CO2地质封存联合深部咸水开采（CO2驱水技术，CO2-EWR）的新型CCUS（CO2捕集、利用和封存）技术是一种促进西部发展、加强我国能源安全的双赢选择。我国陆地及大陆架分布有大量的沉积盆地，可用于CO2封存的咸水层体积巨大，而可靠合理地评估CO2封存容量及其驱水量是封存场址选择的重要前提。本文采用国际上较为通用的金字塔评价方法评估了我国25个主要沉积盆地的CO2封存容量，并根据沉积及涌水量特征，选择三个典型盆地建立算例模型，根据各盆地与算例模型的体积比推算出其潜在驱水量。研究结果表明，中国25个主要沉积盆地深部咸水层CO2封存容量约为1191.95×108t，相当于中国大陆地区2010年CO2排放总量的14.31倍，潜在驱水量约为40.90×108t，大约能够使 10个上规模的煤化工企业正常运行20年。其中西部地区沉积盆地分布面积广，可驱替出的水资源量大，能够很大程度上缓解该区能源生产所造成的水资源短缺危机。

CO2 geological storage and deep saline water recovery（CO2 Enhanced Water Recovery , CO2-EWR）system, as a new CCUS （CO2 capture, utilization, and storage）technology, is a win-win choice for enhancement of China’s energy security and promotion of western development. A large number of sedimentary basins are distributed in the mainland and continental shelf of China, which have a large volume of saline water layer for storage of CO2. The reliable and reasonable assessment of CO2 storage capacity and water recovery is an important prerequisite for storage site selection. In this paper, the universal pyramid method is adopted to assess the CO2 storage capacity for 25 major sedimentary basins. Three typical sedimentary basins are chosen to develop example models to determine the potential driven water quantity using the volume ratio between basins and the example models based on the deposition and inflow characteristics. The results show that the total storage capacity of CO2 in the deep saline water layers of 25 major sedimentary basins is about 1191.95×108 t, which is equal to 14.13 times of the total CO2 emission of China in 2010. The potential driven water is about 40.90×108 t, which is enough for 10 coal chemical enterprises with 20 years of operation. The sedimentary basin has a large distribution in the western region of China and the driven water resources quantity is abundant which can alleviate the water resources shortage problem during the production of energy.

中科院百人计划；中澳二氧化碳地质封存（CAGS）