Mathematical Modeling Applied to Drilling Engineering: An Application of Bourgoyne and Young ROP Model to a Presalt Case Study

Table 4

Results of the simulation with originally suggested drillability coefficients and normalization values.

	Lower boundary [unitless]	Upper boundary [unitless]	Calculated coefficients [unitless]
	0.5	1.9	0.986866
	0.000001	0.0005	0.000001
	0.000001	0.0009	0.000900
	0.000001	0.0001	0.000001
	0.5	2.0	0.500000
	04	1.0	0.702963
	0.3	1.5	0.300000
	0.3	0.6	0.599998
-squared	−1.9388546
Relative error	0.5067288