Geological storage is one of potentially effective means of reducing anthropogenic atmospheric emission of CO2 to mitigate the worsening global climate change. Depleted natural gas reservoirs are likely be used to store anthropogenic CO2 because of their good geologic trap

huge storage capacities

existing infrastructures include transport pipelines and wells that can markedly reduce the cost of CO2 storage

and abundant experiences derived from underground natural gas storage projects. Based on the depth of gas fields derived from natural gas prospects and the natural gas reserve

the CO2 storage capacity in gas basins is estimated. About 304.83×108 t CO2 that is about 9.2 times as against the total CO2 emission of China in 2002 can be store in the gas basins. The proved CO2 capacity in gas basins reaches to 41.03×108 t which is 1.2 times as against the total CO2 emission of China in 2002.