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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Ecrin Guided Session #1 • EcrGS01 - 36/36
In this case the Arps analysis is not useful since there is no significant rate decline during the
history. The Fetkovich plot is not useful either since its validity assumes constant flowing
pressure which is not the case in this example.
This highlight the necessity to model the well production behavior with theoretical models
taking into account reservoir geometry and material balance, similar to those used in pressure
transient analysis, as these are the only tools that can make reasonable forecast in such cases.
F01.1 • Forecast
Click the Forecast button and choose to extrapolate the current model
and to generate q(p).
Click on the button to enter the forecast criteria.
Hit the Duration unit header, change it from ‘Hours’ to 'Day'.
Add two lines to forecast the production forward 200 days, respectively 100 days at a
pressure of 4,000 psia (expected flowing bottomhole pressure) and 100 days at a pressure
of 3,990 psia.
Fig. F01.5 • Forecast criteria
Click 'OK' and 'Generate'. Forecast is displayed in the history plot, Figure F01.6.
Fig. F01.6 • Forecast