Science
Petroleum Engineering Homework

### Question Description

in the files I included the Homework as well as a solution for the homework, please paraphrase everything in a word document and use excel sheet for the graphs.

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PNGE 332 Spring 2019 HOMEWORK #5 Due 3/29/2019 1. You have a laboratory analysis of a reservoir sample from an oil well producing 41.5°API stock-tank oil at 941 scf/STB. The sample was obtained from the reservoir at 184°F and 3463 psig. The results are given below. (You should use EXCEL and show your work completely for full credit) Pressure (psig) 4800 4300 3800 3300 3200 3100 3000 2900 2854 2500 2200 1900 1600 1300 1000 700 400 100 Oil formation volume gas-oil factor Bo res bbl/STB 1.648 1.657 1.667 1.677 1.68 1.682 1.684 1.687 1.688 1.634 1.591 1.551 1.511 1.473 1.437 1.402 1.365 1.318 Solution gas-oil ratio Rs scf/STB 956 956 956 956 956 956 956 956 956 834 747 661 577 496 415 336 255 152 Gas formation volume factor Bg bbl/set 0.000866 0.000974 0.00109 0.001252 0.001475 0.001795 0.002285 0.003108 0.00476 0.009683 Plot oil formation volume factor and solution gas/oil ratio against pressure. Guess the bubble point pressure. Compare the shapes of your plots with Figures 8-1 and 8-2. Compare the shapes of the B0 graph and the Rs graph. 2. Determine the value of total formation volume factor of the black oil of Problem 1 at 2500 psig. 3. Determine the value of total formation volume factor of the black oil of Problem 1 at 3300 psig. 4. Determine the value of the coefficient of isothermal compressibility of the black oil of Problem 1 at 2500 psig. 5. An oil field with several wells has the following production history. Producing gas-oil ratio is really separator gas-oil ratio; stock-tank gas is vented and not metered. Separator conditions are 30 psig and 120°F. Separator gas specific gravity is 0.888, and stock-tank oil gravity is 36.1 °APL Estimate solution gas-oil ratio at the bubble point. Compare your answer with laboratory results of 318 scf/STB. (You should use EXCEL and show your work completely for full credit) Cumulative oil production, MSTB Producing gas-oil ratio, scf/STB 260 455 761 1,024 1,319 1,699 1,910 2,201 2,400 2,607 2,800 2,959 3,111 3,231 3,360 3,480 3,591 3,676 3,799 3,890 3,992 4,039 4,110 4,205 4,275 4,317 4,390 4,435 4,500 4,540 4,600 310 322 286 305 317 402 434 515 575 610 661 602 723 769 848 911 974 990 1,092 1,044 1,143 1,170 1,318 1,271 1,407 1,485 1,494 1,373 1,467 1,305 1,446 6. The pressure-production history for an oil field is given below. Estimate bubble-point pressure. Compare your answer with laboratory results of 1441 psig. (You should use EXCEL and show your work completely for full credit) Reservoir pressure psi 3,122 2,982 1,830 1,275 965 1,095 933 495 Cumulative oil production MSTB 110 370 1,050 1,400 3,060 3,160 3,360 4,620 7. Calculate formation volume factor of oil for Good Oil Co. No. 4 at 4500 psig. Use optimum separator conditions. 8. Calculate solution gas-oil ratio for Good Oil Co. No. 4 at 4500 psig. Use optimum separator" conditions. 9. Calculate total formation volume factor for Good Oil Co. No. 4 at 4500 psig. Use optimum separator conditions. 10. Determine the viscosity of the oil in the reservoir of Good Oil Co. No. 4 at 4500 psig and 220°F. 11. Calculate a value of coefficient of isothermal compressibility for use at pressures between 4500 psig and 4000 psig at 220°F for Good Oil Co. No. 4. ...
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Attached.

Outline
Questions 1-11

Oil
formatio
n volume
Pressure
gas-oil
(Psig)
factor
(res
bbl/STB)
4800
4300
3800
3300
3200
3100
3000
2900
2854
2500
2200
1900
1600
1300
1000
700
400
100

1.648
1.657
1.677
1.677
1.68
1.682
1.684
1.687
1.688
1.634
1.591
1.551
1.511
1.473
1.437
1.402
1.365
1.318

Oil formation volume gas
(res bbl/STB)
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0

1000

2000

3000

volume gas-oil factor
es bbl/STB)

4000

5000

6000

Pressure
(Psig)
4800
4300
3800
3300
3200
3100
3000
2900
2854
2500
2200
1900
1600
1300
1000
700
400
100

Solution
gas-oil
ratio
(sfc/STB
)
956
956
956
956
956
956
956
956
956
834
747
661
577
486
415
336
255
152

Solution gas
1200
1000
800
600
400
200
0
0

1000

Solution gas-oil ra...

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