Oleh Weres Posted July 27, 2015 Share Posted July 27, 2015 Modeling a geothermal brine. CO2 in solution changes hugely when steam is separated. Calculated fugacity of CO2 using another program, entered fco2 value into React. Resulting output file is attached, mt43_03.txt, with the corresponding .rea file copied into it between the lines of **********. Took calculated concentration of CO2 in solution (including HCO3-) as reported in "Original basis - HCO3- " and "Elemental composition - Carbon" and replaced fco2 with that amount of CO2(aq). (Bicarbonate not specified as a separate species; pH is controlled by specifying OH- which represents total alkalinity of the brine.) This calculation gave a much higher pH value, even through Original basis and Elemental composition values are the same. Attached file is mt43_03c.txt Only red flag I see is a negative value for "Original basis - H+" in the latter calculation. This looks like a NASTY error in React. Is there a patch or easy work-around ? I have had similar problems using specifying values of fugacity of H2S. mt43_03.txt mt43_03c.txt Quote Link to comment Share on other sites More sharing options...
Oleh Weres Posted July 27, 2015 Author Share Posted July 27, 2015 Forgot to mention: Using GWB Standard 9.0.9 build 6116 64-bit. Sorry 'bout that ! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.