Page 277 - Well Control for Completions and Interventions

270 Well Control for Completions and Interventions

Table 7.9 Tubing and annulus volume
Section Volume

Annulus
5
3
Wellhead to 10/4 in. 3 9/8 in. cross-over 2000 ft. 3 0.0593 bbls/ft. 5 118.6 bbls
5
9/8 in. 3 5/2 in. annulus (2000 to 4800 ft.) 2800 ft. 3 0.0414 bbls/ft. 5 115.9 bbls
1
1
9/8 in. 3 4/2 in. annulus (4800 to 13,060) SSD 8260 ft. 3 0.051 bbls/ft. 5 421.2 bbls
5
Annulus volume 655.7 bbls
Tubing
1
5/2 in. tubing (0 to 4800 ft.) 4800 ft. 3 0.0232 bbls/ft. 5 111.36 bbls
1
4/2 in. tubing volume (4800 to 13,060 ft.) SSD 8260 ft. 3 0.0152 5 125.55 bbls
Tubing volume 236.91 bbls
Well volume (full circulation) 892.61 bbls
a density change reaches a change in tubing diameter. The steps calcu-
lated will be:
1. Oil reaches surface (all the gas has been removed from the tubing).
3
5
2. The 0.53 psi/ft. kill fluid in the annulus reaches the 10/4 in. 3 9/8 in.
casing cross-over.
3. The 0.433 psi/ft. packer fluid fills the tubing between the 5/2 in.3 4/2 in.
1
1
cross-over and the SSD.
4. The 0.53 psi/ft. kill fluid in the annulus reaches the 5/2 in. 3 4/2 in.
1
1
tubing cross-over.
5. The 0.433 psi/ft. packer fluid is completely filling the tubing.
6. Kill fluid fills the annulus.
1
1
7. Kill fluid in the tubing reaches the 5/2 in. 3 4/2 in. cross-over.
8. Full circulation.
Step 1, oil to surface:
• Tubing volume to GOC 3500 ft. 3 0.0232 bbls/ft 5 81.2 bbls.
• Kill fluid level in annulus when oil in tubing reaches surface.
3
1
• 81.2 bbls/0.0593 bbls/ft. (10/4 in. 3 5/2 in. annulus volume) 5
5
3
1369.3 ft. This is above the 10/4 in. 3 9/8 in. cross-over and in the
vertical section of the well.
• Packer fluid level in the tubing.
• 81.2 bbls packer fluid is in the tubing.
1
• 81.2 bbls/0.0152 bbls/ft. (4/2 in. tubing volume) 5 5342.10 ft.
above the SSD.
• OWC is at 13,060 ft. MD 2 5342.10 ft. MD 5 7718 ft. MD
• Vertical depth of oil/packer fluid contact in tubing when MD is
7718 ft. 5 7082 ft.