Primary Estimation of Capacity of CO2 Geological Storage in China

Capture and storage of industrial carbon dioxide (CO₂) is identified as one promising technology for CO₂-emissions mitigation to reduce the worsening global warming. This paper estimates the storage capacity for CO₂ of different geological storage options including sedimentary rocks, unmineable deep coal beds, oil fields and depleted natural gas reservoirs in China. The storage capacity for CO₂ are 12.078 Gt, 143.51 Gt, 10.17 Gt and 30.48 Gt in coal beds, deep saline aquifers, oil fields by CO₂-EOR and depleted gas fields, respectively. The geological storage capacity onshore are about 122.20 Gt accounting for 62.27% of total geological storage capacity, the left 37.73% of total capacity are located on continental shelf.