- PRSV+WS(NRTL) Single P-T-x Calculation -

- PRSV+WS(NRTL) Multiple P-T-x Calculation -

- Input P Range at a Fixed T -

- Input T Range at a Fixed P -

Select a System

Input Mole Fraction for the CO2-H2O System

Initial guess of vapor phase mole fraction (fng)

Input Mole Fraction for the CH4-H2O System

Initial guess of vapor phase mole fraction (fng)

Input Mole Fraction for the CO2-CH4-H2O System

Initial guess of vapor phase mole fraction (fng)

Select Properties to Display

Calculation Results

- CO2-Brine Single P-T-x Calculation -

- CO2-Brine Multiple P-T-x Calculation -

- Input P Range at a Fixed T -

- Input T Range at a Fixed P -

Input Reservoir Brine Concentration by

Salts Concentration Units

Specify Concentration by Salt Species

Total Disolved Solids (TDS) Units:

Specify TDS

Ions Concentration Units:

Specify Concentration by Ion Species

Select Properties to Display

ρ(g)

Calculation Results

References

Zhao, H. and Lvov, S. N. Phase behavior of the CO2–H2O system at temperatures of 273–623 K and pressures of 0.1–200 MPa using Peng-Robinson-Stryjek-Vera equation of state with a modified Wong-Sandler mixing rule: An extension to the CO2–CH4–H2O system, Fluid Phase Equilibria, 2016, 417, 96-108. DOI
Zhao, H. Flash Calculation and Phase Stability Analysis of Reservoir Gas-Water System—Implication for Extracting Dissolved CH4 by CO2 Injection. SPE Annual Technical Conference and Exhibition, Dubai, UAE, 26–28 September 2016. DOI

Disclaimer

PSUCO2 model is developed based on a large amount of experimental vapor-liquid-equilibrium (VLE) data for the CO2-brine system (Zhao et al. 2015a, 2015b, 2015c). Within the model specified pressure and temperature range (0.1-200 MPa and 0-300oC), the absolute average deviation of the calculated VLE results for CO2-Brine system is less than 7% when compared to the corresponding experimental data. The accuracy of the PSUCO2 model does not necessarily garanttee the use of the data from PSUCO2 is always reliable in any scientific research or commercial products.

References

H. Zhao, M. Fedkin, R. Dilmore, and S. N. Lvov, Carbon dioxide solubility in aqueous solutions of sodium chloride at geological conditions: Experimental results at 323.15, 373.15, 423.15K and 150 bar and modeling up to 573.15K and 2000 bar, Geochimica et Cosmochimica Acta, 2015a, 149, 165-189. DOI
H. Zhao, R. Dilmore, and S. N. Lvov, Experimental studies and modeling of CO2 solubility in high temperature aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions, AIChE Journal, 2015b, 61, 2286-2297. DOI
H. Zhao, R. Dilmore, D. E. Allen, S. W. Hedges, Y. Soong, and S. N. Lvov, Measurement and modeling of CO2 solubility in natural and synthetic formation brines for CO2 sequestration, Environmental Science & Technology, 2015c, 49, 1972-1980. DOI