ACTCO2S
Recognised by the OPM Flow parserPROPS
The keyword ACTCO2S specifies the activity model for salting-out effects when calculating mutual solubility in the CO2 storage module which is activated by the CO2STORE keyword in the RUNSPEC section.
Notes:
The keyword is terminated by a “/”.
- Records
- Fixed number of records
- Record count
- 1
- Items per record
- 1
Parameters
| No. | Name | Description | Type | Default |
|---|---|---|---|---|
| 1 | ACTIVITY_manual: ACTMODEL | A positive integer value selecting the activity model for the salting-out effect. The choices are: The Rumpf et al.1 Rumpf, B.,Nicolaisen, H., Ocal, C., and Maurer, G., 1994. Solubility of carbon dioxide in aqueous solutions of sodium chloride: experimental results and correlation. J. Sol. Chem. 23, 431-448. model as detailed in the paper by Spycher and Pruess2 Spycher, N., and Pruess, K., 2005. CO2-H2O mixtures in the geological sequestration of CO2. II. Partitioning in chloride brines at 12–100 °C and up to 600 bar. Geochimica Et Cosmochimica Acta 69, 3309–3320.. The model was calibrated in the P-T range 5 to 96 bar and 40 to 160 °C, and was shown in Spycher and Pruess2 to be accurate in the P-T range 1 to 600 bar and 12 to 100 °C. Note that this model requires a (fixed-point) iteration procedure to compute solubility, but usually converges within few iterations. Rumpf, B.,Nicolaisen, H., Ocal, C., and Maurer, G., 1994. Solubility of carbon dioxide in aqueous solutions of sodium chloride: experimental results and correlation. J. Sol. Chem. 23, 431-448. Spycher, N., and Pruess, K., 2005. CO2-H2O mixtures in the geological sequestration of CO2. II. Partitioning in chloride brines at 12–100 °C and up to 600 bar. Geochimica Et Cosmochimica Acta 69, 3309–3320. The Duan and Sun3 Duan Z., and Sun R., 2003. An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 257 to 533 K and from 0 to 2000 bar. Chem. Geol. 193, 257–271. model as detailed in the paper by Spycher and Pruess4 Spycher, N., and Pruess, K., 2009. A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems. Transp Porous Med 82, 173–196.. The model was recalibrated to the P-T range 1 to 600 bar and 12 to 300 °C, and was shown to be accurate within the same range. Note that above 99 °C a (fixed-point) iteration procedure is required to compute solubility, while below 99 °C the computations are done in a direct manner without needing iterations. Duan Z., and Sun R., 2003. An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 257 to 533 K and from 0 to 2000 bar. Chem. Geol. 193, 257–271. Spycher, N., and Pruess, K., 2009. A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems. Transp Porous Med 82, 173–196. The Duan and Sun3 model as detailed in the paper by Spycher and Pruess2. The model was calibrated to the P-T range 0 to 2000 bar and 0 to 260 °C, and was shown in Spycher and Pruess2 to be accurate in the P-T range 1 to 600 bar and 12 to 100 °C. Note that no iterations are required to compute the solubility. | INT | 3 |
Example
The following example activates activity model number 1.
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-- ACTIVITY MODEL FOR SALTING-OUT EFFECTS IN CO2
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ACTCO2S
1 /Manual source: parts/chapters/subsections/8.3/ACTCO2S.fodt