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Re: Input file
Madjid, 1 - I'm almost certain you cannot assume it's reached steady state. If you assign a time to reach, even if your simulation reaches "steady state" by the definition given in the TOUGH2 source…
- Mikey_Hannon
- 7 yrs ago
- TOUGH2
- Reported - view
MOMOP vs. SELEC block settings for phase transitions in ECO2M

I see that MOMOP(29) allows us to define how we would like to perform phase transitions ("hairtrigger" vs. "finite window"), but the ECO2M module also allows us to set that in the SELEC block.…
- Mikey_Hannon
- 7 yrs ago
- 1reply
- 441
- iTOUGH2
Re: Can anybody explain the meaning of DELV in GENER?
I apologize for my delayed response. There's actually an example problem in the TOUGH2 short course that is similar to this. In essence, you have to split this up into 2 parts.…
- Mikey_Hannon
- 7 yrs ago
- TOUGH2
- Reported - view
Numerical instability with water vapor condensation in ECO2M

Hey everyone, I've run into an issue trying to make the transition from a saturated gas to a 2-phase stream composed of a wetting aqueous phase and a gaseous CO2/H2O(g) mixture.…
- Mikey_Hannon
- 7 yrs ago
- 275
- TOUGH2
Re: Can anybody explain the meaning of DELV in GENER?
I'm afraid I don't fully understand what you were attempting based on your description. Could you explain the rest of your initial/boundary conditions?
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Can anybody explain the meaning of DELV in GENER?
Sawyer, The DELV option essentially ties the production rate to the bottom-hole pressure. GX is your Productivity Index (PI). Equation 28 in the TOUGH2 User's Manual specifies how the flow rate of…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Pressure vs CO2 DG
Luis, Sorry about the delay. I'm not entirely sure about why this isn't noted in gas density, but I would expect there to be early fluctuations in pressure due from having to overcome the capillary…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Calculating Total Density from TOUGH2/ECO2M Output file
Suhendi, Depending on how permeable your boundaries are, your conclusion about fluid loss from the domain (particularly through the lateral boundary) is entirely plausible.…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Pressure vs CO2 DG
Luis, Before I attempt to answer your question, there are a few pieces of information I need to know: Where exactly in the reservoir (i.e., distance from the well) are these plots based upon?…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Calculating Total Density from TOUGH2/ECO2M Output file
Suhendi, That looks right to me. When you say "salt mass fraction=0", are you referring to the absence of solid salt or the absence of any salt (i.e., solid and dissolved in aqueous phase)? Thanks!…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Input file
According to Table 9 of the TOUGH2 User's Manual, the second primary variable is a listing of air mass fraction for single phase or of gas saturation + 10 for two phase. So what 0.…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Parameter estimates from multiple simulations?
That's good to know in the future, but I'm afraid I may have overgeneralized my original question. Essentially what I was trying to do is to make minor modifications to the MESH between multiple…
- Mikey_Hannon
- 8 yrs ago
- iTOUGH2
- Reported - view
Re: Parameter estimates from multiple simulations?
Hold on... I just came across the RESTART TIME command. I think this may be what I was looking for.
- Mikey_Hannon
- 8 yrs ago
- iTOUGH2
- Reported - view
Re: Parameter estimates from multiple simulations?
Thanks Stefan! Is there any way to go about the first approach if I need to assign the values at the end of the simulation of my first "model" as the initial conditions for the simulation of my…
- Mikey_Hannon
- 8 yrs ago
- iTOUGH2
- Reported - view
Parameter estimates from multiple simulations?

Is it possible, through TOUGH2 or iTOUGH2, to perform parameter estimations based on multiple simulations that are coupled to one another? I know that for a forward simulation you can establish…
- Mikey_Hannon
- 8 yrs ago
- 5replies
- 662
- iTOUGH2
Re: Inactive elements
Stefan, What you say makes sense. The only issue I'll have is that, by following your procedure (1-6) in the lab, the observed Q_A will be characteristically different than the modeled Q_A required…
- Mikey_Hannon
- 8 yrs ago
- iTOUGH2
- Reported - view
Re: Inactive elements
Thanks Stefan! Ideally what I'm trying to set up is a constant pressure held in a reservoir (call it A) that is emptying through a porous, permeable barrier into another confined porous space (call…
- Mikey_Hannon
- 8 yrs ago
- iTOUGH2
- Reported - view
Inactive elements

Can iTOUGH2 attempt to estimate a generation rate from an inactive element? This element would define either a Dirichlet or a time-dependent boundary. I'll also have observations on the flow rate…
- Mikey_Hannon
- 8 yrs ago
- 5replies
- 770
- iTOUGH2
Re: Input file
It's obviously impossible for me to tell you exactly what's going on, given the size of the file, but here are a few observations: Element A1166 is indeed missing from ELEME block,…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: Input file
I don't believe you can have elements listed in the CONNE block if they aren't in the ELEME block. Have you tried running a simulation with the input file? Also,…
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
Re: ELEME6 Block?
Thanks for getting back to me about this, Stefan! I've attached the example input (fimesh) and mesh files (fimesh.mes) that I received from this example. I am indeed running iTOUGH2 (v6.4) for this.…
Attachments
- Mikey_Hannon
- 8 yrs ago
- TOUGH2
- Reported - view
ELEME6 Block?

Hey everyone, I used MESHMaker to create an axisymmetric mesh (RZ2D), and it created an ELEME block with 6-digit character codes (titled ELEME6). Is this due to the number of elements I requested?…
- Mikey_Hannon
- 8 yrs ago
- 2replies
- 537
- TOUGH2

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