Reservoir simulation little help

[Petrol4]

hello
can anyone tell me what is the explanation of this picture

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[vinomarky]

Did you even read it or look at the axes? Looks pretty self explanatory to me. There are many levels of rigor that can be brought to bear on solving a problems or answering a question, and they have differing levels of complexity - from as simple as using analogs, to doing full field integrated modelling