Chapter 9 Flashcards
1
Q
Types of drive mechanisms
A
Water Drive
Solution Gas Drive
Gas Cap Drive
Gravity Drainage
2
Q
Water Drive
A
Energy comes from expansion of water or water drive may be a result of artesian flow from an outcrop.
Pressure - Remains high G/O Ratio - Steady Water Production - Increased Well Behaviour - Flow until water pro gets excessive Highest oil recovery.
3
Q
Solution Gas Drive
A
Pressure drop forcing gas out of oil. Resulting gas expansion forces oil out.
Pressure - Declines rapidly
G/O Ratio - Rises to max then drops
Pro Rate - Initially high then drops
Water Pro - None
Well behaviour - requires artificial lift
4
Q
Gas Cap Drive
A
Oil that has came out of solution has segrgreted and formed a gas cap.
RP - Falls slowly G/O Ratio - Rises continuously PR- First high then declines WP- Absent WB-long life depending on size
5
Q
Gravity Drainage
A
Slow process where the natural density of different fluids is responsible for moving.
6
Q
Secondary Recovery
A
Water injection and gas injection
7
Q
Tertiary Recovery
A
Thermal or Solvent Steam CO Miscible Gas Chemical
