1. Well B14 / Operator X
Mediterranean Sea / Operator X
Well B14
Schlumberger Well Integrity Team
Mohamed El-Sadek
Ahmed El-Gamal
Moustafa Rakha
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2. Well B14 / Operator X
Agenda
 B14 Project Introduction
 Client Objectives
 Challenges
 Work Flow
 Conclusion& Recommendations
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3. Well B14 / Operator X
Introduction
- Location: Mediterranean Sea, Egypt
- Well Name : B14
- Operator: X
- Well B14 was drilled with several drilling problems
A14 B14
Well A 14 Well B14
Gas Cap at 3702 ft. The well plan was
based on Well A14Reservoir X P = 1300 psia
Reservoir Y P = 2500 psia
Water level at 5000 ft.
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4. Well B14 / Operator X
Intermediate Casing 9 5/8’’
 Total mud losses reported
 No open hole logs
 Liner was run with no
centralizers
 Cemented with 11.5 ppg
lead and 15.8 ppg tail
- Well Sktech
X
Y
B14 Well Schematic
2800 ft.
3702 ft.
1700 ft.
Gas Cap
5000 ft. Water
Liner Casing 7’’
Introduction
 Drilled with 16 ppg OBM
containing barite
 Cemented with 15.8 ppg
 Existing Fractures
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5. Well B14 / Operator X
A. Cement evaluation for to the entire zone of interest to ensure:
1. Zonal isolation between reservoirs Y and X
2. Hydraulic isolation from water zone and gas cap
Client Objectives
B. Completion system design to support production using choke size
44/64 with flowing pressure 800 to 900 psi and sand production.
C. Plug and abandonment plan
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6. Well B14 / Operator X
 Fractures in intermediate section
 Absence OH logs
 Liner ran without centralizers
 No Cement Execution Report
Challenges
- Well Sktech
X
Y
Well Schematic
2800 ft.
5000 ft.
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7. Well B14 / Operator X
Work Flow
Data gathering Planning Execution
Results
&
recommendations
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8. Well B14 / Operator X
TT=
15µs/cm
Zcement=
25.4×𝜌 𝑠𝑙𝑢𝑟𝑟𝑦
𝜌 𝑤𝑎𝑡𝑒𝑟
×𝑇𝑇
Zcement = 2.33 Mrayl
Planning phase
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9. Well B14 / Operator X
2.3
USIT limitation
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10. Well B14 / Operator X
Isolation Scanner
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11. Well B14 / Operator X
Liquid
Light weight cement
SLG Map
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12. Well B14 / Operator X
Identifying barite and
solid accumulations
Differentiate between light
weight cement & liquid
Assess hydraulic
isolation
Third interface
echoes “TIEs”
Other Applications
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13. Well B14 / Operator X
Log header
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14. Well B14 / Operator X
Execution phase
Gas cap
Water level
Perf X
Perf Y
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15. Well B14 / Operator X
Gas cap- PerfX
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16. Well B14 / Operator X
SLG Map
No Perforation at X
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17. Well B14 / Operator X
X-Perf Y- Water zone
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18. Well B14 / Operator X
SLG Map
Perforate at zone Y
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19. Well B14 / Operator X
Completion program
• Single completion
• Quantum PerfPac
• Chock size
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20. Well B14 / Operator X
Plug& Abandonment
 What if the well is dry?
- Well Sktech
X
Y
Well Schematic
1700 ft.
2800 ft. Depth selection criteria:
1. Good centricity
2. Free pipe
B14 Well Schematic
 Where to cut and retrieve?
Cut across the dual casing
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21. Well B14 / Operator X
 Example of a bad point to cut the 9 5/8’’ casing
At depth 156 ft.
- Cement presence
- Contact points
Plug& Abandonment
 Depth Selection
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22. Well B14 / Operator X
At interval 910 ft. to 960 ft.
- Solid presence
Plug& Abandonment
 Depth Selection
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23. Well B14 / Operator X
At interval 410 ft. to 435
- No solid presence
- Good centralization
Plug& Abandonment
 Depth Selection
Looks good !
 Recommended Depths: 415 ft. / 420 / 425 ft. / 430 ft.
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24. Well B14 / Operator X
1. No hydraulic isolation between gas cap and perforation X
2. Good hydraulic isolation between formation Y and both water zone and
formation X
3. Single completion and Quantum Perf Pac System
4. Recommended depths for P&A operastion are 415 ft. / 420 /
425 ft. / 430 ft.
Conclusion
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25. Well B14 / Operator X
1. Consulting our Geomechanics team to investigate wellbore
stability issues.
2. Acquiring OH logs, and Imaging tools for fracture analysis and
correct cement calculations.
3. Centralizers are recommended in deviated wells for a good
cement job.
Recommendations
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26. Well B14 / Operator X
Thank you
Any questions?
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