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A leak off test has been carried out just below the casing shoe set at 5 2 0 0 feet. The density of the water

A leak off test has been carried out just below the casing shoe set at 5200 feet. The density of the water-based mud weight used for the test was 12.0 ppg. Leak off test data is given in the below figure.
a. Construct a plot of surface pressure vs. volume of pumped drilling fluids.
b. Determine on the plot the leak-off pressure and the formation break down pressure.
c. Calculate the fracture pressure and the fracture gradient.
d. Calculate the formation breakdown gradient.
e. Calculate the maximum allowable annular surface pressure (MAASP).
\table[[Surface Pressure, psi,Pumped Volume, bbl],[125,0.5],[225,1],[375,1.5],[500,2],[625,2.5],[750,3],[875,3.5],[975,4],[1050,4.5],[1125,5],[1175,5.5]]
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