Table 2 Number of component molecules in hydrocarbon gases.

From: Molecular insights into the effect of hydrocarbon gas composition characteristics on tight oil migration

Hydrocarbon gases combination

Methane

Ethane

Propane

Total number

Number of molecules

732

0

0

732

684

20

14

718

660

44

30

734

614

70

48

732

562

100

68

730

506

134

92

732

Molecular weight (MW)

16

30

44

 

Total MW

11,712

0

0

11,712

10,944

600

616

12,160

10,560

1320

1320

13,200

9824

2100

2112

14,036

8992

3000

2992

14,984

8096

4020

4048

16,164

Mass (%)

100.00

0.00

0.00

100.00%

90.00

4.93

5.07

100.00%

80.00

10.00

10.00

100.00%

69.99

14.96

15.05

100.00%

60.01

20.02

19.97

100.00%

50.09

24.87

25.04

100.00%