Formation Integrity Test (FIT)
Formation Integrity Test (FIT) is the method to test strength of formation and a casing shoe by increasing Bottom Hole Pressure (BHP) to designed pressure. FIT is normally conducted to ensure that formation below the casing show will not be broken while drilling the next section with higher bottom hole pressure. Normally, drilling engineers in town will design how much formation integrity test pressure required and a unit of FIT is normally in pound per gallon unit.
How to Calculate Pressure Required for Formation Integrity Test.
Before forming formation integrity test, you should know pressure required for Formation Integrity Test. …