Experimental Study on the Suspension Amount of Invasion Gas in Drilling Fluid with Yield Stress

Table 1

Rheological parameters of experimental solution.

Quality score (%)	Yield stress (Pa)	(Pa·s)		Correlation coefficient
0.55				0.973
0.7				0.993
0.73				0.994
0.76				0.99935
0.79				0.989
0.82				0.978
0.87				0.962
0.92				0.999
0.95	8.984 ± 0.03	0.108 ± 0.002	0.633 ± 0.003	0.959
1.1				0.948
1.2				0.976
1.4				0.962
1.5				0.963

Where is the consistency coefficient; Pa·s: is the flow index.