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Re: How to simulate bubble flow in non-Newtonian fluids (such as drilling mud)? Thanks Stefan, that is what I thought about, but wasn't sure. Yes, I am trying to figure out a way to simulate discrete bubble rise in drilling mude in a well annulus.…
- Qian Z.
- Qian_Z
- 5 yrs ago
- TOUGH2
- Reported - view
0
How to simulate bubble flow in non-Newtonian fluids (such as drilling mud)?
I am trying to create multiple simulation scenarios, one of them is to simulate discrete bubble flow through drilling much, which is also a non-Newtonian fluid.…
- Qian Z.
- Qian_Z
- 5 yrs ago
- 3 replies
- 730
- TOUGH2
Re: How to model a leakage around existing well annulus in TOUGH Hi Stefan, Thank you very much for confirming my doubts and your valuable suggestions. I think I will start with (2) to see whether the results are acceptable before I move forward with TOGUH+. Qian
- Qian Z.
- Qian_Z
- 5 yrs ago
- TOUGH2
- Reported - view
Re: How to model a leakage around existing well annulus in TOUGH Hi Amy, Thanks for your reply, the paper you shared is definitely helpful. I think what I am trying to figure out is whether I can still use TOUGH under a really high-porosity (>0.…
- Qian Z.
- Qian_Z
- 5 yrs ago
- TOUGH2
- Reported - view
Re: How to model a leakage around existing well annulus in TOUGH Hi Amy, I just wonder whether you happen to find a way to deal with leakage pathways?
- Qian Z.
- Qian_Z
- 5 yrs ago
- TOUGH2
- Reported - view
Re: How to model a leakage around existing well annulus in TOUGH Hi, the aperture I am referring is the void space between casing and tubing, where fluid flow can occur. This is the potential leakage pathway for gas.…
- Qian Z.
- Qian_Z
- 5 yrs ago
- TOUGH2
- Reported - view
0
How to model a leakage around existing well annulus in TOUGH
We are trying to model gas leakage around exisiting well annulus (The space between wellbore and casing, where fluid flow can occur). However, the aperture is relative large and I wonder whether…
- Qian Z.
- Qian_Z
- 5 yrs ago
- 8 replies
- 624
- TOUGH2
0
How to set-up a model that reacts only on the surface
I am trying to set-up a model that simulates a leaching experiment. The material is very impermeable (flow is not supposed to go through) and based on existed data,…
- Qian Z.
- Qian_Z
- 7 yrs ago
- 609
- TOUGHREACT
Re: What does negative H+ concentration mean in TOUGHREACT? Oh, I see the point now. That also explains the difference between the "Total Aqueous component concentrations" and "Aqueous species concentrations". Thanks!
- Qian Z.
- Qian_Z
- 8 yrs ago
- TOUGHREACT
- Reported - view
2
What does negative H+ concentration mean in TOUGHREACT?
I am running some simuations, the results seem to make sense (including pH). But why does the h+ concentrations are negative? Is there a special calculation to convert h+ to pH?
- Qian Z.
- Qian_Z
- 8 yrs ago
- 2 replies
- 2,141
- 2
- TOUGHREACT
0
Why it takes unbelievable long time to run kinetics?
It seems that TOUGHREACT starts to choke when I add kinetics to the chemistry of the my model. The model runs just fine for equilibrium. But once I add kinetics,…
- Qian Z.
- Qian_Z
- 8 yrs ago
- 810
- TOUGHREACT
Re: what if a primary species is not defined in the database? I am still trying to figure out why I encounter "singular matrix in chemical solver" problem all the time. I have input the initial water composition after equlibriated with the mineral system,…
- Qian Z.
- Qian_Z
- 8 yrs ago
- TOUGHREACT
- Reported - view
Re: what if a primary species is not defined in the database? Oh, I see how TOUGHREACT handles the speciation problems. I am using Phreeqc to generate realistic initial water chemistry for TOUGHREACT (which will be in equilibrium with the mineral system),…
- Qian Z.
- Qian_Z
- 8 yrs ago
- TOUGHREACT
- Reported - view
Re: what if a primary species is not defined in the database? Thanks for yor information, Nic, that was very helpful. One more question related to this, if the component has several aqueous phases, and one of them is the primary species,…
- Qian Z.
- Qian_Z
- 8 yrs ago
- TOUGHREACT
- Reported - view
0
what if a primary species is not defined in the database?
The modeling I am working on involves some initial species that are not defined as primary species in the database. Although I have figured out how to define a new mineral in the database,…
- Qian Z.
- Qian_Z
- 8 yrs ago
- 8 replies
- 2,788
- TOUGHREACT

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