Assessment of CO2 Storage Capacity and Saline Water Development in Sedimentary Basins of China
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Abstract:
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.
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