Study on the Water Invasion and Its Effect on the Production from Multilayer Unconsolidated Sandstone Gas Reservoirs

Table 2

Comparison of the different encroaching water advance speeds.

Permeability (mD)	Encroaching water advance speeds under different production rates (cm/min)
	20	50	80	100	150
24.4	0.64	1.14	1.5	1.71	2.19
9.34	0.60	0.92	1.21	1.43	NWI
5.37	0.34	NWI	NWI	NWI	NWI
1.93	NWI	NWI	NWI	NWI	NWI