Formation Pressure Measurement
Konul Alizada - Geologist

0. 10. 20. 30.
0.
500.
1500.
Time (hours)
rates
STB/D
0. 10. 20. 30.
4000.
4500.
5000.
5500.
6000.
pressure
PSI
102/01/01-1200 : N/A
(2000 STB/D, 24 hrs)
(5500 psi)

0. 10. 20. 30. 40.
0.
400.
800.
Time (hours)
rates
STB/D
0. 10. 20. 30. 40.
5000.
5400.
5800.
pressure
PSI
102/01/02-0000 : N/A
(1000 STB/D, 24 hrs) (shut in for 24 hrs)
(5800 psi)

Formation pressure
nearly equals
sandface pressure
Kmc << Kf
Ps Sandface Pressure
Large pressure drop through mudcake
Pmh
• Permeable zones: low supercharge
Pf  Ps
SUPERCHARGE EFFECT

• Tight zones: high supercharge
Formation pressure
much lower than
sandface pressure
Pf << Ps
Small pressure drop through mudcake
Pmh
Kmc  Kf
SUPERCHARGE EFFECT
SUPERCHARGE EFFECT

Fluid Identification (FLID) Section
Density Resistivity Capacitance
Pressure
Fluid Temp
3 ft
• Compact 3-ft long modular design
• Optimized for flexible tool string configuration
• Collocation of sensors in flow line

Examples

29