Coalbed Methane Production System Simulation and Deliverability Forecasting: Coupled Surface Network/Wellbore/Reservoir Calculation

Table 1

Comparison of the four models.

Calculation method	Application	Calculation accuracy	Advantages/disadvantages
Model 1	GCF > 0.3	Relatively high	High precision, but large amount of calculation, narrow application scope
Model 2	All cases	Relatively high	Simple calculation process, high precision, good stability
Model 3	All cases	Change with the gas well conditions	Complex calculation process, poor stability
Model 4	All cases	Change with the gas well conditions	Large amount of calculation, poor stability