Alfredo Battistelli's Profile - TOUGH User Community

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Re: Simulated CO2 injection into aquifers using T2WELL/ECO2M did not run successfully
@happy12688 To inject CO2 at WH there are basically two approaches: - inject at constant T; - inject at constant enthalpy. If you inject at constant enthalpy,…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Simulated CO2 injection into aquifers using T2WELL/ECO2M did not run successfully
It is difficult to understand what it is not going on properly. I just noticed that the injection element reaches a low negative temperature of -17.96°C at about 20.4 bar.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Can TOUGHREACT automatically calculate injection rate into each element?
Not sure it can work. What is needed is something to emulate the injection wellbore. A column of elements shall be added and connected to the injection elements.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- 1
- TOUGHREACT
- Reported - view
Re: Empty SAVE file
@Dimas Taha Maulana Model.sim is loaded by PetraSim and the simulation runs nicely. I just increased the time to 10 years to be sure nothing strange happens after 1 year simulation.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Empty SAVE file
Do yo have the *.sim Petrasim file? Can you share it?
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Empty SAVE file
You should inspect the output file looking for some message which can tell you why the model did not run. You can see where the run stopped looking at output file contents.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Empty SAVE file
Dimas, are you sure the code ran your "field" input dat file? Lineq file is empty and it suggests no NR iterations have been made. Vers file is only 2 kB, while for the "simple" run it was 5 kB.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: EOS3-sink/source rates are piecewise constant, how to set up?
@Zhubin Chu There are different codes available to build discretization grids like those shown. You can find the main ones on the TOUGH page (https://tough.lbl.gov/pre-and-post-processors/).…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
Re: Last bock in CO2TAB file
@Shijun Fan As you wrote, 15 is related to the number of data for each parameter given afterward. 101 is parameter NP2, which is read but not used in ECO2N.f. 10 is parameter NP1.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGHREACT
- Reported - view
Re: Last bock in CO2TAB file
The first 3 lines contain 15 T values along the CO2saturation line. Subsequent lines contain parameters of gaseous CO2 along the saturation line corresponding to the T values: lines 4-6 :…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGHREACT
- Reported - view
Re: Run ends early
Nick, I apologize, but I missed your post. I imagine is too late for a feedback... Any way, in your run the time step is always cut because of gas phase appearance in eleme C1f21 driven by a…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: zero pore pressure boundary condition
I guess that if geomechanical properties are not function of P, and system changes are dependent on P changes only, you my probably shift the 0 P boundary to atmospheric P.…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: zero pore pressure boundary condition
I cannot run EOS3 under TOUGH3, so I'm referring to EOS3 supported by TOUGH2. EOS3 assumes that if the first primary variable X1<374.15 (the critical temperature of water for IFC67),…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH3
- Reported - view
Re: How to realize an air-injection well with constant bottom-hole pressure?
I'm afraid there is no explicit option in TOUGH2 to simulate injection with constant BHP. One possible approach could be to simulate the wellbore explicitely in the discretisation grid,…
- Reservoir Engineer
- Alfredo_b
- 2 yrs ago
- TOUGH2
- Reported - view
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
- 2 yrs 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
- 2 yrs 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
- 2 yrs 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
- 2 yrs 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
- 2 yrs 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
- 2 yrs 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

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