1. Petroleum Engineering 406
Lesson 5
Well Control

2. Read
Well Control Manual
Chapter 9
Homework 3
Due Feb. 10, 1999

3. Content Casing Seat Selection Land and shallow water Conventional
Based on X ppg kick
Based on X ppg kick and X bbl gain

4. Content
Casing Seat Selection
Deep Water

5. Content
Casing Seat Selection
Riserless

6. Land and shallow water Plot Pore Pressure and Fracture Gradient curves
Pore pressure from Eaton
Resistivity log
FP=OB-(OB-FPn)*(Cn/Co)^1.2
Conductivity
FP=OB-(OB-FPn)*(Ro/Rn)^1.2
Sonic
FP=OB-(OB-FPn)*(DTn/DTo)^3

7. Pore pressure from Eaton
dc exponent
FP=OB-(OB-FPn)*(dc calculated/dc normal)^1.2
FP = formation pressure,ppg
OB = overburden stress, ppg
FPn = Normal formation pressure, ppg

8. Pore pressure from Eaton
Ro = Shale resistivity from the well log, ohm-meters
Rn = Shale resistivity from normal trend
Co = Shale conductivity from the well log
Cn = Shale conductivity from the normal line
DTo = Shale travel time from the well log
DTn = Shale travel time from the normal line
dc = Corrected d exponent

9. Fracture Pressure from Eaton
FG=(OB-FP)*[Poisson’s ratio/(1-Poisson’s ratio)]+FP

10. Casing Seat Selection - Conventional

11. Casing seat selection Standard 0.5 ppg kick 200’ tall Pore Pressure
Fracture Pressure

12. Data

13. Deep Water Fracture Pressure
Eaton’s Gulf Coast Overburden Gradient

14. Deep Water Fracture Pressure

15. Deep Water Fracture Pressure

16. Deep Water Fracture Pressure

17. OB Gradient below ML

18. Deep Water Fracture Pressure

19. Deep Water Casing Seat

20. Deep Water Casing Seat

21. Riserless Casing Seats