T2WELL/ECO2N problem with mass rate
Dear TOUGH2 community users,
I am new to T2Well and I am trying to simulate pure gas-CO2 injection with several radial wellbore cells and only one big reservoir cell, but I am really struggling with trying to increase the mass rate. In the file attached, the model is for half a year and the mass rate is 53.78 kg/s. If I decrease the mass rate to, for example, 10 kg/s (which is really small), the model runs, but around 300s, it stops. What am I doing wrong? Thank you!
My suspicion is that due to pressurization, CO2 temperature goes up in the wellbore. If you have formation around the wellbore, the heat will dissipate However, you do not. So the temperature increases to the point ECO2N module can handle and then stops. You can, however, add the semi-analytical solution (by setting MOP(15)=5, and see TOUGH3 User's Guide for how to set it up), but I am not sure if it is implemented here. Or you add some rock around it to see if that helps.