Alfredo Battistelli's Profile - TOUGH User Community

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Re: The Example in TOUGH2's ECO2N：Radial Flow from a CO2 Injection Well
@上衫绘梨衣 The second case above is related to a non-isothermal simulation in which the bottom-hole injection T is held constant by specifying an infinite rock density.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: The Example in TOUGH2's ECO2N：Radial Flow from a CO2 Injection Well
Dear Luo, two cases are simulated, one is a isothermal problem in which the energy balance equation is not solved (NEQ=3), the second is a non-isothermal problem (NEQ=4) in which the wellbore…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: EOS3-sink/source rates are piecewise constant, how to set up?
@Zhubin Chu With the info supplied I cannot help you. Looking at the output file and in particular to the history of well blocks, you can easily check if the P drops to too low values during…
Attachments
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: EOS3-sink/source rates are piecewise constant, how to set up?
Dear Chu, if you want to use the Wells option in Petrasim, you need to assign the variable production and injection schedule in the Wells/flow window by assigning times-rates for the production and…
Attachment
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: crashing after reaching equilibrium and starting VOC injection
Hi Alireza. Your output shows PG=infinite and this is the cause of the phase switches from aqueous to two phase Aq+G. PG is the sum of partial pressures of components in the aqueous phase and,…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TMVOC
- Reported - view
Re: Defining Tortuosity
Petrasim uses modified TOUGH2 executables containing the saving of simulation results on specific files that are then read by Petrasim. In addition, the grid used must be built using PetraSim.…
- Reservoir Engineer
- Alfredo_b
- 1 yr ago
- TOUGH2
- Reported - view
Re: Methods to Place GENER Block
Nicholas, PetraSim can help you prepare a TOUGH input file including the proper location of production/reinjection wells in the conceptual model and then in the discretization grid. Alfredo
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: Run ends early
Nicholas, You should check why the simulation is not converging, looking at messages, at the element causing the non convergence and at its thermodynamic state,…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: Run ends early
Hi Nicholas. From your mesh file it seems you are using a single horizontal layer (NZ=1). The infile reports initial conditions only for the injection element: P=5.86E6 Pa, T=12°C and Xair=0.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: Defining Tortuosity
You should run the first segment without diffusion. Then run a restart by assigning the desired diffusion parameters.
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Defining Tortuosity
I have to correct my self. I made a wrong check in PetraSim: actually the code accepts negative diffusivities. Thus, even the third TOUGH2 option mentioned in the previous post can be chosen in…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Defining Tortuosity
Hi Abdelrazik. TOUGH2 allows 3 options for assigning the tortuosity coefficient and the the diffusivities used to compute the diffusion fluxes (see pag. 159 of the User's guide).…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Facing problem to match TOUGH output with excel and Python
I noticed the following: * the thermal diffusivity for the given parameters seems to be 3.368E-6 m2/s, not the stated 1.28E-4 m2/s. * you want to inject heat at 30 W/m2.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: ECO2N / ECO2M: handling of wettability in a dry zone
Hi Godarzi. When dry CO2, or any other dry gas, is injected in a medium containing water, water is evaporated according to local thermodynamic equilibrium eventually promoting the complete…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGH2
- Reported - view
Re: How to set a production well with constant pressure
@selin dai what I see is that you start with a tiny time step and convergence is achieved at the first iteration. Thus, with no changes of primary variables.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH+
- Reported - view
Re: How to set a production well with constant pressure
Brad, I think a rigorous approach would require the use of a coupled wellbore-reservoir flow solution, like that avaialable in T2Well. I'm not aware if something similar is available in TOUGH+.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGH+
- Reported - view
Re: How to set a production well with constant pressure
Actually, TOUGH2/3 and I think TOUGH+ too, could use virtual elements (like those with infinite volume) connected to any element of the discretization grid.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH+
- Reported - view
Re: Blank MESH
@Huanwei Shi Have a look to the user guide, such as Pruess et al. (1999). TOUGH2 USER’S GUIDE, VERSION 2, LBNL-43134. Revised September 2012. At pag. 94 :…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGH2
- Reported - view
Re: applying heat load in BHE and varying input T?
I guess you should remove the inactive cell at DHE input and use GENER to inject your variable fluid rate history by assigning the injection enthalpy corresponding to your desired inlet T vs time.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: applying heat load in BHE and varying input T?
Dear Hanna, I understood you want to apply a heat load to your entire BHE. But you applied the heat load by just injecting heat into the BHE inlet (eleme A1000).…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: CHEMP block for diesel and gasoline?
Mikey, as diesel fuel and gasoline are complex HC mixtures, if you want to simulate approximately their thermodynamic behaviour you might use a pseudo-component approach as customary made in the O&G…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TMVOC
- Reported - view
Re: Pressure vs CO2 DG
Jose, if you are using T2Well, it would probably mean that domain belongs to a wellbore section for which you want the calculation of wellbore heat exchange using the analytical formulation by Ramey.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Pressure reporting: Tgh2-ECO2M
Apologize for the typo: I used T2Well-ECO2M (not ECOM). A.
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Efficient time stepping with great variability in pumping/shutin period durations
Yannick, I would try using the actual pumping history with MOP(12) =2. In this way you should at least replicate the cumulative production during each time step.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: Pressure reporting: Tgh2-ECO2M
Godarzi, I need to clarify my previous post. The ECOM version I used is V.2 by Lehua Pan which can simulate H2O-CO2-NaCl mixtures up to 300°C. It seems it is not able to accept the ECO2N style INCON…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view

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