Kick Tolerance Factor Calculation

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The following formula is the kick tolerance factor.

Kick Tolerance Factor Formula
Where;

Casing shoe TVD in ft

Well depth TVD in ft

Maximum Allowable MW in ppg

Current MW in ppg

For more understanding, let’s try to calculate the kick tolerance factor (KTF) using the following information:

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Maximum Initial Shut-In Casing Pressure (MISICP)

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Maximum Initial Shut-In Casing Pressure (MISICP) or Maximum allowable shut in casing pressure is the initial shut-in casing pressure that will exceed formation strength at the casing shoe resulting in broken formation at the shoe.

How can we know and calculate the MISICP?

Leak Off Test (LOT) will tell you the maximum pressure which the shoe can withstand before breaking formation at the shoe. The LOT is the combination of surface pressure and hydrostatic pressure therefore you can apply this principle to calculate the MISICP.

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