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

Table 5

Rheological test of oil base drilling fluid in its original state.

Shear rate (S^-1)	Viscosity (mPa·s)
	40°C	50°C	60°C	70°C	80°C	90°C
1021.38	38.87	36.72	32.51	28.88	25.75	23.20
510.69	47.97	45.43	39.16	33.88	30.55	27.41
340.46	60.80	57.57	50.23	43.18	37.89	31.13
170.23	82.24	77.54	67.56	57.57	51.70	41.71
10.214	597.23	538.49	509.12	421.00	381.84	323.09
5.107	1507.76	1076.97	979.07	861.58	783.25	685.35
1.702	3289.66	2995.94	2643.48	2408.50	2173.53	1879.81
0.851	6344.35	5991.88	5051.98	4464.54	4112.08	3642.12