2 water tracer test simulation with Revision 5.xxx

[iwarren]

Has anyone successfully used EOS1 with water plus tracer option, i.e., actually had the simulation run beyond loading the TOUGH2 file and produced values for X2?

[JuDi]

Hi,

a little late here for the original post I guess. But since I had the same question. I wanted to share what helped me to get five-spot sample:

Based on recommendations in this post on the tough forum, I set the initial fraction of tracer to 0.01 in the reservoir and only injected tracer (no water). Thus I see in the resulting plots how the injected water moves away from the injection well.

Julia

[Alfredo]

What TOUGH2 does not like is to solve  the mass balance of a component which is not present at all in a grid block.

For this reason initializing a non zero mass fraction of water 2 allows to proceed with the simulation. Actually, initial concentrations much lower than 0.01 can be succesfully used.

Again, in case of injection (sources), if pure water is injected for long times the mass fraction of water 2 can be reduced to 0. All sources should not inject just water, but also a tiny fraction of water 2, adding an additional source. 

 

This problem is in principle present in all the EOS with more than just one component.

Alfredo