关键词: 二氧化碳, 封存, 海底沉积物层, 水合物

Abstract: CO2 sub-sea sediments sequestration is considered as an effective method to mitigate global warming. The paper introduced hydrate self-sealing mechanism，formation conditions and stability zone，described the advance of kinetics for hydrate formation，including kinetics of hydrate nucleation，growth，and the driving force of hydration. The hydrate nucleation models are clustering nucleation model，extension model，interface nucleation model，and Chen-Guo model. The hydrate growth models are Englezos model，Kvamme model，exponential growth model，fluid flow model，and LB model. The driving forces of hydration are chemical potential difference，temperature difference，Gibbs free energy difference，concentration difference，pressure or fugacity difference. The KC model，NR model，parallel capillary bundle model，permeability decreasing model，and Morisdis’ relative permeability model were summarized to describe the evolution of the porosity and the permeability of sediments during hydrate nucleation and growth. Finally，some hydration experiments were introduced and related scientific problems on CO2 sequestration and hydrate formation in marine sediments were prospected.

Key words: carbon dioxide（CO2）, sequestration, sub-sea sediments, hydrate