Experimental Study of the Flow Mechanism of Deep Lacustrine Carbonate Reservoirs in the Yingxi Area of the Qaidam Basin

Table 3

Threshold pressure gradients of the cores with different pore structures and their fitting parameters.

Pore structure	Sample No.	(10^−3 μm^2)				Threshold pressure gradient (MPa/cm)
			Fractures	Sy60	112		36.68	50.55	36.71	0.00216
Sy21	1.17	1.53		2.00	1.54	0.0205
Matrix pores	Sy36	0.115	0.473	0.573	0.480	0.0579
	Sy29	0.434	3.04	4.15	3.07	0.0261

: gas permeability of the core sample.