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Lumped Model Generation

The lumping method differs in whitsonPVT compared to most other PVT softwares. The feature uses an automated lumping scheme, where the software will find the optimal pseudo-component grouping based on a calculation.

As with the black-oil table generation, there are two ways of navigating to the 'EOS Lumping' page. These are both located next to the BOT buttons. One is in the left navigation bar, while there is an option to jump from the fluid model overview as well.


Inputs

There are 3 input sections in the lumping overview. The 'Lumping Configuration', 'Experiment Data' and 'Lumping Basis Data'.


The 'Lumping Configuration' is where we would select the amount of components we would like to have in our child model, along with how long we would like the calculation to run. The 'fast' 'Lumping Approach' will run quickly, and provide the best lumping combination found during the search. If we change this to extensive, we allow the search to run longer, which may yield an improved grouping.

We could also set constraints, which would allow us to force certain groupings, or prevent components to be grouped together. Try setting CO2 as an independent component through the 'split' option, and C30+ as a grouping using the 'Group' button.


Results

Once we have selected our inputs, we can run the automized lumping by clicking 'Run Lumping', which will show us the comparison between the lumped model and the detailed parent model.


Export

Next, we click 'Store' to save our lumped model and can continue with exporting it to whatever file format we would like.


Next Steps

Having successfully generated both black-oil and lumped models, you can claim your Child Model Development Certificate!!