Alfredo Battistelli's Profile - TOUGH User Community

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Re: Assistance Needed with Methane Volume Quantification in EOS7C Model
Jordon, I'm not a specialist in EOS7CA, but: - Sat_G should be the gas saturation of the gas phase, which includes methane, air and water vapor. - the concentration of methane in both gas and aqueous…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH3
- Reported - view
Re: The results of Example 2 in the ECO2M manual
Dear Kohei, a residual water saturation of 0.3 means the aqueous phase cannot be displaced by the injected CO2 below that saturation value, as AQ phase relative permeability is 0.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Commingled injection well modeling
@liu qi 1) it's not possible to say why you experience a slow convergence. It may be due to many different reasons. You have to look at the output, identify which is the element and the equation…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH3
- Reported - view
Re: Commingled injection well modeling
I think it is definetely possible, as it has already been done. An example is given by Giorgis et al., Energy Conversion and Management 48 (2007) 1816–1826.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH3
- Reported - view
Re: Problem of wellbore coupling with reservoir in T2WELL
The wellbore node in a wellbore-reservoir connection shall be located at the wellbore - reservoir interface. Then, the flow along the connection is simply computed using Darcy's law from the wellbore…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: T2Well-ECO2N
@Muhammad I do not have a specific experience in modeling CO2 leakages along wellbores. There is an extensive literature on the subject that can be searched to identify the best approach to be…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Flow out of the base of a hillslope
@Jordon Massey I tried to implement the main features of your conceptual model into the numerical one, but you should of course use your own model specifications (petrophysical properties,…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- 1
- TOUGH2
- Reported - view
Re: T2Well-ECO2N
@liu qi You should use T2Well when a coupled modeling of wellbore and reservoir flow is necessary. This might be the case when you are interested in transients occurring because of changes in…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Flow out of the base of a hillslope
@Jordon Massey Thanks for the clear conceptual model sketch. I have to update PetraSim from V. 2022.3.1003 to the latest 2023 version. So I rebuilt the model using EOS3.…
Attachment
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Flow out of the base of a hillslope
Jordon, May be I missed something about the conceptual model on which your numerical model is based. A graphical sketch of the conceptual model would likely clarify what you intend to model.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Flow out of the base of a hillslope
Increasing the volume of a boundary elements by 50 times is not enough if you want constant boundary conditions. You should use something in the order of 1.E+30 or more.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: How can the relationships between permeability (k/k0) and porosity (Φ/Φ0 ) in the fault be changed?
@xusheng chen As you posted under TOUGH2 I assume you are using TOUGH2-ECO2N. k vs phi model is assigned using IE(11) and model parameters are given with FE(1) and FE(2),…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: How to set up semi-analytical method to calculate heat transfer in t2well?
@happy12688 Wellbore heat transfer can be computed either numerically or analytically (Ramey's equation) in T2Well. Looking at T2Well-ECO2N (2011) user's guide:…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: How can the relationships between permeability (k/k0) and porosity (Φ/Φ0 ) in the fault be changed?
In TOUGH2-ECO2N, as in EWASG, parameters for k/ko vs phi/phio are given under block SELEC and are used for all the rock domains specified under block ROCKS. The same seems to be done in TOUGH3.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: How many VOCs can be included in a TMVOC simulation?
The number of components in TMVOC is NK=1+NHC+NCG, where NHC is the number of VOC, NCG the number of gases (inorganic or organic with low Tcrit), and 1 is for water.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TMVOC
- Reported - view
Re: ECO2N / ECO2M: handling of wettability in a dry zone
@Prince Kumar Having XCO2 going to 1 it's OK, as you are injecting CO2 (with a tiny amount of water, which is a good practice to avoid just one component in any of the grid blocks).…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: ECO2N / ECO2M: handling of wettability in a dry zone
@Prince Kumar Not sure I have understood which is the issue you have. Having a complete dry-out of the formation around the injection well? With SW going to zero? SS goin to 1 ?…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Help deciding EOS7C or EOS7CA
@Jordon Massey I think EOS7C should give rather accurate thermodynamic equilibria and thermophysical properties of gas and aqueous phases at near surface conditions too.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- 1
- TOUGH2
- Reported - view
Re: Help deciding EOS7C or EOS7CA
Jordon, Have you considered to use TMVOC under Petrasim? It can handle mixtures of CH4 and air with a thermodynamic description suitable for low pressure conditions. Alfredo
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Printout problem with TIMES
OK. This seems to be a different question, but I'm not sure to have understood what you would like to have. I think TIMES lets you specify at which simulation times the code shall make a printout.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Printout problem with TIMES
I think TOUGH2 is doing what it should do. FOFT controls the printout of a fixed number of parameters at each time step for the listed elements. TIMES controls the printout of main output tables.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Modelling of high temperature (600 ℃) air injection.
Dear Xin, you posted in the TOUGH2 section, so I assume you are using TOUGH2. No standard TOUGH2 module can go above 350°C, which is the limit of liquid water properties of Region 1 in the IAPWS P-T…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- 1
- TOUGH2
- Reported - view
Re: CO2 storage in saline aquifer with ECO2N
I would start looking at mass balance equations for the generic component in ECO2N user's guide. All needed parameters should be printed in the main output table,…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGH2
- Reported - view
Re: CO2 storage in saline aquifer with ECO2N
I guess you could compute for each grid element belonging to the rock domains affected by CO2 migration: mass of dissolved CO2: MCO2w = V phi (1. - SG) DL XCO2aq CO2 mass in the gas (NA) phase:…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGH2
- Reported - view
Re: About the SEED with porosity
Hi Luoluo. SEED allows to use permeability modifiers only. A similar option is not available for porosity. But you should be able to assign element by element porosity values (PORX) just using the…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view

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