Help solving a problem - from Drilling Engineering Book

[avalcov78]

Hello everyone
I am trying to work out this problem but I'm at lost - Can someone help me to solve it? I really appreciate the help (trying to learn more and understand it, apologies if it's too basic of a question)

Exercise 1-6:
After setting 13-3/8 inch casing, at 8,500 feet, the casing shoe was drilled out and a casing shoe test was run. Leak-off
pressure was determined to be 1,100 psi. The test was conducted with a mud density of 12.8 ppg in the hole.
Calculate the following:
Pressure @ Shoe = _______ psi
Gradient @ Shoe = _______ psi/ft (Shall the pressure/depth be used or MW*.052 because the answers are very different)
EQMD @ Shoe = _______ ppg

Exercise 1-7:
After running the leak-off test in the previous exercise, drilling proceeded to 11,000 ft during which time the mud
density was increased to 14.4 ppg. Another leak-off test was conducted. The leak-off pressure was 393 psi. Calculate the
following:
Pressure @ Shoe = _______ psi Pressure @ 9,000 ft. = _______ psi
Gradient @ Shoe = _______ psi/ft Gradient @ 9,000 ft. = _______ psi/ft
EQMD @ Shoe = _______ ppg EQMD @ 9,000 ft = _______ ppg
Pressure @ 10,000 ft = _______ psi Pressure @ 11,000 ft. = _______ psi
Gradient @ 10,000 ft. = _______ psi/ft Gradient @ 11,000 ft = _______ psi/ft
EQMD @ 10,000 ft = = _______ ppg EQMD @ 11,000 ft = _______ ppg

Exercise 1-8:
If while drilling at 10,500 ft with a mud density of 14.4 ppg,a leak-off test had been conducted, what would the leak-off
pressure (pump pressure) have been? Assume the formation at the casing shoe began taking fluid when it experienced the
experienced the exact same pressure as in the previous exercise.
Leak-Off pressure = _______ psi
If the formation at the shoe is the weakest point in the borehole at what
depth did the formation take mud during this leak-off test? _______ ft.
(Hint: compare the values of EQMD at each depth calculated.)

[FANARCO]

After setting 13-3/8 inch casing, at 8,500 feet, the casing shoe was drilled out and a casing shoe test was run. Leak-off
pressure was determined to be 1,100 psi. The test was conducted with a mud density of 12.8 ppg in the hole.
Calculate the following:
Pressure @ Shoe = _______ psi
Gradient @ Shoe = _______ psi/ft (Shall the pressure/depth be used or MW*.052 because the answers are very different)
EQMD @ Shoe = _______ ppg


Pressure @ Shoe = _______ psi
1100+(12.8×.052×8500) psi


Gradient @ Shoe = _______ psi/ft (Shall the pressure/depth be used or MW*.052 because the answers are very different)
Should use TVD
G= answer/TVD
Answer/8500



EQMD @ Shoe = _______ ppg

Answer/(8500*.052)