线性相关性；在60 ℃条件下，6%浓度的氨水表现出最佳的CO₂吸收效果；与饱和地层水相比，饱和6%浓度氨水可使岩心的CO₂埋存量提高7.5倍；岩心迂曲度每增加0.5，氨水强化埋存的单位岩石孔隙体积CO₂埋存量可以增加200 mL，而地层水埋存的单位岩石孔隙体积CO₂埋存量仅增加11 mL。该研究首次提出了一种新的二氧化碳埋存模式并开展实验研究，为CCUS项目强化二氧化碳地质埋存提供了一种新思路和新途径。

In the advanced phase of CCUS(CO₂ capture, utilization and storage), a technique for increasing the CO₂ geological storage capacity using ammonia water was suggested. Ammonia water was injected into the reservoir, where it reacted with CO₂ to expand the storage volume. A high-temperature, high-pressure physical simulation device and core flooding apparatus was utilized to narrow down the experimental parameters for 20 MPa, 40 ~ 80 ℃, and an ammonia water concentration of 6% ~ 26%. The interaction between ammonia and CO₂ and ammonia's efficacy in amplifying CO₂ storage were clarified through the experiments. The results show that the amount of CO₂ absorbed by ammonia is proportional to the concentration of ammonia, and inversely proportional to the temperature. But ammonium bicarbonate crystals will be precipitated at low temperature, reducing the amount of CO₂ absorbed by ammonia. The absorption capacity of ammonia is negatively correlated with ammonia concentration, but had no obvious linear correlation with temperature. Saturated 6% ammonia water increases the CO₂ storage volume in cores by 7.5 times compared to saturated formation water. Moreover, with every 0.5 increase in core tortuosity, the CO₂ storage volume per unit rock pore volume in ammonia-enhanced storage increases by 200 mL, whereas that in formation water storage only rises by 11 mL. An innovative CO₂ storage model and conducts experimental research is presented for the first time, which provid a new approach and method for enhancing CO₂ geological storage in oil and gas field CCUS projects.