Prediction Model and Risk Quantification of Natural Gas Peak Production in Central Sichuan Paleo-Uplift Gas Reservoirs

Table 1

Production risk grade judgment criteria.

Risk level	Describe	Judgment criteria
Risk level I (the dark green area in Figure 4)	Yield targets are very easy to achieve	,
Risk level II (the light green area in Figure 4)	Yield targets are easy to achieve	(1) ,; (2) ,
Risk level III (the light yellow area in Figure 4)	Yield targets are easier to achieve	(1) ,; (2) ,
Risk level IV (the red area in Figure 4)	Yield targets are not easy to achieve	(1); (2) ,; (3)