Data: Ocean floor 1.3km below surface, density of seawater 1030kh/m^3, density o
ID: 2223433 • Letter: D
Question
Data: Ocean floor 1.3km below surface, density of seawater 1030kh/m^3, density of oil 720kg/m^3, density of heavyweight drilling mud 1900kg/m^3, overpressure at the capped well-head 6500psi, well pipe diameter 0.5m, one barrel is equivalent to 159 liters.
Questions:
a) Calculate the absolute pressure of saltwater at the ocean floor.
b) What is the absolute pressure at the capped well-head?
c) Calculate the length of the column of mud that must displace the column of oil to give a pressure equal to that of the saltwater pressure at the ocean floor.
d) How many barrels of mud were pumped down the well to produce this equilibrium condition?
Explanation / Answer
a) Patm + 1030 x 9.8 x 1300 = 101325 + 13122200 =13223525 Pa =130.5 atm b) 6500 pounds per square inch = 44815922.4 pascals Pabs = Patm + 44815922.4 pascals = 44917247.4 Pa
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