Table 1 CO2 gas parameters table.

From: Analysis of the impact of CO2 injection on fracturing fluid flowback in shale gas wells

Parameter

Value

Unit

Notes

Pressure (Standard)

0.101325

MPa

Standard atmospheric pressure (≈1 atm)

Temperature (Standard)

15.55556

°C

Equivalent to 60°F (standard temperature)

Molar fraction

100

%

Only CO2 in the mixture; other components (water, methane, etc.) set to 0

Molecular weight

42.46928

g/mol

Theoretical value: 44.01 g/mol; discrepancy may arise from model assumptions

Density (Mass)

1.869064

kg/m3

Calculated under standard conditions (theoretical ≈1.977 kg/m3)

Dynamic viscosity

44.0098

μPa s

Gas-phase dynamic viscosity