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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Topaze Guided Session #1 • TopGS01 - 6/24
The ‘Extraction’ step amounts to selecting a rate channel, and possibly a pressure gauge for
interpretation, and a time range. In addition, as several diagnostic plots use a log of time, a
logarithmic filtration of the data is offered. This is mainly useful when both rates and pressure
are loaded. When only rates are present, the analysis plots display by default the full history
(not the sampled version), unless there is a large number of points.
Accept the default for the Extraction and validate with OK.
Among the plots that Topaze will create by default
for the analysis is a Fetkovich type-curve plot. Some
of the results in this plot are linked to values of Pi,
initial reservoir pressure, and Pw, well flowing
pressure. When no pressure gauge is loaded, you
are prompted to enter those values. If no input is
given (i.e. values stay absent) the plot is not
created. Input the values indicated in Figure B01.10. Fig. B01.10 • Fetkovich type-curve
plot input
Validate with OK. Two new plots are created: Fetkovich type-curve and ARPS.
Fig. B01.11 • Extraction done