Page 33 - Well Control for Completions and Interventions

Introduction and Well Control Fundamentals 27

Figure 1.13 Hydrostatic pressure calculation. Oilfield units.

o
34 API oil from surface to 4600 ft TVD
Fresh water from 4600 to 7500 ft TVD (8.33 ppg)
Formation water from 7500 to 9250 ft TVD; top of reservoir
(9.7 ppg) (Fig. 1.13).
Calculate the hydrostatic pressure at the top of the reservoir.
1. Calculate the hydrostatic pressure of the oil column:

141:5
SG 5 5 0:8549
34 1 131:5
Density in ppg 5 0.8549 3 8.33 5 7.12 ppg 3 0.052 3 4600 5
1704 psi
2. Calculate the hydrostatic pressure of the fresh water column.

ð7500 4600Þ 3 8:33 3 0:052 5 1256 psi
3. Calculate the hydrostatic pressure of the formation water column.

ð9250 2 7500Þ 3 9:7 3 0:052 5 883 psi