Formation Pressure from Kick Analysis

Once you shut in the well in and obtain shut in drill pipe pressure, you can estimate formation pressure by applying the hydrostatic pressure concept.

This following equation demonstrates you how to figure out formation pressure from the kick analysis.

Formation Pressure = SIDDP + (0.052 x Hole TVD x Current Mud Weight)

Unit of each parameter is listed below:

Formation Pressure in psi

SIDDP (shut in drill pipe pressure) in psi

Hole TVD (true vertical depth) in ft

Current Mud Weight in ppg

For more understanding, please use the following example to determine formation pressure from this following information.

Shut in drill pipe pressure after bumping the float is 550 psi.

Shut in casing pressure is 700 psi.

Current depth of the well is 7,500'MD/6,000'TVD.

Current mud weight in hole is 10.2 ppg.

According to the formation, you will be able to get the formation pressure like this.

Formation Pressure = 550+ (0.052 x 6000 x 10.2)

Formation Pressure = 3732 psi

Please find the Excel sheet > Formation Pressure from Kick Analysis