Estimate Type of Influx (kick)

From the previous topic, estimate Height of Influx, you can use influx height to estimate type of influx.

The following equation is used for estimating type of influx:

Note: You can prove the equation by using the U-tube concept.


Influx weight in ppg

Current mud weight in ppg

SICP stands for Shut In Casing Pressure in psi.

SIDPP stands for Shut In Drill Pipe Pressure in psi.

Influx height in ft

Once you know weight of influx, you can compare with these figures below to determine type of influx.

1 – 3 ppg most likely gas influx.

3 – 7 ppg most likely oil kick or combination between gas and oil kick

7 – 9 ppg most likely water influx

With these given information, please determine type of influx.

Shut in casing pressure = 1050 psi

Shut in drill pipe pressure = 750 psi

Height of influx = 450 ft

Current Mud Weight = 14.0 ppg


Influx weight = 1.2 ppg

According to the criteria above, the influx is most likely gas kick.

Ref book: Drilling Formula Book Formulas and Calculations for Drilling, Production and Workover, Second Edition

Related Post

Well Control Tracking Sheet I just create the well control tracking sheet (well control time log) that you can use it to record what actually happen while performing well control...
Estimated mud weight required to safely drill the ... I have an interesting question to share with you about how to estimate minimum mud weight required to safely TD the well. The question is shown bel...
Mixing Fluids of Different Densities with Pit Spac... You many have different drilling fluid densities in your mud pits so you can have option to mix different fluid densities together in order to get you...
Shut in Procedures and Their Importance Shut in Well Procedures The shut in procedure must be developed and practiced for every rig activity such as: • Shut in while drilling • Shut i...
Share the joy
Tagged , . Bookmark the permalink.

About DrillingFormulas.Com

Working in the oil field and loving to share knowledge.

2 Responses to Estimate Type of Influx (kick)

  1. Okechukwu Nnaemeka says:

    I have equip myself to an extent in my career in oil and gas industry. Also,I hope to get more informations on formulars and equations to enable me trobleshoot accurately.

  2. teguh says:

    Nice equation, simple equation is able to predict and estimate the influx type downhole.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.