`THCO2MIX`

Recognised by the OPM Flow parserPROPS

The THCO2MIX keyword specifies the thermal mixing models for salt in the water phase, CO2 in the liquid phase and vaporized water in gas phase.

This is an OPM Flow specific keyword that should only be used if the CO2STORE keyword has been specified in the RUNSPEC section.

Notes:

The keyword is terminated by a “/”.

Records: Fixed number of records
Record count: 1
Items per record: 3

Parameters

No.	Name	Description	Type	Default
1	`MIXING_MODEL_SALT` manual: `SALTMOD`	A defined character string that specifies the thermal mixing model for salt in the liquid phase, and should be set to one of the following: NONE: pure water enthalpy will be used, or MICHAELIDES: account for salt concentration according to Michaelides1 Michaelides, E. E., “Thermodynamic Properties of Geothermal Fluids”, Geothermal Resources Council, Trans. Vol. 5 (361-364), October 1981., 1981. Michaelides, E. E., “Thermodynamic Properties of Geothermal Fluids”, Geothermal Resources Council, Trans. Vol. 5 (361-364), October 1981.	STRING	MICHAELIDES
2	`MIXING_MODEL_LIQUID` manual: `LIQMOD`	A defined character string that specifies the thermal mixing model for CO2 in the liquid phase, and should be set to one of the following: NONE: do not account for CO2 in brine, IDEAL: account for CO2 assuming an ideal mixture (based on mass fractions), or DUANSUN: also add the heat of dissolution for CO2 according to Dun and Sun2 Duan, Zhenhao, and Rui Sun. "An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 273 to 533 K and from 0 to 2000 bar." Chemical geology 193.3-4 (2003): 257-271., 2003 (Fig. 6). Duan, Zhenhao, and Rui Sun. "An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 273 to 533 K and from 0 to 2000 bar." Chemical geology 193.3-4 (2003): 257-271. `NONEIDEALDUANSUN`	STRING	DUANSUN
3	`MIXING_MODEL_GAS` manual: `GASMOD`	A defined character string that specifies the thermal mixing model for vaporized water in the gas phase, and should be set to one of the following: NONE: pure CO2 enthalpy will be used, or IDEAL: account for vaporized water assuming an ideal mixture (based on mass fractions). `NONEIDEAL`	STRING	NONE

Example

The following example specifies the default thermal mixing models for salt in the liquid phase, CO2 in the liquid phase, and vaporized water in the gas phase.
--
-- SPECIFY THERMAL MIXING MODELS
--
-- SALT LIQUID GAS
-- -------- -------- --------
THCO2MIX
MICHAELIDES DUANSUN NONE /

Manual source: parts/chapters/subsections/8.3/THCO2MIX.fodt