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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Saphir Guided Session #4 • SapGS04 - 6/11
Fig. C01.3 • Improve setup
The history match is now nearly perfect.
The Skin versus Rate plot shows the red line as the resulting rate dependency of the model
after regression and clearly shows the problem discussed before as the red line does not
overlay the green straight line resulting from the semilog analysis. Figure C01.4.
To obtain a similar Skin versus Rate plot, zoom out by clicking on .
Fig C01.4 History match and skin versus rate plot
D01 • Inflow performance (IPR)
The modified isochronal test is normally carried out to assess the potential of the well and to
determine its absolute open flow. For gas wells in addition to Darcy and Jones methods, we
have multi-rate IPRs incorporated in Saphir for the C and N and the LIT methods.