Page 272 - Well Control for Completions and Interventions

266 Well Control for Completions and Interventions

Figure 7.8 Screen-dump from “Compass,” Halliburton’s well trajectory software.

• There is no gas correction value for 3500 ft. The correction factor
for 0.65 sg gas at 3000 ft. is 1.070 and 1.094 at 4000 ft.
Interpolation between the two known factors gives a gas correction
factor of 1.082.
• SITP is 2750 psi. Pressure at the bottom of the gas column
(3500 ft. TVD) is SITP 3 the correction factor,
2750 3 1.082 5 2975.5 psi-2976 psi.
• Oil hydrostatic:
• The oil column is reservoir depth to GOC.
• 11,256 ft. TVD-3500 ft. TVD 5 7756 ft. TVD.
• Oil gradient 0.35 psi/ft. 3 7756 ft. 5 2714.6 psi-2715 psi.
• 2715 psi (oil hydrostatic) 1 2967 psi (gas hydrostatic) 5 5691 psi.
• Reservoir pressure 5 5691 psi.

7.3.10.3 Calculate kill weight fluid needed to give 200 psi
overbalance at the sliding side door
• Gas hydrostatic is known already, 2976 psi.
• The oil column is 10,925 ft. TVD-3500 ft. TVD 5 7425 ft. TVD.