Study and Application of Safety Risk Evaluation Model for CO₂ Geological Storage Based on Uncertainty Measure Theory

Table 2

Classification criteria of quantitative indexes.

Grade	Factors
	Total thickness of the cover layer (m)	Distance from permanent residents (m)	Distance from surface drinking water sources such as rivers and reservoirs (m)
High	<40	<800	<150
Medium	40–80	800±	150±
Low	>80	>800	>150