ECO2N, Model initial temperature distribution
Dear all members,
I'm working on thermal injection simulation in TOUGH2 and I want to define an initial temperature distribution for my model. After program execution (ECO2N), the pressure distribution is correct but the temperature distribution remains constant. I could not find out the reason. I have attached the input and output files that I tried and I would be grateful if someone can help me on this issue and let me know why this is occurring and how should I modify the input.
Your temperatures actually did change from the initially specified values (which are slightly different for UPPBC and BASBC). Since you did not specify a constant pressure or temperature boundary anywhere, the temperature throughout the domain becomes uniform at steady state - as expected. I don't know how your domain looks like and what boundary conditions you want (I suppose you wanted to create some geothermal gradient). For elements with prescribed temperature (I presume those belonging to materials UPPBC and BASBC, even though they seem to have variable elevations), set the rock grain density DROK to a very large value (e.g., 1E50) to keep the temperature constant.
Hope this helps,
There is no generally "correct way" to define your system - it depends on how your actual reservoir looks like! I don't know how you specified the hydraulic boundary conditions now, i.e., whether you have no-flow boundaries all around, or a prescribed pressure at the top, or at the top and the bottom. Again, any of these configurations may be appropriate. If you have no-flow boundaries all around, the mean pressure may not be what you want, and you may run into problems once you start injecting or producing from the finite reservoir. If you specify the pressure at both the top and bottom boundaries, you may get a flux across the system, which may (or may not!) be what you want. I suggest checking this.