Reservoir Characterization during Underbalanced Drilling of Horizontal Wells Based on Real-Time Data Monitoring

Table 4

Empirical constants used in the drilling fluid density calculation (from Isambourg et al. [15]).

·10^10; Pa^−1	·10^19; Pa^−2	·10^4; K^−1	·10^7; K^−2	·10^13; K^−1Pa^−1
2.977	−2.293	−1.957	−16.838	0.686