Tuning EOS parameters

[Shakespear]

I have read the PVTi manual

But did you do the Tutorials that are in that manual?
None of this tuning work is easy and I think it very difficult to explain it through emails. That is why a course is the best way to go. However the tutorials are good way to go because they go step-by-step to show you the procedure.

The Whitson videos were the best that I have seen on the net regarding PVT analysis. However even in this case the problems they did were not available hence you only get half of the knowledge.

Look here and see if some useful info may be located

[link Point to another website Only the registered members can access]

[link Point to another website Only the registered members can access]

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[link Point to another website Only the registered members can access]

[link Point to another website Only the registered members can access]

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Whitson's lecture stressed what is in this paper

[link Point to another website Only the registered members can access]
and he made it know that he thought that his program did a better job of controlling the tuning process than PVTi. You would need to listen to the lecture to try and understand this.

Also you would need to do a validation of your pVT data else your tuning will go nowhere.

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[hoanglongbk88]

I know that it is very difficult to tune the EOS parameters. I read the tutorial of PVTi. As you see there are a lot of combinations of regression variables. I tried to do step by step as PVTi tutorial procedure. Firstly I split the C7+ into SCN45 by Whitson method , then I matched the dewpoint pressure based on the extended composition. Next, I group into 6 pseudo components ( N2C1, CO2+C2+C3, C4 to C6, MCN1,MCN2). I match dewpoint pressure again. Finally , I match other PVT properties. THe viscosity I match the last.
I dont know when we should set weight for dew point pressure to preserve this value in the regression. And which error is the PVT properties compared with the observations after tunning ?( maybe below 5%).
I read the SPE as " New strategy to NEW STRATEGIC METHOD TO TUNE EQUATION-OF-STATE TO MATCH EXPERIMENTAL DATA FOR COMPOSITIONALSIMULATION" or " An effcient Tuning Strategy to calibrate Cubic EOS for Compositional simualtion" But I hardly do these strategies on PVTi. I am really cuirous which solfware these authors use. WHo can help me tho answer above questions? THank you so much.

[Shakespear]

Have a look

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[link Point to another website Only the registered members can access]

[link Point to another website Only the registered members can access]

[link Point to another website Only the registered members can access]