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

Table 5

Results of the simulation with originally suggested drillability coefficients and normalization values with the aim of minimizing the relative error.

	Lower boundary [unitless]	Upper boundary [unitless]	Calculated coefficients [unitless]
	0.5	1.9	1.083550
	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	0.651057
	0.3	1.5	0.300000
	0.3	0.6	0.402447
-squared	−2.6091334
Relative error	0.4572496