Define saturated and unsaturated hydrocarbons

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Reference no: EM133150581

Reservoir Engineering

Question 1. Fill in the blanks of the hydrocarbon classification shown below,

2441_Hydrocarbon classification.jpg

Question 2. Define saturated and unsaturated hydrocarbons.

Question 3. Fill in the blanks or select the correct choice:
a. Asphaltene is the (heavy/light) fraction of the crude oil that .............. in light alkanes such as pentane, but is ......... in aromatic solvents such as ........ and
...........
b. Asphaltene and resin molecules have (polar/non-polar) molecular structure.
c. Resins (assist/decrease) the solubility of asphaltenes in the crude oil.
d. The term "sour gas" is used for natural gas samples containing significant amount of .............

Question 4. Draw a typical phase diagram of a pure substance and describe it briefly indicating the critical point.

Question 5. Draw a typical phase diagram of a two-component mixture and describe it briefly indicating the critical point.

Question 6. Describe the classification of reservoir fluids based on their phase diagrams (hint: there are five classes). Plot the phase diagram pointing out the initial and final pressure of the reservoir.

Question 7. Explain briefly what an equation of state (EoS) is.

Question 8. Explain what is meant by:
• Solution gas-oil ratio,
• Oil formation volume factor
• Oil Viscosity
Plot the diagram of these three oil properties against pressure.

Question 9. Consider a gas sample with the composition listed in bellow table:

Component	Mole fraction
C1	0.45
C2	0.15
C3	0.07
C4	0.03
C5	0.04
C6	0.06
C7+	0.01
H2S	0.01
CO2	0.02
Total	1

Calculate the:
• MW and specific gravity of this gas sample
• API gravity of this gas sample
• The pseudo-critical pressure and temperature of this gas based on Sutton's (1985) equations.

P_pc = 756.8 - 131.0γg - 3.6 γg²
T_pc = 169.2 + 349.5γg - 74.0 γg²

Question 10. Consider a gas sample with the following composition; calculate the pseudo-critical pressure and temperature of this gas.

Component, i	Mole fraction, yi	Pci (Psi)	Tci (°R)
C1	0.7	673	344
C2	0.18	709	550
C3	0.02	618	666
C4	0.03	551	766
C5	0.04	485	847
C6	0.01	434	915
C7+	0.02	361	1024
Total	1

Question 11.

(a) Define the gas compressibility factor (z-factor).
(b) Determine the gas compressibility factor for the gas in question 9 at 2500 psi 750°R. (Hint: use the chart developed by Standing and Katz (1954)), you can find this chart at the end of this booklet.
(c) Define the gas formation volume factor
(d) Determine the gas formation volume factor for a reservoir gas sample of part (b)

Question 12. Briefly describe the black oil and compositional reservoir simulation approaches and outline their difference.

Attachment:- Reservoir Engineering.rar

Reference no: EM133150581

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