Remembering the formula for liquid compressibility. IfI
have a tank of oil of volume 1 ft³ at 60 F and 3500 psia,
with compressibility of 6 X 10-5(1/psi). and we assume oil
compressibility is constant, and that the tank volume and
temperature are constant, how much oil (volume) would
have to be removed to drop the pressure to 2000 psia?
As a % of the initial volume
Plot V removed VS P from 2000 down to 500 psia.
We have a mixture of 20% acetone, 40% benzene and 40%
(If you use the spreadsheet make sure you have the right
component names in the right cells and that the flash
temperature is 35 C that doesn't automatically happen.. !!)
At 35 C, calculate the
a) Bubble point pressure
b) Bubble point vapor composition
Dew point pressure
d) Dew point liquid composition
Bubble point temperature (at 1 atm)
Dew point temperature (at 1 atm)
For a flash at 35 C and .19 atm
a) the vapor fraction (V)
For the flash the vapor composition
For the flash, the liquid composition
Field have observed the following field
Stock tank gravity
Separator GOR (R_..)
Stock Tank GOR(R.
at feed separator)
Reservoir Pore Volume
20% (so oil occupies
80% pore volume)
Calculate (using Excel of
Bubble Point Pressure
all liquid reservoir initially ? Gis P: Pb)
s)What (initial oil formation volume factor)
original oil place (look units of
What Boi at the bubble point?
What place the bubble point?
How much oil produced to get down
the bubble point?
pressure drops 300 psi below the bubble
point, what Rsb?
14) What (use Rs from 10 and P = #3. 300)
We have acquired a gas field which was initially at 3500
psia. The pressure now is 2000 psia and 60 MMSCF of gas
has been produced.
Determine: (assume ideal gas law applies)
a) Plot (excel) P vs Gp all the way to P = 0
b) Determine original gas in place (IGIP)
c) At what pressure will 60% of remaining gas have been
d) What are the remaining reserves (gas left in field) if
abandonment pressure is 200 psia (that's when we
stop producing whats left after 200 psia is "lost")
e) Plot P/Z vs Gp using the Z function on Excel
f) Using the plot from "e" what is IGIP
These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction
of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice.
Unethical use is strictly forbidden.