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EOS2 CO2 Injection Enthalpy

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I've been trying to model injection of CO2 into a shale layer and I'm not sure what enthalpy to input for the CO2 - I know what pressure and temperature I'd like it to be, but without a reference enthalpy state for CO2 I'm not sure what to do. There is an excel spreadsheet available for water injections which outputs enthalpy, but I could not find one for CO2.

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There are a number of online calculators for CO2. However, you may want to take a look at a posting on this forum as well, titled "CO2 Enthalpy using ECO2N" and posted in July of 2008. It gives a tip on how to set the temperature of CO2 coming out of an injection cell.



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