Study On The Potential Evaluation And The Storage Areas Of The Carbon Dioxide Seabed Storage In Offshore China

Reducing the carbon dioxide emissions has become the consensus and goals of the international community and the seabed sequestration of carbon dioxide is one important way to achieve the carbon dioxide emission reduction. The seabed sequestration of carbon dioxide has attracted extensive attention from the developed countries and the developing countries for its advantages and huge potential contributions to economize energy resources. The study on the potential evaluation and the storage areas of the carbon dioxide seabed storage in offshore China will provide strategic decision basis and technical reserves for the national seabed geological storage of carbon dioxide.In this paper, the based theory of the carbon capture and storage (CCS) technology is presented and the research status at home and abroad and the main storage practices of CCS are summarized. The necessity and feasibility, the advantages and disadvantages of carbon dioxide storage in China are also analysised. By summarizing the method of foreign, the method of the potential evaluation of the carbon dioxide seabed storage in offshore China is established and the effective storage capacity of the offshore sedimentary basins is estimated. The methods of the ecological environment sensitivity and vulnerability assessment are established to assess the potential ecological environmental effect on the leakage of the carbon dioxide seabed storage. Moreover, the method of the regional research of the carbon dioxide seabed storage is established through the reseach of the storage suitability and the storage capacity of the the China offshore basins, the potential ecological environmental effect on the leakage of the carbon dioxide seabed storage and the distance to the emission sources.The results show that the total storage capacity of the eleven offshore basins is about25000×108tons. In these offshore basins the Pearl River Mouth basin and the East China Sea Basin have the best storage suitability. So China has a good condition for carrying out geological storage carbon dioxide. Finally, the main bottlenecks of the seabed storage of carbon dioxide are discussed and the corresponding countermeasures and suggestions are displayed.