Formation pressure (FP) with the well shut-in on a kick

• Example: Determine the formation pressure using the following data:

  • Shut-in drill pipe pressure = 500 psi

  • Mud weight in drill pipe = 9.6 ppg

  • True vertical depth = 10,000 ft

  • FP, psi = 500 psi + (9.6 ppg 0.052 10,000 ft)

  • FP, psi = 500 psi + 4992 psi

  • FP = 5492 psi

Bottomhole pressure (BHP) with the well shut-in on a kick

• Example: Determine the bottomhole pressure (BHP) with the well shut-in on a kick:

  • Shut-in drill pipe pressure = 500 psi

  • Mud weight in drill pipe = 9.6 ppg

  • True vertical depth = 10,000 ft

  • BHP, psi = 500 psi + (9.6 ppg 0.052 10,000 ft)

  • BHP, psi = 500 psi + 4992 psi

  • BHP = 5492 psi

Shut-in drill pipe pressure (SIDPP)

• Example: Determine the shut-in drill pipe pressure using the following data:

  • Formation pressure = 12,480 psi

  • Mud weight in drill pipe = 15.0 ppg

  • True vertical depth = 15,000 ft

  • SIDPP, psi = 12,480 psi ? (15.0 ppg 0.052 15,000 ft)

  • SIDPP, psi = 12,480 psi ? 11,700 psi

  • SIDPP = 780 psi

Shut-in casing pressure (SICP)

• Example: Determine the shut-in casing pressure using the following data:

  • Formation pressure = 12,480 psi

  • Mud weight in annulus = 15.0 ppg

  • Feet of mud in annulus = 14,600 ft

  • Influx gradient = 0.12 psi/ft

  • Feet of influx in annulus = 400 ft

  • SICP,...