[Unable to Speciate a Water Sample at Reservoir Conditions]

Hello Jia,

I followed your suggestions and that solved the problem.

Thank you for your help, I appreciate it!

All the Best,

   Bob

 

 

[Unable to Speciate a Water Sample at Reservoir Conditions]

Hi Jia,

Here is the file with the mixed water sample that I am trying to speciate.

Thanks,

   Bob

GSS_Mix.sp8

[Unable to Speciate a Water Sample at Reservoir Conditions]

I would appreciate any guidance on the this.  

1.  I have mixed two different waters (1/1) under atmospheric conditions; the first is highly saline and the second is less saline.  
2.  I would then like to speciate the mixed water (above) under reservoir conditions - pressure of 3500kPa. Methane comprises more than 97% of the gas phase in the reservoir.
3.  When I add CH4 under "Basis" at 3.5MPa (3500kPa), and run the speciation program, the program informs that O2 (aq) needs to be constrained in the basis entry for fluid "initial".
4.   When I add 0.001 mg/L O2(aq), the program fails to converge after 999 iterations.
5.   Any thoughts on what needs to be done to get the program to converge?

Thanks, 

  Bob

GSS_Mix.sp8GSS_Mix.sp8