Two STBs of a Saudi Arabian oil (33 API) are placed in a tank with 1400 SCF of gas (0.68 gravity). The tanks temperature is then raised to 195 F. You then start increasing the tanks pressure by injecting mercury into it.

a) at what pressure will all the gas disappear?

b) what will the oil volume be at that pressure?

c) What will the oil volume be if you raise the pressure by 500 psi above the pressure in (a)?

d) If you then inject 560 SCF of a gas (0.75 gravity) into the tank at (c) keeping the pressure constant, will you have any free gas in the tank?