Damage Mechanism of Oil-Based Drilling Fluid Flow in Seepage Channels for Fractured Tight Sandstone Gas Reservoirs

Table 6

Relationship between shear rate and shear stress of OBDF (50°C).

Shear rate (S^-1)	Shear stress (Pa)
	80/20	70/30	60/40	50/50	40/60	30/70
1021.38	7.83	14.03	17.94	102.60	151.20	328.50
510.69	4.84	8.79	12.21	70.40	100.80	253.60
340.46	4.09	6.70	9.94	55.40	79.20	191.40
170.23	2.76	4.72	7.45	40.50	58.40	153.30
10.214	1.15	2.11	3.51	21.30	29.30	74.70
5.107	1.15	2.09	3.38	20.50	28.00	69.50
1.702	1.06	1.75	2.80	16.60	22.10	57.60
0.851	0.96	1.61	2.30	12.20	16.40	39.80